├── app
    ├── .gitignore
    ├── src
    │   ├── main
    │   │   ├── res
    │   │   │   ├── values
    │   │   │   │   ├── strings.xml
    │   │   │   │   ├── colors.xml
    │   │   │   │   └── themes.xml
    │   │   │   ├── mipmap-hdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-mdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-xhdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-xxhdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-xxxhdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── values-night
    │   │   │   │   └── themes.xml
    │   │   │   ├── mipmap-anydpi-v26
    │   │   │   │   ├── ic_launcher.xml
    │   │   │   │   └── ic_launcher_round.xml
    │   │   │   ├── layout
    │   │   │   │   ├── activity_flex_list.xml
    │   │   │   │   ├── activity_vertical_list.xml
    │   │   │   │   ├── activity_grid_list.xml
    │   │   │   │   ├── activity_pager_list.xml
    │   │   │   │   ├── activity_staggered_list.xml
    │   │   │   │   ├── activity_horizontal_list.xml
    │   │   │   │   ├── item_grid_list.xml
    │   │   │   │   ├── item_pager_list.xml
    │   │   │   │   ├── item_staggered_list.xml
    │   │   │   │   ├── item_horizontal_list.xml
    │   │   │   │   ├── item_flex_list.xml
    │   │   │   │   ├── activity_main.xml
    │   │   │   │   ├── item_vertical_list.xml
    │   │   │   │   └── item_grid_video.xml
    │   │   │   ├── xml
    │   │   │   │   ├── backup_rules.xml
    │   │   │   │   └── data_extraction_rules.xml
    │   │   │   ├── drawable-v24
    │   │   │   │   └── ic_launcher_foreground.xml
    │   │   │   └── drawable
    │   │   │   │   └── ic_launcher_background.xml
    │   │   ├── java
    │   │   │   └── com
    │   │   │   │   └── simple
    │   │   │   │       └── itemvisibility
    │   │   │   │           ├── flex
    │   │   │   │               ├── ListModel.kt
    │   │   │   │               ├── FlexListAdapter.kt
    │   │   │   │               └── FlexListActivity.kt
    │   │   │   │           ├── gird
    │   │   │   │               ├── ListModel.kt
    │   │   │   │               ├── GridListAdapter.kt
    │   │   │   │               └── GridListActivity.kt
    │   │   │   │           ├── staggered
    │   │   │   │               ├── ListModel.kt
    │   │   │   │               ├── StaggeredListAdapter.kt
    │   │   │   │               └── StaggeredListActivity.kt
    │   │   │   │           ├── MainActivity.kt
    │   │   │   │           ├── pager
    │   │   │   │               ├── PagerListAdapter.kt
    │   │   │   │               └── PagerListActivity.kt
    │   │   │   │           ├── verticallist
    │   │   │   │               ├── VerticalListAdapter.kt
    │   │   │   │               └── VerticalListActivity.kt
    │   │   │   │           ├── horizontallist
    │   │   │   │               ├── HorizontalListAdapter.kt
    │   │   │   │               └── HorizontalListActivity.kt
    │   │   │   │           └── renderer
    │   │   │   │               └── TextureRenderView.kt
    │   │   └── AndroidManifest.xml
    │   ├── test
    │   │   └── java
    │   │   │   └── com
    │   │   │       └── simple
    │   │   │           └── itemvisibility
    │   │   │               └── ExampleUnitTest.kt
    │   └── androidTest
    │   │   └── java
    │   │       └── com
    │   │           └── simple
    │   │               └── itemvisibility
    │   │                   └── ExampleInstrumentedTest.kt
    ├── proguard-rules.pro
    └── build.gradle
├── library
    ├── .gitignore
    ├── consumer-rules.pro
    ├── src
    │   └── main
    │   │   └── java
    │   │       └── com
    │   │           └── github
    │   │               └── mminng
    │   │                   └── itemvisibility
    │   │                       ├── logger
    │   │                           └── Logger.kt
    │   │                       ├── listener
    │   │                           ├── OnItemStateChangeListener.kt
    │   │                           └── ItemStateChangeListener.kt
    │   │                       └── ItemVisibilityHelper.kt
    ├── proguard-rules.pro
    └── build.gradle
├── screenshots
    └── simple.gif
├── gradle
    └── wrapper
    │   ├── gradle-wrapper.jar
    │   └── gradle-wrapper.properties
├── settings.gradle
├── .gitignore
├── gradle.properties
├── README.md
├── gradlew.bat
├── gradlew
└── LICENSE


/app/.gitignore:
--------------------------------------------------------------------------------
1 | /build


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/library/.gitignore:
--------------------------------------------------------------------------------
1 | /build


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/library/consumer-rules.pro:
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1 | 


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/screenshots/simple.gif:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/screenshots/simple.gif


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/app/src/main/res/values/strings.xml:
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1 | <resources>
2 |     <string name="app_name">ItemVisibility</string>
3 | </resources>


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/gradle/wrapper/gradle-wrapper.jar:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/gradle/wrapper/gradle-wrapper.jar


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/app/src/main/res/mipmap-hdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.webp


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/app/src/main/res/mipmap-mdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.webp


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/app/src/main/res/mipmap-xhdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.webp


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/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp


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/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp


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/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp


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/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp


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/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp


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/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp


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/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp:
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https://raw.githubusercontent.com/mminng/item-visibility-helper/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp


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/app/src/main/res/values/colors.xml:
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1 | <?xml version="1.0" encoding="utf-8"?>
2 | <resources>
3 |     <color name="black">#FF000000</color>
4 |     <color name="white">#FFFFFFFF</color>
5 | </resources>


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/app/src/main/java/com/simple/itemvisibility/flex/ListModel.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.flex
 2 | 
 3 | /**
 4 |  * Created by zh on 2023/5/20.
 5 |  */
 6 | data class ListModel(
 7 |     val url: String,
 8 |     val title: String
 9 | )
10 | 


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/app/src/main/java/com/simple/itemvisibility/gird/ListModel.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.gird
 2 | 
 3 | /**
 4 |  * Created by zh on 2023/5/20.
 5 |  */
 6 | data class ListModel(
 7 |     val url: String,
 8 |     val isVideoType: Boolean
 9 | )
10 | 


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/app/src/main/java/com/simple/itemvisibility/staggered/ListModel.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.staggered
 2 | 
 3 | /**
 4 |  * Created by zh on 2023/5/20.
 5 |  */
 6 | data class ListModel(
 7 |     val url: String,
 8 |     val height: Int
 9 | )
10 | 


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/gradle/wrapper/gradle-wrapper.properties:
--------------------------------------------------------------------------------
1 | #Thu Apr 27 14:24:59 CST 2023
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip
5 | zipStoreBase=GRADLE_USER_HOME
6 | zipStorePath=wrapper/dists
7 | 


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/app/src/main/res/values-night/themes.xml:
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1 | <resources xmlns:tools="http://schemas.android.com/tools">
2 |     <!-- Base application theme. -->
3 |     <style name="Base.Theme.ItemVisibility" parent="Theme.Material3.DayNight.NoActionBar">
4 |         <!-- Customize your dark theme here. -->
5 |         <!-- <item name="colorPrimary">@color/my_dark_primary</item> -->
6 |     </style>
7 | </resources>


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/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml:
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1 | <?xml version="1.0" encoding="utf-8"?>
2 | <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
3 |     <background android:drawable="@drawable/ic_launcher_background" />
4 |     <foreground android:drawable="@drawable/ic_launcher_foreground" />
5 |     <monochrome android:drawable="@drawable/ic_launcher_foreground" />
6 | </adaptive-icon>


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/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml:
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1 | <?xml version="1.0" encoding="utf-8"?>
2 | <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
3 |     <background android:drawable="@drawable/ic_launcher_background" />
4 |     <foreground android:drawable="@drawable/ic_launcher_foreground" />
5 |     <monochrome android:drawable="@drawable/ic_launcher_foreground" />
6 | </adaptive-icon>


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/app/src/main/res/layout/activity_flex_list.xml:
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1 | <?xml version="1.0" encoding="utf-8"?>
2 | <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
3 |     android:id="@+id/f_listview"
4 |     android:layout_width="match_parent"
5 |     android:layout_height="match_parent"
6 |     android:clipToPadding="false"
7 |     android:paddingStart="15dp"
8 |     android:paddingTop="15dp"
9 |     android:paddingEnd="0dp" />


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/app/src/main/res/values/themes.xml:
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1 | <resources xmlns:tools="http://schemas.android.com/tools">
2 |     <!-- Base application theme. -->
3 |     <style name="Base.Theme.ItemVisibility" parent="Theme.Material3.DayNight.NoActionBar">
4 |         <!-- Customize your light theme here. -->
5 |         <!-- <item name="colorPrimary">@color/my_light_primary</item> -->
6 |     </style>
7 | 
8 |     <style name="Theme.ItemVisibility" parent="Base.Theme.ItemVisibility" />
9 | </resources>


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/app/src/test/java/com/simple/itemvisibility/ExampleUnitTest.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility
 2 | 
 3 | import org.junit.Test
 4 | 
 5 | import org.junit.Assert.*
 6 | 
 7 | /**
 8 |  * Example local unit test, which will execute on the development machine (host).
 9 |  *
10 |  * See [testing documentation](http://d.android.com/tools/testing).
11 |  */
12 | class ExampleUnitTest {
13 |     @Test
14 |     fun addition_isCorrect() {
15 |         assertEquals(4, 2 + 2)
16 |     }
17 | }


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/library/src/main/java/com/github/mminng/itemvisibility/logger/Logger.kt:
--------------------------------------------------------------------------------
 1 | package com.github.mminng.itemvisibility.logger
 2 | 
 3 | import android.util.Log
 4 | import com.github.mminng.itemvisibility.BuildConfig
 5 | 
 6 | internal fun loggerD(msg: String) {
 7 |     if (BuildConfig.DEBUG) {
 8 |         Log.d("ItemVisibilityHelper", msg)
 9 |     }
10 | }
11 | 
12 | internal fun loggerI(msg: String) {
13 |     if (BuildConfig.DEBUG) {
14 |         Log.i("ItemVisibilityHelper", msg)
15 |     }
16 | }


--------------------------------------------------------------------------------
/settings.gradle:
--------------------------------------------------------------------------------
 1 | pluginManagement {
 2 |     repositories {
 3 |         google()
 4 |         mavenCentral()
 5 |         gradlePluginPortal()
 6 |     }
 7 | }
 8 | dependencyResolutionManagement {
 9 |     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
10 |     repositories {
11 |         google()
12 |         mavenCentral()
13 |         maven { url 'https://www.jitpack.io' }
14 |     }
15 | }
16 | rootProject.name = "ItemVisibilityHelper"
17 | include ':app'
18 | include ':library'
19 | 


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/app/src/main/res/layout/activity_vertical_list.xml:
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1 | <?xml version="1.0" encoding="utf-8"?>
2 | <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
4 |     xmlns:tools="http://schemas.android.com/tools"
5 |     android:id="@+id/v_listview"
6 |     android:layout_width="match_parent"
7 |     android:layout_height="match_parent"
8 |     app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
9 |     tools:listitem="@layout/item_vertical_list" />


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/app/src/main/res/xml/backup_rules.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?><!--
 2 |    Sample backup rules file; uncomment and customize as necessary.
 3 |    See https://developer.android.com/guide/topics/data/autobackup
 4 |    for details.
 5 |    Note: This file is ignored for devices older that API 31
 6 |    See https://developer.android.com/about/versions/12/backup-restore
 7 | -->
 8 | <full-backup-content>
 9 |     <!--
10 |    <include domain="sharedpref" path="."/>
11 |    <exclude domain="sharedpref" path="device.xml"/>
12 | -->
13 | </full-backup-content>


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/.gitignore:
--------------------------------------------------------------------------------
 1 | # Gradle files
 2 | .gradle/
 3 | build/
 4 | 
 5 | # Local configuration file (sdk path, etc)
 6 | local.properties
 7 | 
 8 | # Log/OS Files
 9 | *.log
10 | 
11 | # Android Studio generated files and folders
12 | captures/
13 | .externalNativeBuild/
14 | .cxx/
15 | *.apk
16 | output.json
17 | 
18 | # IntelliJ
19 | *.iml
20 | .idea/
21 | misc.xml
22 | deploymentTargetDropDown.xml
23 | render.experimental.xml
24 | 
25 | # Keystore files
26 | *.jks
27 | *.keystore
28 | 
29 | # Google Services (e.g. APIs or Firebase)
30 | google-services.json
31 | 
32 | # Android Profiling
33 | *.hprof


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/app/src/main/res/xml/data_extraction_rules.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?><!--
 2 |    Sample data extraction rules file; uncomment and customize as necessary.
 3 |    See https://developer.android.com/about/versions/12/backup-restore#xml-changes
 4 |    for details.
 5 | -->
 6 | <data-extraction-rules>
 7 |     <cloud-backup>
 8 |         <!-- TODO: Use <include> and <exclude> to control what is backed up.
 9 |         <include .../>
10 |         <exclude .../>
11 |         -->
12 |     </cloud-backup>
13 |     <!--
14 |     <device-transfer>
15 |         <include .../>
16 |         <exclude .../>
17 |     </device-transfer>
18 |     -->
19 | </data-extraction-rules>


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/app/src/main/res/layout/activity_grid_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     android:id="@+id/g_listview"
 5 |     android:layout_width="match_parent"
 6 |     android:layout_height="match_parent"
 7 |     android:clipToPadding="false"
 8 |     android:paddingStart="15dp"
 9 |     android:paddingTop="5dp"
10 |     android:paddingEnd="5dp"
11 |     android:paddingBottom="15dp"
12 |     app:layout_constraintBottom_toBottomOf="parent"
13 |     app:layout_constraintEnd_toEndOf="parent"
14 |     app:layout_constraintStart_toStartOf="parent"
15 |     app:layout_constraintTop_toTopOf="parent" />


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/app/src/main/res/layout/activity_pager_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:id="@+id/p_listview"
 6 |     android:layout_width="match_parent"
 7 |     android:layout_height="match_parent"
 8 |     app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
 9 |     app:layout_constraintBottom_toBottomOf="parent"
10 |     app:layout_constraintEnd_toEndOf="parent"
11 |     app:layout_constraintStart_toStartOf="parent"
12 |     app:layout_constraintTop_toTopOf="parent"
13 |     tools:listitem="@layout/item_pager_list" />


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/library/src/main/java/com/github/mminng/itemvisibility/listener/OnItemStateChangeListener.kt:
--------------------------------------------------------------------------------
 1 | package com.github.mminng.itemvisibility.listener
 2 | 
 3 | import android.view.View
 4 | 
 5 | /**
 6 |  * Created by zh on 2023/4/27.
 7 |  */
 8 | internal interface OnItemStateChangeListener {
 9 | 
10 |     /**
11 |      * 激活Item，提供被激活的Item[view]和Item[position]。
12 |      */
13 |     fun onActivateItem(view: View, position: Int)
14 | 
15 |     /**
16 |      * 关闭Item，提供被关闭的Item[view]和Item[position]。
17 |      */
18 |     fun onDeactivateItem(view: View, position: Int)
19 | 
20 |     /**
21 |      * 暂停Item，提供被暂停的Item[view]和Item[position]。
22 |      */
23 |     fun onPauseItem(view: View, position: Int)
24 | 
25 |     /**
26 |      * 恢复Item，提供被恢复的Item[view]和Item[position]。
27 |      */
28 |     fun onResumeItem(view: View, position: Int)
29 | }


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/app/proguard-rules.pro:
--------------------------------------------------------------------------------
 1 | # Add project specific ProGuard rules here.
 2 | # You can control the set of applied configuration files using the
 3 | # proguardFiles setting in build.gradle.
 4 | #
 5 | # For more details, see
 6 | #   http://developer.android.com/guide/developing/tools/proguard.html
 7 | 
 8 | # If your project uses WebView with JS, uncomment the following
 9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | #   public *;
13 | #}
14 | 
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 | 
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile


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/app/src/androidTest/java/com/simple/itemvisibility/ExampleInstrumentedTest.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility
 2 | 
 3 | import androidx.test.platform.app.InstrumentationRegistry
 4 | import androidx.test.ext.junit.runners.AndroidJUnit4
 5 | 
 6 | import org.junit.Test
 7 | import org.junit.runner.RunWith
 8 | 
 9 | import org.junit.Assert.*
10 | 
11 | /**
12 |  * Instrumented test, which will execute on an Android device.
13 |  *
14 |  * See [testing documentation](http://d.android.com/tools/testing).
15 |  */
16 | @RunWith(AndroidJUnit4::class)
17 | class ExampleInstrumentedTest {
18 |     @Test
19 |     fun useAppContext() {
20 |         // Context of the app under test.
21 |         val appContext = InstrumentationRegistry.getInstrumentation().targetContext
22 |         assertEquals("com.simple.itemvisibility", appContext.packageName)
23 |     }
24 | }


--------------------------------------------------------------------------------
/library/proguard-rules.pro:
--------------------------------------------------------------------------------
 1 | # Add project specific ProGuard rules here.
 2 | # You can control the set of applied configuration files using the
 3 | # proguardFiles setting in build.gradle.
 4 | #
 5 | # For more details, see
 6 | #   http://developer.android.com/guide/developing/tools/proguard.html
 7 | 
 8 | # If your project uses WebView with JS, uncomment the following
 9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | #   public *;
13 | #}
14 | 
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 | 
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile


--------------------------------------------------------------------------------
/library/build.gradle:
--------------------------------------------------------------------------------
 1 | plugins {
 2 |     id 'com.android.library'
 3 |     id 'org.jetbrains.kotlin.android'
 4 | }
 5 | 
 6 | android {
 7 |     namespace 'com.github.mminng.itemvisibility'
 8 |     compileSdk 33
 9 | 
10 |     defaultConfig {
11 |         minSdk 21
12 |         targetSdk 33
13 | 
14 |         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
15 |         consumerProguardFiles "consumer-rules.pro"
16 |     }
17 | 
18 |     buildTypes {
19 |         release {
20 |             minifyEnabled false
21 |             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
22 |         }
23 |     }
24 |     compileOptions {
25 |         sourceCompatibility JavaVersion.VERSION_1_8
26 |         targetCompatibility JavaVersion.VERSION_1_8
27 |     }
28 |     kotlinOptions {
29 |         jvmTarget = '1.8'
30 |     }
31 | }
32 | 
33 | dependencies {
34 | 
35 |     compileOnly 'androidx.recyclerview:recyclerview:1.1.0'
36 | }


--------------------------------------------------------------------------------
/app/src/main/res/layout/activity_staggered_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:id="@+id/s_listview"
 6 |     android:layout_width="match_parent"
 7 |     android:layout_height="match_parent"
 8 |     android:clipToPadding="false"
 9 |     android:paddingStart="15dp"
10 |     android:paddingTop="5dp"
11 |     android:paddingEnd="5dp"
12 |     android:paddingBottom="15dp"
13 |     app:layoutManager="androidx.recyclerview.widget.StaggeredGridLayoutManager"
14 |     app:layout_constraintBottom_toBottomOf="parent"
15 |     app:layout_constraintEnd_toEndOf="parent"
16 |     app:layout_constraintStart_toStartOf="parent"
17 |     app:layout_constraintTop_toTopOf="parent"
18 |     app:spanCount="2"
19 |     tools:listitem="@layout/item_staggered_list" />


--------------------------------------------------------------------------------
/app/src/main/res/layout/activity_horizontal_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:layout_width="match_parent"
 6 |     android:layout_height="match_parent">
 7 | 
 8 |     <androidx.recyclerview.widget.RecyclerView
 9 |         android:id="@+id/h_listview"
10 |         android:layout_width="match_parent"
11 |         android:layout_height="wrap_content"
12 |         android:orientation="horizontal"
13 |         app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
14 |         app:layout_constraintBottom_toBottomOf="parent"
15 |         app:layout_constraintEnd_toEndOf="parent"
16 |         app:layout_constraintStart_toStartOf="parent"
17 |         app:layout_constraintTop_toTopOf="parent"
18 |         tools:listitem="@layout/item_horizontal_list" />
19 | </androidx.constraintlayout.widget.ConstraintLayout>


--------------------------------------------------------------------------------
/app/src/main/res/layout/item_grid_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:layout_width="match_parent"
 6 |     android:layout_height="wrap_content"
 7 |     android:layout_marginTop="10dp"
 8 |     android:layout_marginEnd="10dp">
 9 | 
10 |     <TextView
11 |         android:id="@+id/item_g_position"
12 |         android:layout_width="0dp"
13 |         android:layout_height="0dp"
14 |         android:background="#C0C0C0"
15 |         android:gravity="center"
16 |         android:textColor="#F40002"
17 |         android:textSize="16sp"
18 |         app:layout_constraintBottom_toBottomOf="parent"
19 |         app:layout_constraintDimensionRatio="1:1"
20 |         app:layout_constraintEnd_toEndOf="parent"
21 |         app:layout_constraintStart_toStartOf="parent"
22 |         app:layout_constraintTop_toTopOf="parent"
23 |         tools:text="Position" />
24 | </androidx.constraintlayout.widget.ConstraintLayout>


--------------------------------------------------------------------------------
/gradle.properties:
--------------------------------------------------------------------------------
 1 | # Project-wide Gradle settings.
 2 | # IDE (e.g. Android Studio) users:
 3 | # Gradle settings configured through the IDE *will override*
 4 | # any settings specified in this file.
 5 | # For more details on how to configure your build environment visit
 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html
 7 | # Specifies the JVM arguments used for the daemon process.
 8 | # The setting is particularly useful for tweaking memory settings.
 9 | org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
10 | # When configured, Gradle will run in incubating parallel mode.
11 | # This option should only be used with decoupled projects. More details, visit
12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
13 | # org.gradle.parallel=true
14 | # AndroidX package structure to make it clearer which packages are bundled with the
15 | # Android operating system, and which are packaged with your app's APK
16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn
17 | android.useAndroidX=true
18 | # Kotlin code style for this project: "official" or "obsolete":
19 | kotlin.code.style=official
20 | # Enables namespacing of each library's R class so that its R class includes only the
21 | # resources declared in the library itself and none from the library's dependencies,
22 | # thereby reducing the size of the R class for that library
23 | android.nonTransitiveRClass=true


--------------------------------------------------------------------------------
/app/src/main/res/layout/item_pager_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:tools="http://schemas.android.com/tools"
 4 |     android:layout_width="match_parent"
 5 |     android:layout_height="match_parent">
 6 | 
 7 |     <com.simple.itemvisibility.renderer.TextureRenderView
 8 |         android:id="@+id/item_p_renderer"
 9 |         android:layout_width="match_parent"
10 |         android:layout_height="match_parent"
11 |         android:layout_gravity="center" />
12 | 
13 |     <View
14 |         android:id="@+id/item_p_cover"
15 |         android:layout_width="match_parent"
16 |         android:layout_height="match_parent"
17 |         android:background="#C0C0C0" />
18 | 
19 |     <TextView
20 |         android:id="@+id/item_p_top_position"
21 |         android:layout_width="wrap_content"
22 |         android:layout_height="wrap_content"
23 |         android:background="#80000000"
24 |         android:paddingStart="6dp"
25 |         android:paddingEnd="6dp"
26 |         android:textColor="#F40002"
27 |         android:textSize="14sp"
28 |         tools:text="0" />
29 | 
30 |     <TextView
31 |         android:id="@+id/item_p_bottom_position"
32 |         android:layout_width="wrap_content"
33 |         android:layout_height="wrap_content"
34 |         android:layout_gravity="bottom|end"
35 |         android:background="#80000000"
36 |         android:paddingStart="6dp"
37 |         android:paddingEnd="6dp"
38 |         android:textColor="#F40002"
39 |         android:textSize="14sp"
40 |         tools:text="0" />
41 | </FrameLayout>


--------------------------------------------------------------------------------
/library/src/main/java/com/github/mminng/itemvisibility/listener/ItemStateChangeListener.kt:
--------------------------------------------------------------------------------
 1 | package com.github.mminng.itemvisibility.listener
 2 | 
 3 | import android.view.View
 4 | 
 5 | /**
 6 |  * Created by zh on 2023/4/27.
 7 |  */
 8 | class ItemStateChangeListener : OnItemStateChangeListener {
 9 | 
10 |     private var _activateItem: ((view: View, position: Int) -> Unit)? = null
11 |     private var _deactivateItem: ((view: View, position: Int) -> Unit)? = null
12 |     private var _pauseItem: ((view: View, position: Int) -> Unit)? = null
13 |     private var _resumeItem: ((view: View, position: Int) -> Unit)? = null
14 | 
15 |     override fun onActivateItem(view: View, position: Int) {
16 |         _activateItem?.invoke(view, position)
17 |     }
18 | 
19 |     override fun onDeactivateItem(view: View, position: Int) {
20 |         _deactivateItem?.invoke(view, position)
21 |     }
22 | 
23 |     override fun onPauseItem(view: View, position: Int) {
24 |         _pauseItem?.invoke(view, position)
25 |     }
26 | 
27 |     override fun onResumeItem(view: View, position: Int) {
28 |         _resumeItem?.invoke(view, position)
29 |     }
30 | 
31 |     fun activateItem(listener: (view: View, position: Int) -> Unit) {
32 |         _activateItem = listener
33 |     }
34 | 
35 |     fun deactivateItem(listener: (view: View, position: Int) -> Unit) {
36 |         _deactivateItem = listener
37 |     }
38 | 
39 |     fun pauseItem(listener: (view: View, position: Int) -> Unit) {
40 |         _pauseItem = listener
41 |     }
42 | 
43 |     fun resumeItem(listener: (view: View, position: Int) -> Unit) {
44 |         _resumeItem = listener
45 |     }
46 | }


--------------------------------------------------------------------------------
/app/build.gradle:
--------------------------------------------------------------------------------
 1 | plugins {
 2 |     id 'com.android.application'
 3 |     id 'org.jetbrains.kotlin.android'
 4 | }
 5 | 
 6 | android {
 7 |     namespace 'com.simple.itemvisibility'
 8 |     compileSdk 33
 9 | 
10 |     defaultConfig {
11 |         applicationId "com.simple.itemvisibility"
12 |         minSdk 21
13 |         targetSdk 33
14 |         versionCode 1
15 |         versionName "1.0"
16 | 
17 |         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
18 |     }
19 |     viewBinding {
20 |         enabled = true
21 |     }
22 |     buildTypes {
23 |         release {
24 |             minifyEnabled false
25 |             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
26 |         }
27 |     }
28 |     compileOptions {
29 |         sourceCompatibility JavaVersion.VERSION_1_8
30 |         targetCompatibility JavaVersion.VERSION_1_8
31 |     }
32 |     kotlinOptions {
33 |         jvmTarget = '1.8'
34 |     }
35 | }
36 | 
37 | dependencies {
38 | 
39 |     implementation 'androidx.core:core-ktx:1.8.0'
40 |     implementation 'androidx.appcompat:appcompat:1.4.1'
41 |     implementation 'com.google.android.material:material:1.5.0'
42 |     implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
43 |     implementation project(path: ':library')
44 |     testImplementation 'junit:junit:4.13.2'
45 |     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
46 |     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
47 | 
48 |     implementation 'com.google.android.flexbox:flexbox:3.0.0'
49 |     debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.10'
50 | }


--------------------------------------------------------------------------------
/app/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:tools="http://schemas.android.com/tools">
 4 | 
 5 |     <uses-permission android:name="android.permission.INTERNET" />
 6 | 
 7 |     <application
 8 |         android:allowBackup="true"
 9 |         android:dataExtractionRules="@xml/data_extraction_rules"
10 |         android:fullBackupContent="@xml/backup_rules"
11 |         android:icon="@mipmap/ic_launcher"
12 |         android:label="@string/app_name"
13 |         android:roundIcon="@mipmap/ic_launcher_round"
14 |         android:supportsRtl="true"
15 |         android:theme="@style/Theme.ItemVisibility"
16 |         tools:targetApi="31">
17 |         <activity
18 |             android:name=".MainActivity"
19 |             android:exported="true">
20 |             <intent-filter>
21 |                 <action android:name="android.intent.action.MAIN" />
22 | 
23 |                 <category android:name="android.intent.category.LAUNCHER" />
24 |             </intent-filter>
25 |         </activity>
26 |         <activity android:name="com.simple.itemvisibility.horizontallist.HorizontalListActivity" />
27 |         <activity android:name="com.simple.itemvisibility.verticallist.VerticalListActivity" />
28 |         <activity android:name="com.simple.itemvisibility.pager.PagerListActivity" />
29 |         <activity android:name="com.simple.itemvisibility.gird.GridListActivity" />
30 |         <activity android:name="com.simple.itemvisibility.staggered.StaggeredListActivity" />
31 |         <activity android:name="com.simple.itemvisibility.flex.FlexListActivity" />
32 |     </application>
33 | 
34 | </manifest>


--------------------------------------------------------------------------------
/app/src/main/res/layout/item_staggered_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:tools="http://schemas.android.com/tools"
 4 |     android:layout_width="match_parent"
 5 |     android:layout_height="wrap_content"
 6 |     android:layout_marginTop="10dp"
 7 |     android:layout_marginEnd="10dp"
 8 |     android:orientation="vertical">
 9 | 
10 |     <FrameLayout
11 |         android:id="@+id/item_s_player_view"
12 |         android:layout_width="match_parent"
13 |         android:layout_height="200dp"
14 |         android:background="@color/black">
15 | 
16 |         <com.simple.itemvisibility.renderer.TextureRenderView
17 |             android:id="@+id/item_s_renderer"
18 |             android:layout_width="match_parent"
19 |             android:layout_height="match_parent"
20 |             android:layout_gravity="center" />
21 | 
22 |         <View
23 |             android:id="@+id/item_s_cover"
24 |             android:layout_width="match_parent"
25 |             android:layout_height="match_parent"
26 |             android:background="#C0C0C0" />
27 | 
28 |         <View
29 |             android:layout_width="match_parent"
30 |             android:layout_height="1px"
31 |             android:layout_gravity="center"
32 |             android:background="#F40002" />
33 |     </FrameLayout>
34 | 
35 |     <TextView
36 |         android:id="@+id/item_s_position"
37 |         android:layout_width="match_parent"
38 |         android:layout_height="120dp"
39 |         android:background="#345788"
40 |         android:gravity="center"
41 |         android:textColor="@color/white"
42 |         android:textSize="14sp"
43 |         tools:text="Position" />
44 | </LinearLayout>


--------------------------------------------------------------------------------
/app/src/main/res/layout/item_horizontal_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:tools="http://schemas.android.com/tools"
 4 |     android:layout_width="300dp"
 5 |     android:layout_height="169dp">
 6 | 
 7 |     <com.simple.itemvisibility.renderer.TextureRenderView
 8 |         android:id="@+id/item_h_renderer"
 9 |         android:layout_width="match_parent"
10 |         android:layout_height="match_parent"
11 |         android:layout_gravity="center" />
12 | 
13 |     <View
14 |         android:id="@+id/item_h_cover"
15 |         android:layout_width="match_parent"
16 |         android:layout_height="match_parent"
17 |         android:background="#C0C0C0" />
18 | 
19 |     <View
20 |         android:layout_width="1px"
21 |         android:layout_height="match_parent"
22 |         android:layout_gravity="center_horizontal"
23 |         android:background="#F40002" />
24 | 
25 |     <TextView
26 |         android:id="@+id/item_h_top_position"
27 |         android:layout_width="wrap_content"
28 |         android:layout_height="wrap_content"
29 |         android:background="#80000000"
30 |         android:paddingStart="6dp"
31 |         android:paddingEnd="6dp"
32 |         android:textColor="#F40002"
33 |         android:textSize="14sp"
34 |         tools:text="0" />
35 | 
36 |     <TextView
37 |         android:id="@+id/item_h_bottom_position"
38 |         android:layout_width="wrap_content"
39 |         android:layout_height="wrap_content"
40 |         android:layout_gravity="bottom|end"
41 |         android:background="#80000000"
42 |         android:paddingStart="6dp"
43 |         android:paddingEnd="6dp"
44 |         android:textColor="#F40002"
45 |         android:textSize="14sp"
46 |         tools:text="0" />
47 | </FrameLayout>


--------------------------------------------------------------------------------
/app/src/main/res/drawable-v24/ic_launcher_foreground.xml:
--------------------------------------------------------------------------------
 1 | <vector xmlns:android="http://schemas.android.com/apk/res/android"
 2 |     xmlns:aapt="http://schemas.android.com/aapt"
 3 |     android:width="108dp"
 4 |     android:height="108dp"
 5 |     android:viewportWidth="108"
 6 |     android:viewportHeight="108">
 7 |     <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
 8 |         <aapt:attr name="android:fillColor">
 9 |             <gradient
10 |                 android:endX="85.84757"
11 |                 android:endY="92.4963"
12 |                 android:startX="42.9492"
13 |                 android:startY="49.59793"
14 |                 android:type="linear">
15 |                 <item
16 |                     android:color="#44000000"
17 |                     android:offset="0.0" />
18 |                 <item
19 |                     android:color="#00000000"
20 |                     android:offset="1.0" />
21 |             </gradient>
22 |         </aapt:attr>
23 |     </path>
24 |     <path
25 |         android:fillColor="#FFFFFF"
26 |         android:fillType="nonZero"
27 |         android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
28 |         android:strokeWidth="1"
29 |         android:strokeColor="#00000000" />
30 | </vector>


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/MainActivity.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility
 2 | 
 3 | import android.content.Intent
 4 | import androidx.appcompat.app.AppCompatActivity
 5 | import android.os.Bundle
 6 | import com.simple.itemvisibility.databinding.ActivityMainBinding
 7 | import com.simple.itemvisibility.flex.FlexListActivity
 8 | import com.simple.itemvisibility.gird.GridListActivity
 9 | import com.simple.itemvisibility.horizontallist.HorizontalListActivity
10 | import com.simple.itemvisibility.pager.PagerListActivity
11 | import com.simple.itemvisibility.staggered.StaggeredListActivity
12 | import com.simple.itemvisibility.verticallist.VerticalListActivity
13 | 
14 | class MainActivity : AppCompatActivity() {
15 | 
16 |     override fun onCreate(savedInstanceState: Bundle?) {
17 |         super.onCreate(savedInstanceState)
18 |         val binding = ActivityMainBinding.inflate(layoutInflater)
19 |         setContentView(binding.root)
20 | 
21 |         binding.vertical.setOnClickListener {
22 |             startActivity(Intent(this@MainActivity, VerticalListActivity::class.java))
23 |         }
24 |         binding.horizontal.setOnClickListener {
25 |             startActivity(Intent(this@MainActivity, HorizontalListActivity::class.java))
26 |         }
27 |         binding.grid.setOnClickListener {
28 |             startActivity(Intent(this@MainActivity, GridListActivity::class.java))
29 |         }
30 |         binding.staggered.setOnClickListener {
31 |             startActivity(Intent(this@MainActivity, StaggeredListActivity::class.java))
32 |         }
33 |         binding.pager.setOnClickListener {
34 |             startActivity(Intent(this@MainActivity, PagerListActivity::class.java))
35 |         }
36 |         binding.flex.setOnClickListener {
37 |             startActivity(Intent(this@MainActivity, FlexListActivity::class.java))
38 |         }
39 |     }
40 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/pager/PagerListAdapter.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.pager
 2 | 
 3 | import android.view.LayoutInflater
 4 | import android.view.ViewGroup
 5 | import androidx.recyclerview.widget.RecyclerView
 6 | import com.simple.itemvisibility.databinding.ItemPagerListBinding
 7 | 
 8 | /**
 9 |  * Created by zh on 2023/4/27.
10 |  */
11 | class PagerListAdapter constructor(private val data: List<String>) :
12 |     RecyclerView.Adapter<ViewHolder>() {
13 | 
14 |     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
15 |         val binding: ItemPagerListBinding =
16 |             ItemPagerListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
17 |         val holder = ViewHolder(binding)
18 |         bindItemClick(holder)
19 |         return holder
20 |     }
21 | 
22 |     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
23 |         holder.itemView.tag = data[position]
24 |         holder.bind(position)
25 |     }
26 | 
27 |     override fun getItemCount(): Int = data.size
28 | 
29 |     fun setOnItemClickListener(listener: (item: String, position: Int) -> Unit) {
30 |         _itemClick = listener
31 |     }
32 | 
33 |     private var _itemClick: ((item: String, position: Int) -> Unit)? = null
34 | 
35 |     private fun bindItemClick(holder: ViewHolder) {
36 |         holder.itemView.setOnClickListener {
37 |             _itemClick?.let {
38 |                 val position = holder.adapterPosition
39 |                 if (position == RecyclerView.NO_POSITION) return@setOnClickListener
40 |                 val data: String = holder.itemView.tag as String
41 |                 it.invoke(data, position)
42 |             }
43 |         }
44 |     }
45 | }
46 | 
47 | class ViewHolder constructor(private val binding: ItemPagerListBinding) :
48 |     RecyclerView.ViewHolder(binding.root) {
49 | 
50 |     fun bind(position: Int) {
51 |         binding.itemPTopPosition.text = "$position"
52 |         binding.itemPBottomPosition.text = "$position"
53 |     }
54 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/verticallist/VerticalListAdapter.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.verticallist
 2 | 
 3 | import android.view.LayoutInflater
 4 | import android.view.ViewGroup
 5 | import androidx.recyclerview.widget.RecyclerView
 6 | import com.simple.itemvisibility.databinding.ItemVerticalListBinding
 7 | 
 8 | /**
 9 |  * Created by zh on 2023/4/27.
10 |  */
11 | class VerticalListAdapter constructor(private val data: List<String>) :
12 |     RecyclerView.Adapter<ViewHolder>() {
13 | 
14 |     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
15 |         val binding: ItemVerticalListBinding =
16 |             ItemVerticalListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
17 |         val holder = ViewHolder(binding)
18 |         bindItemClick(holder)
19 |         return holder
20 |     }
21 | 
22 |     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
23 |         holder.itemView.tag = data[position]
24 |         holder.bind(position)
25 |     }
26 | 
27 |     override fun getItemCount(): Int = data.size
28 | 
29 |     fun setOnItemClickListener(listener: (item: String, position: Int) -> Unit) {
30 |         _itemClick = listener
31 |     }
32 | 
33 |     private var _itemClick: ((item: String, position: Int) -> Unit)? = null
34 | 
35 |     private fun bindItemClick(holder: ViewHolder) {
36 |         holder.itemView.setOnClickListener {
37 |             _itemClick?.let {
38 |                 val position = holder.adapterPosition
39 |                 if (position == RecyclerView.NO_POSITION) return@setOnClickListener
40 |                 val data: String = holder.itemView.tag as String
41 |                 it.invoke(data, position)
42 |             }
43 |         }
44 |     }
45 | }
46 | 
47 | class ViewHolder constructor(private val binding: ItemVerticalListBinding) :
48 |     RecyclerView.ViewHolder(binding.root) {
49 | 
50 |     fun bind(position: Int) {
51 |         binding.itemVTopPosition.text = "$position"
52 |         binding.itemVBottomPosition.text = "$position"
53 |     }
54 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/horizontallist/HorizontalListAdapter.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.horizontallist
 2 | 
 3 | import android.view.LayoutInflater
 4 | import android.view.ViewGroup
 5 | import androidx.recyclerview.widget.RecyclerView
 6 | import com.simple.itemvisibility.databinding.ItemHorizontalListBinding
 7 | 
 8 | /**
 9 |  * Created by zh on 2023/4/27.
10 |  */
11 | class HorizontalListAdapter constructor(private val data: List<String>) :
12 |     RecyclerView.Adapter<ViewHolder>() {
13 | 
14 |     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
15 |         val binding: ItemHorizontalListBinding =
16 |             ItemHorizontalListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
17 |         val holder = ViewHolder(binding)
18 |         bindItemClick(holder)
19 |         return holder
20 |     }
21 | 
22 |     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
23 |         holder.itemView.tag = data[position]
24 |         holder.bind(data[position], position)
25 |     }
26 | 
27 |     override fun getItemCount(): Int = data.size
28 | 
29 |     fun setOnItemClickListener(listener: (item: String, position: Int) -> Unit) {
30 |         _itemClick = listener
31 |     }
32 | 
33 |     private var _itemClick: ((item: String, position: Int) -> Unit)? = null
34 | 
35 |     private fun bindItemClick(holder: ViewHolder) {
36 |         holder.itemView.setOnClickListener {
37 |             _itemClick?.let {
38 |                 val position = holder.adapterPosition
39 |                 if (position == RecyclerView.NO_POSITION) return@setOnClickListener
40 |                 val data: String = holder.itemView.tag as String
41 |                 it.invoke(data, position)
42 |             }
43 |         }
44 |     }
45 | }
46 | 
47 | class ViewHolder constructor(private val binding: ItemHorizontalListBinding) :
48 |     RecyclerView.ViewHolder(binding.root) {
49 | 
50 |     fun bind(url: String, position: Int) {
51 |         binding.itemHTopPosition.text = "$position"
52 |         binding.itemHBottomPosition.text = "$position"
53 |     }
54 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/flex/FlexListAdapter.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.flex
 2 | 
 3 | import android.view.LayoutInflater
 4 | import android.view.ViewGroup
 5 | import androidx.recyclerview.widget.RecyclerView
 6 | import com.simple.itemvisibility.databinding.ItemFlexListBinding
 7 | 
 8 | /**
 9 |  * Created by zh on 2023/4/27.
10 |  */
11 | class FlexListAdapter constructor(private val data: List<ListModel>) :
12 |     RecyclerView.Adapter<ViewHolder>() {
13 | 
14 |     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
15 |         val binding: ItemFlexListBinding =
16 |             ItemFlexListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
17 |         val holder = ViewHolder(binding)
18 |         bindItemClick(holder)
19 |         return holder
20 |     }
21 | 
22 |     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
23 |         holder.itemView.tag = data[position]
24 |         holder.bind(data[position], position)
25 |     }
26 | 
27 |     override fun getItemCount(): Int = data.size
28 | 
29 |     fun setOnItemClickListener(listener: (item: ListModel, position: Int) -> Unit) {
30 |         _itemClick = listener
31 |     }
32 | 
33 |     private var _itemClick: ((item: ListModel, position: Int) -> Unit)? = null
34 | 
35 |     private fun bindItemClick(holder: ViewHolder) {
36 |         holder.itemView.setOnClickListener {
37 |             _itemClick?.let {
38 |                 val position = holder.adapterPosition
39 |                 if (position == RecyclerView.NO_POSITION) return@setOnClickListener
40 |                 val data: ListModel = holder.itemView.tag as ListModel
41 |                 it.invoke(data, position)
42 |             }
43 |         }
44 |     }
45 | }
46 | 
47 | class ViewHolder constructor(private val binding: ItemFlexListBinding) :
48 |     RecyclerView.ViewHolder(binding.root) {
49 | 
50 |     fun bind(item: ListModel, position: Int) {
51 |         binding.itemFTopPosition.text = "$position"
52 |         binding.itemFBottomPosition.text = "$position"
53 |         binding.itemFTitle.text = item.title
54 |     }
55 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/staggered/StaggeredListAdapter.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.staggered
 2 | 
 3 | import android.view.LayoutInflater
 4 | import android.view.ViewGroup
 5 | import androidx.recyclerview.widget.RecyclerView
 6 | import com.simple.itemvisibility.databinding.ItemStaggeredListBinding
 7 | 
 8 | /**
 9 |  * Created by zh on 2023/4/27.
10 |  */
11 | class StaggeredListAdapter constructor(private val data: List<ListModel>) :
12 |     RecyclerView.Adapter<ViewHolder>() {
13 | 
14 |     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
15 |         val binding: ItemStaggeredListBinding =
16 |             ItemStaggeredListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
17 |         val holder = ViewHolder(binding)
18 |         bindItemClick(holder)
19 |         return holder
20 |     }
21 | 
22 |     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
23 |         holder.itemView.tag = data[position]
24 |         holder.bind(data[position].height, position)
25 |     }
26 | 
27 |     override fun getItemCount(): Int = data.size
28 | 
29 |     fun setOnItemClickListener(listener: (item: ListModel, position: Int) -> Unit) {
30 |         _itemClick = listener
31 |     }
32 | 
33 |     private var _itemClick: ((item: ListModel, position: Int) -> Unit)? = null
34 | 
35 |     private fun bindItemClick(holder: ViewHolder) {
36 |         holder.itemView.setOnClickListener {
37 |             _itemClick?.let {
38 |                 val position = holder.adapterPosition
39 |                 if (position == RecyclerView.NO_POSITION) return@setOnClickListener
40 |                 val data: ListModel = holder.itemView.tag as ListModel
41 |                 it.invoke(data, position)
42 |             }
43 |         }
44 |     }
45 | }
46 | 
47 | class ViewHolder constructor(private val binding: ItemStaggeredListBinding) :
48 |     RecyclerView.ViewHolder(binding.root) {
49 | 
50 |     fun bind(height: Int, position: Int) {
51 |         binding.itemSPosition.text = "$position"
52 |         val layoutParams: ViewGroup.LayoutParams = binding.itemSPosition.layoutParams
53 |         layoutParams.height = height
54 |         binding.itemSPosition.layoutParams = layoutParams
55 |     }
56 | }


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # ItemVisibilityHelper [![](https://jitpack.io/v/mminng/item-visibility-helper.svg)](https://jitpack.io/#mminng/item-visibility-helper)
 2 | 
 3 | Item visibility helper for RecyclerView.  
 4 | Help implement video playlist, like Facebook, TikTok etc.  
 5 | Or other features.
 6 | 
 7 | # Screenshot
 8 | 
 9 | ![screenshot](https://github.com/mminng/item-visibility-helper/blob/master/screenshots/simple.gif)
10 | 
11 | # Getting Started
12 | 
13 | **Step 1.** Add it in your root build.gradle at the end of repositories:
14 | 
15 | ```Groovy
16 | allprojects {
17 |     repositories {
18 |         ...
19 |         maven { url 'https://jitpack.io' }
20 |     }
21 | }
22 | ```
23 | 
24 | **Step 2.** Add the dependency:
25 | 
26 | ```Groovy
27 | dependencies {
28 |     ...
29 |     implementation 'com.github.mminng:item-visibility-helper:1.0.3'
30 | }
31 | ```
32 | 
33 | # Usage
34 | 
35 | ```Kotlin
36 | val helper: ItemVisibilityHelper = ItemVisibilityHelper()
37 | //Attach to RecyclerView.
38 | helper.attachToRecyclerView(recyclerView: RecyclerView,
39 |                             targetViewId: Int = View.NO_ID,
40 |                             autoActivate: Boolean = true,
41 |                             orientation: Int = RecyclerView.VERTICAL,
42 |                             reverseLayout: Boolean = false){
43 |     activateItem { view, position ->
44 |         //Item activated.
45 |     }
46 |     deactivateItem { view, position ->
47 |         //Item deactivated.
48 |     }
49 |     pauseItem { view, position ->
50 |         //Item paused.
51 |     }
52 |     resumeItem { view, position ->
53 |         //Item resumed.
54 |     }
55 | }
56 | //Activate most visible item.
57 | helper.activateItem()
58 | //Activate item by position.
59 | helper.activateItem(position: Int)
60 | //Deactivate item.
61 | helper.deactivateItem()
62 | ```
63 | 
64 | # License
65 | 
66 | ```markdown
67 | Copyright 2023 mminng
68 | 
69 | Licensed under the Apache License, Version 2.0 (the "License");
70 | you may not use this file except in compliance with the License.
71 | You may obtain a copy of the License at
72 | 
73 | http://www.apache.org/licenses/LICENSE-2.0
74 | 
75 | Unless required by applicable law or agreed to in writing, software
76 | distributed under the License is distributed on an "AS IS" BASIS,
77 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
78 | See the License for the specific language governing permissions and
79 | limitations under the License.
80 | ```
81 | 


--------------------------------------------------------------------------------
/app/src/main/res/layout/item_flex_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:layout_width="wrap_content"
 6 |     android:layout_height="wrap_content"
 7 |     android:layout_marginEnd="15dp"
 8 |     android:layout_marginBottom="15dp"
 9 |     android:orientation="vertical">
10 | 
11 |     <androidx.cardview.widget.CardView
12 |         android:id="@+id/item_f_player_view"
13 |         android:layout_width="match_parent"
14 |         android:layout_height="170dp"
15 |         app:cardCornerRadius="6dp"
16 |         app:cardElevation="0dp">
17 | 
18 |         <com.simple.itemvisibility.renderer.TextureRenderView
19 |             android:id="@+id/item_f_renderer"
20 |             android:layout_width="match_parent"
21 |             android:layout_height="match_parent"
22 |             android:layout_gravity="center" />
23 | 
24 |         <View
25 |             android:id="@+id/item_f_cover"
26 |             android:layout_width="match_parent"
27 |             android:layout_height="wrap_content"
28 |             android:background="#C0C0C0" />
29 | 
30 |         <TextView
31 |             android:id="@+id/item_f_top_position"
32 |             android:layout_width="wrap_content"
33 |             android:layout_height="wrap_content"
34 |             android:background="#80000000"
35 |             android:paddingStart="6dp"
36 |             android:paddingEnd="6dp"
37 |             android:textColor="#F40002"
38 |             android:textSize="14sp"
39 |             tools:text="0" />
40 | 
41 |         <View
42 |             android:layout_width="match_parent"
43 |             android:layout_height="1px"
44 |             android:layout_gravity="center_vertical"
45 |             android:background="#F40002" />
46 | 
47 |         <TextView
48 |             android:id="@+id/item_f_bottom_position"
49 |             android:layout_width="wrap_content"
50 |             android:layout_height="wrap_content"
51 |             android:layout_gravity="bottom|end"
52 |             android:background="#80000000"
53 |             android:paddingStart="6dp"
54 |             android:paddingEnd="6dp"
55 |             android:textColor="#F40002"
56 |             android:textSize="14sp"
57 |             tools:text="0" />
58 |     </androidx.cardview.widget.CardView>
59 | 
60 |     <TextView
61 |         android:id="@+id/item_f_title"
62 |         android:layout_width="wrap_content"
63 |         android:layout_height="wrap_content"
64 |         tools:text="TextTextText" />
65 | </LinearLayout>


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/renderer/TextureRenderView.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.renderer
 2 | 
 3 | import android.content.Context
 4 | import android.util.AttributeSet
 5 | import android.util.Pair
 6 | import android.view.TextureView
 7 | import kotlin.math.abs
 8 | 
 9 | /**
10 |  * Created by zh on 2023/4/20.
11 |  */
12 | class TextureRenderView @JvmOverloads constructor(
13 |     context: Context, attrs: AttributeSet? = null
14 | ) : TextureView(context, attrs) {
15 | 
16 |     private var _videoWidth: Int = 0
17 |     private var _videoHeight: Int = 0
18 |     private var _zoom: Boolean = false
19 | 
20 |     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
21 |         super.onMeasure(widthMeasureSpec, heightMeasureSpec)
22 |         val size: Pair<Int, Int> = resize(
23 |             _videoWidth.toFloat(),
24 |             _videoHeight.toFloat(),
25 |             measuredWidth.toFloat(),
26 |             measuredHeight.toFloat()
27 |         )
28 |         if (size.first == 0 || size.second == 0) return
29 |         super.onMeasure(
30 |             MeasureSpec.makeMeasureSpec(size.first, MeasureSpec.EXACTLY),
31 |             MeasureSpec.makeMeasureSpec(size.second, MeasureSpec.EXACTLY)
32 |         )
33 |     }
34 | 
35 |     fun setVideoSize(width: Int, height: Int, zoom: Boolean) {
36 |         if (_videoWidth != width || _videoHeight != height) {
37 |             _videoWidth = width
38 |             _videoHeight = height
39 |             _zoom = zoom
40 |             requestLayout()
41 |         }
42 |     }
43 | 
44 |     private fun resize(
45 |         videoWidth: Float,
46 |         videoHeight: Float,
47 |         measuredWidth: Float,
48 |         measuredHeight: Float
49 |     ): Pair<Int, Int> {
50 |         if (videoWidth == 0.0F || videoHeight == 0.0F) return Pair.create(0, 0)
51 | 
52 |         var width: Float = measuredWidth
53 |         var height: Float = measuredHeight
54 |         val viewAspectRatio: Float = width / height
55 |         val videoAspectRatio: Float = videoWidth / videoHeight
56 |         val difference: Float = videoAspectRatio / viewAspectRatio - 1
57 |         if (abs(difference) <= 0.01F) return Pair.create(0, 0)
58 |         if (_zoom) {
59 |             if (difference > 0) {
60 |                 width = height * videoAspectRatio
61 |             } else {
62 |                 height = width / videoAspectRatio
63 |             }
64 |         } else {
65 |             if (difference > 0) {
66 |                 height = width / videoAspectRatio
67 |             } else {
68 |                 width = height * videoAspectRatio
69 |             }
70 |         }
71 |         return Pair.create(width.toInt(), height.toInt())
72 |     }
73 | }


--------------------------------------------------------------------------------
/app/src/main/res/layout/activity_main.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:layout_width="match_parent"
 6 |     android:layout_height="match_parent"
 7 |     android:gravity="center"
 8 |     android:orientation="vertical"
 9 |     tools:context=".MainActivity">
10 | 
11 |     <Button
12 |         android:id="@+id/vertical"
13 |         android:layout_width="wrap_content"
14 |         android:layout_height="wrap_content"
15 |         android:text="Vertical List"
16 |         app:layout_constraintBottom_toTopOf="@+id/guideline2"
17 |         app:layout_constraintEnd_toEndOf="parent"
18 |         app:layout_constraintStart_toStartOf="parent" />
19 | 
20 |     <Button
21 |         android:id="@+id/horizontal"
22 |         android:layout_width="wrap_content"
23 |         android:layout_height="wrap_content"
24 |         android:layout_marginTop="10dp"
25 |         android:text="Horizontal List"
26 |         app:layout_constraintEnd_toEndOf="parent"
27 |         app:layout_constraintStart_toStartOf="parent"
28 |         app:layout_constraintTop_toTopOf="@+id/guideline2" />
29 | 
30 |     <Button
31 |         android:id="@+id/grid"
32 |         android:layout_width="wrap_content"
33 |         android:layout_height="wrap_content"
34 |         android:layout_marginTop="10dp"
35 |         android:text="Grid List"
36 |         app:layout_constraintEnd_toEndOf="parent"
37 |         app:layout_constraintStart_toStartOf="parent"
38 |         app:layout_constraintTop_toTopOf="@+id/guideline2" />
39 | 
40 |     <Button
41 |         android:id="@+id/staggered"
42 |         android:layout_width="wrap_content"
43 |         android:layout_height="wrap_content"
44 |         android:layout_marginTop="10dp"
45 |         android:text="Staggered List"
46 |         app:layout_constraintEnd_toEndOf="parent"
47 |         app:layout_constraintStart_toStartOf="parent"
48 |         app:layout_constraintTop_toTopOf="@+id/guideline2" />
49 | 
50 |     <Button
51 |         android:id="@+id/pager"
52 |         android:layout_width="wrap_content"
53 |         android:layout_height="wrap_content"
54 |         android:layout_marginTop="10dp"
55 |         android:text="Pager List"
56 |         app:layout_constraintEnd_toEndOf="parent"
57 |         app:layout_constraintStart_toStartOf="parent"
58 |         app:layout_constraintTop_toBottomOf="@+id/horizontal" />
59 | 
60 |     <Button
61 |         android:id="@+id/flex"
62 |         android:layout_width="wrap_content"
63 |         android:layout_height="wrap_content"
64 |         android:layout_marginTop="10dp"
65 |         android:text="Flex List"
66 |         app:layout_constraintEnd_toEndOf="parent"
67 |         app:layout_constraintStart_toStartOf="parent"
68 |         app:layout_constraintTop_toBottomOf="@+id/horizontal" />
69 | </LinearLayout>


--------------------------------------------------------------------------------
/app/src/main/res/layout/item_vertical_list.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:layout_width="match_parent"
 6 |     android:layout_height="wrap_content">
 7 | 
 8 |     <FrameLayout
 9 |         android:id="@+id/item_v_player_view"
10 |         android:layout_width="0dp"
11 |         android:layout_height="0dp"
12 |         app:layout_constraintBottom_toBottomOf="parent"
13 |         app:layout_constraintDimensionRatio="16:9"
14 |         app:layout_constraintEnd_toEndOf="parent"
15 |         app:layout_constraintStart_toStartOf="parent"
16 |         app:layout_constraintTop_toTopOf="parent">
17 | 
18 |         <com.simple.itemvisibility.renderer.TextureRenderView
19 |             android:id="@+id/item_v_renderer"
20 |             android:layout_width="match_parent"
21 |             android:layout_height="match_parent" />
22 |     </FrameLayout>
23 | 
24 |     <View
25 |         android:id="@+id/item_v_cover"
26 |         android:layout_width="0dp"
27 |         android:layout_height="0dp"
28 |         android:background="#C0C0C0"
29 |         app:layout_constraintBottom_toBottomOf="parent"
30 |         app:layout_constraintDimensionRatio="16:9"
31 |         app:layout_constraintEnd_toEndOf="parent"
32 |         app:layout_constraintStart_toStartOf="parent"
33 |         app:layout_constraintTop_toTopOf="parent" />
34 | 
35 |     <View
36 |         android:layout_width="0dp"
37 |         android:layout_height="1px"
38 |         android:background="#F40002"
39 |         app:layout_constraintBottom_toBottomOf="parent"
40 |         app:layout_constraintEnd_toEndOf="parent"
41 |         app:layout_constraintStart_toStartOf="parent"
42 |         app:layout_constraintTop_toTopOf="parent" />
43 | 
44 |     <TextView
45 |         android:id="@+id/item_v_top_position"
46 |         android:layout_width="wrap_content"
47 |         android:layout_height="wrap_content"
48 |         android:background="#80000000"
49 |         android:paddingStart="6dp"
50 |         android:paddingEnd="6dp"
51 |         android:textColor="#F40002"
52 |         android:textSize="14sp"
53 |         app:layout_constraintStart_toStartOf="parent"
54 |         app:layout_constraintTop_toTopOf="parent"
55 |         tools:text="0" />
56 | 
57 |     <TextView
58 |         android:id="@+id/item_v_bottom_position"
59 |         android:layout_width="wrap_content"
60 |         android:layout_height="wrap_content"
61 |         android:background="#80000000"
62 |         android:paddingStart="6dp"
63 |         android:paddingEnd="6dp"
64 |         android:textColor="#F40002"
65 |         android:textSize="14sp"
66 |         app:layout_constraintBottom_toBottomOf="parent"
67 |         app:layout_constraintEnd_toEndOf="parent"
68 |         tools:text="0" />
69 | </androidx.constraintlayout.widget.ConstraintLayout>


--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
 1 | @rem
 2 | @rem Copyright 2015 the original author or authors.
 3 | @rem
 4 | @rem Licensed under the Apache License, Version 2.0 (the "License");
 5 | @rem you may not use this file except in compliance with the License.
 6 | @rem You may obtain a copy of the License at
 7 | @rem
 8 | @rem      https://www.apache.org/licenses/LICENSE-2.0
 9 | @rem
10 | @rem Unless required by applicable law or agreed to in writing, software
11 | @rem distributed under the License is distributed on an "AS IS" BASIS,
12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | @rem See the License for the specific language governing permissions and
14 | @rem limitations under the License.
15 | @rem
16 | 
17 | @if "%DEBUG%" == "" @echo off
18 | @rem ##########################################################################
19 | @rem
20 | @rem  Gradle startup script for Windows
21 | @rem
22 | @rem ##########################################################################
23 | 
24 | @rem Set local scope for the variables with windows NT shell
25 | if "%OS%"=="Windows_NT" setlocal
26 | 
27 | set DIRNAME=%~dp0
28 | if "%DIRNAME%" == "" set DIRNAME=.
29 | set APP_BASE_NAME=%~n0
30 | set APP_HOME=%DIRNAME%
31 | 
32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter.
33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
34 | 
35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
37 | 
38 | @rem Find java.exe
39 | if defined JAVA_HOME goto findJavaFromJavaHome
40 | 
41 | set JAVA_EXE=java.exe
42 | %JAVA_EXE% -version >NUL 2>&1
43 | if "%ERRORLEVEL%" == "0" goto execute
44 | 
45 | echo.
46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
47 | echo.
48 | echo Please set the JAVA_HOME variable in your environment to match the
49 | echo location of your Java installation.
50 | 
51 | goto fail
52 | 
53 | :findJavaFromJavaHome
54 | set JAVA_HOME=%JAVA_HOME:"=%
55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
56 | 
57 | if exist "%JAVA_EXE%" goto execute
58 | 
59 | echo.
60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
61 | echo.
62 | echo Please set the JAVA_HOME variable in your environment to match the
63 | echo location of your Java installation.
64 | 
65 | goto fail
66 | 
67 | :execute
68 | @rem Setup the command line
69 | 
70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
71 | 
72 | 
73 | @rem Execute Gradle
74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
75 | 
76 | :end
77 | @rem End local scope for the variables with windows NT shell
78 | if "%ERRORLEVEL%"=="0" goto mainEnd
79 | 
80 | :fail
81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
82 | rem the _cmd.exe /c_ return code!
83 | if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
84 | exit /b 1
85 | 
86 | :mainEnd
87 | if "%OS%"=="Windows_NT" endlocal
88 | 
89 | :omega
90 | 


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/gird/GridListAdapter.kt:
--------------------------------------------------------------------------------
 1 | package com.simple.itemvisibility.gird
 2 | 
 3 | import android.view.LayoutInflater
 4 | import android.view.ViewGroup
 5 | import androidx.recyclerview.widget.RecyclerView
 6 | import androidx.viewbinding.ViewBinding
 7 | import com.simple.itemvisibility.databinding.ItemGridListBinding
 8 | import com.simple.itemvisibility.databinding.ItemGridVideoBinding
 9 | 
10 | /**
11 |  * Created by zh on 2023/4/27.
12 |  */
13 | class GridListAdapter constructor(private val data: List<ListModel>) :
14 |     RecyclerView.Adapter<RecyclerView.ViewHolder>() {
15 | 
16 |     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
17 |         val binding: ViewBinding
18 |         val holder: RecyclerView.ViewHolder
19 |         if (viewType == 0) {
20 |             binding =
21 |                 ItemGridVideoBinding.inflate(LayoutInflater.from(parent.context), parent, false)
22 |             holder = VideoViewHolder(binding)
23 |         } else {
24 |             binding =
25 |                 ItemGridListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
26 |             holder = ListViewHolder(binding)
27 |         }
28 |         bindItemClick(holder)
29 |         return holder
30 |     }
31 | 
32 |     override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
33 |         holder.itemView.tag = data[position]
34 |         if (holder.itemViewType == 0) {
35 |             (holder as VideoViewHolder).bind(position)
36 |         } else {
37 |             (holder as ListViewHolder).bind(position)
38 |         }
39 |     }
40 | 
41 |     override fun getItemCount(): Int = data.size
42 | 
43 |     override fun getItemViewType(position: Int): Int {
44 |         return if (data[position].isVideoType) {
45 |             0
46 |         } else {
47 |             1
48 |         }
49 |     }
50 | 
51 |     fun setOnItemClickListener(listener: (item: ListModel, position: Int) -> Unit) {
52 |         _itemClick = listener
53 |     }
54 | 
55 |     private var _itemClick: ((item: ListModel, position: Int) -> Unit)? = null
56 | 
57 |     private fun bindItemClick(holder: RecyclerView.ViewHolder) {
58 |         holder.itemView.setOnClickListener {
59 |             _itemClick?.let {
60 |                 val position = holder.adapterPosition
61 |                 if (position == RecyclerView.NO_POSITION) return@setOnClickListener
62 |                 val data: ListModel = holder.itemView.tag as ListModel
63 |                 it.invoke(data, position)
64 |             }
65 |         }
66 |     }
67 | }
68 | 
69 | class VideoViewHolder constructor(private val binding: ItemGridVideoBinding) :
70 |     RecyclerView.ViewHolder(binding.root) {
71 | 
72 |     fun bind(position: Int) {
73 |         binding.itemGTopPosition.text = "$position"
74 |         binding.itemGBottomPosition.text = "$position"
75 |     }
76 | }
77 | 
78 | class ListViewHolder constructor(private val binding: ItemGridListBinding) :
79 |     RecyclerView.ViewHolder(binding.root) {
80 | 
81 |     fun bind(position: Int) {
82 |         binding.itemGPosition.text = "$position"
83 |     }
84 | }


--------------------------------------------------------------------------------
/app/src/main/res/layout/item_grid_video.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     xmlns:app="http://schemas.android.com/apk/res-auto"
 4 |     xmlns:tools="http://schemas.android.com/tools"
 5 |     android:layout_width="match_parent"
 6 |     android:layout_height="wrap_content"
 7 |     android:layout_marginTop="10dp"
 8 |     android:layout_marginEnd="10dp"
 9 |     android:background="@color/black">
10 | 
11 |     <FrameLayout
12 |         android:id="@+id/item_g_player_view"
13 |         android:layout_width="0dp"
14 |         android:layout_height="0dp"
15 |         app:layout_constraintBottom_toBottomOf="parent"
16 |         app:layout_constraintDimensionRatio="16:9"
17 |         app:layout_constraintEnd_toEndOf="parent"
18 |         app:layout_constraintStart_toStartOf="parent"
19 |         app:layout_constraintTop_toTopOf="parent">
20 | 
21 |         <com.simple.itemvisibility.renderer.TextureRenderView
22 |             android:id="@+id/item_g_renderer"
23 |             android:layout_width="match_parent"
24 |             android:layout_height="match_parent"
25 |             android:layout_gravity="center" />
26 |     </FrameLayout>
27 | 
28 |     <View
29 |         android:id="@+id/item_g_cover"
30 |         android:layout_width="0dp"
31 |         android:layout_height="0dp"
32 |         android:background="#C0C0C0"
33 |         app:layout_constraintBottom_toBottomOf="parent"
34 |         app:layout_constraintDimensionRatio="16:9"
35 |         app:layout_constraintEnd_toEndOf="parent"
36 |         app:layout_constraintStart_toStartOf="parent"
37 |         app:layout_constraintTop_toTopOf="parent" />
38 | 
39 |     <View
40 |         android:layout_width="0dp"
41 |         android:layout_height="1px"
42 |         android:background="#F40002"
43 |         app:layout_constraintBottom_toBottomOf="parent"
44 |         app:layout_constraintEnd_toEndOf="parent"
45 |         app:layout_constraintStart_toStartOf="parent"
46 |         app:layout_constraintTop_toTopOf="parent" />
47 | 
48 |     <TextView
49 |         android:id="@+id/item_g_top_position"
50 |         android:layout_width="wrap_content"
51 |         android:layout_height="wrap_content"
52 |         android:background="#80000000"
53 |         android:paddingStart="6dp"
54 |         android:paddingEnd="6dp"
55 |         android:textColor="#F40002"
56 |         android:textSize="14sp"
57 |         app:layout_constraintStart_toStartOf="parent"
58 |         app:layout_constraintTop_toTopOf="parent"
59 |         tools:text="0" />
60 | 
61 |     <TextView
62 |         android:id="@+id/item_g_bottom_position"
63 |         android:layout_width="wrap_content"
64 |         android:layout_height="wrap_content"
65 |         android:background="#80000000"
66 |         android:paddingStart="6dp"
67 |         android:paddingEnd="6dp"
68 |         android:textColor="#F40002"
69 |         android:textSize="14sp"
70 |         app:layout_constraintBottom_toBottomOf="parent"
71 |         app:layout_constraintEnd_toEndOf="parent"
72 |         tools:text="0" />
73 | </androidx.constraintlayout.widget.ConstraintLayout>


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/pager/PagerListActivity.kt:
--------------------------------------------------------------------------------
  1 | package com.simple.itemvisibility.pager
  2 | 
  3 | import android.graphics.SurfaceTexture
  4 | import android.media.MediaPlayer
  5 | import android.os.Bundle
  6 | import android.view.Surface
  7 | import android.view.TextureView.SurfaceTextureListener
  8 | import android.view.View
  9 | import android.view.ViewTreeObserver.OnGlobalLayoutListener
 10 | import androidx.appcompat.app.AppCompatActivity
 11 | import androidx.core.view.isVisible
 12 | import androidx.recyclerview.widget.PagerSnapHelper
 13 | import com.github.mminng.itemvisibility.ItemVisibilityHelper
 14 | import com.simple.itemvisibility.R
 15 | import com.simple.itemvisibility.databinding.ActivityPagerListBinding
 16 | import com.simple.itemvisibility.renderer.TextureRenderView
 17 | 
 18 | class PagerListActivity : AppCompatActivity(), SurfaceTextureListener, OnGlobalLayoutListener {
 19 | 
 20 |     private val player = MediaPlayer()
 21 |     private val helper = ItemVisibilityHelper()
 22 |     private lateinit var _binding: ActivityPagerListBinding
 23 | 
 24 |     override fun onCreate(savedInstanceState: Bundle?) {
 25 |         super.onCreate(savedInstanceState)
 26 |         _binding = ActivityPagerListBinding.inflate(layoutInflater)
 27 |         setContentView(_binding.root)
 28 | 
 29 |         val data: List<String> = arrayListOf(
 30 |             "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 31 |             "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 32 |             "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 33 |             "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 34 |             "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 35 |             "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 36 |             "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
 37 |             "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
 38 |             "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
 39 |             "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
 40 |             "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 41 |             "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 42 |             "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 43 |             "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 44 |             "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 45 |             "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 46 |             "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
 47 |             "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
 48 |             "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
 49 |             "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
 50 |         )
 51 |         val adapter = PagerListAdapter(data)
 52 |         val snapHelper = PagerSnapHelper()
 53 |         snapHelper.attachToRecyclerView(_binding.pListview)
 54 | 
 55 |         var renderView: TextureRenderView? = null
 56 |         player.setOnPreparedListener {
 57 |             player.start()
 58 |         }
 59 |         player.setOnVideoSizeChangedListener { _, w, h ->
 60 |             renderView?.setVideoSize(w, h, true)
 61 |         }
 62 |         _binding.pListview.adapter = adapter
 63 |         _binding.pListview.viewTreeObserver.addOnGlobalLayoutListener(this)
 64 |         helper.attachToRecyclerView(_binding.pListview) {
 65 |             activateItem { view, position ->
 66 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_p_renderer)
 67 |                 val cover: View = view.findViewById(R.id.item_p_cover)
 68 |                 renderView = renderer
 69 |                 cover.isVisible = false
 70 |                 player.isLooping = true
 71 |                 player.reset()
 72 |                 player.setDataSource(data[position])
 73 |                 if (renderer.surfaceTexture != null) {
 74 |                     player.setSurface(Surface(renderer.surfaceTexture))
 75 |                     player.prepareAsync()
 76 |                 } else {
 77 |                     renderer.surfaceTextureListener = this@PagerListActivity
 78 |                 }
 79 |             }
 80 |             deactivateItem { view, _ ->
 81 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_p_renderer)
 82 |                 val cover: View = view.findViewById(R.id.item_p_cover)
 83 |                 renderer.surfaceTextureListener = null
 84 |                 cover.isVisible = true
 85 |                 player.stop()
 86 |             }
 87 |         }
 88 |     }
 89 | 
 90 |     override fun onGlobalLayout() {
 91 |         _binding.pListview.viewTreeObserver.removeOnGlobalLayoutListener(this)
 92 |         helper.activateItem()
 93 |     }
 94 | 
 95 |     override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
 96 |         player.setSurface(Surface(surface))
 97 |         player.prepareAsync()
 98 |     }
 99 | 
100 |     override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
101 |     }
102 | 
103 |     override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
104 |         return true
105 |     }
106 | 
107 |     override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {
108 |     }
109 | 
110 |     override fun onPause() {
111 |         super.onPause()
112 |         player.pause()
113 |     }
114 | 
115 |     override fun onResume() {
116 |         super.onResume()
117 |         player.start()
118 |     }
119 | 
120 |     override fun onDestroy() {
121 |         super.onDestroy()
122 |         player.release()
123 |     }
124 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/horizontallist/HorizontalListActivity.kt:
--------------------------------------------------------------------------------
  1 | package com.simple.itemvisibility.horizontallist
  2 | 
  3 | import android.graphics.SurfaceTexture
  4 | import android.media.MediaPlayer
  5 | import android.os.Bundle
  6 | import android.view.Surface
  7 | import android.view.TextureView.SurfaceTextureListener
  8 | import android.view.View
  9 | import androidx.appcompat.app.AppCompatActivity
 10 | import androidx.core.view.isVisible
 11 | import androidx.recyclerview.widget.DividerItemDecoration
 12 | import androidx.recyclerview.widget.RecyclerView
 13 | import com.github.mminng.itemvisibility.ItemVisibilityHelper
 14 | import com.simple.itemvisibility.R
 15 | import com.simple.itemvisibility.databinding.ActivityHorizontalListBinding
 16 | import com.simple.itemvisibility.renderer.TextureRenderView
 17 | 
 18 | class HorizontalListActivity : AppCompatActivity(), SurfaceTextureListener {
 19 | 
 20 |     private val player = MediaPlayer()
 21 | 
 22 |     override fun onCreate(savedInstanceState: Bundle?) {
 23 |         super.onCreate(savedInstanceState)
 24 |         val binding = ActivityHorizontalListBinding.inflate(layoutInflater)
 25 |         setContentView(binding.root)
 26 | 
 27 |         val data: List<String> = arrayListOf(
 28 |             "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 29 |             "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 30 |             "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 31 |             "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 32 |             "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 33 |             "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 34 |             "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
 35 |             "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
 36 |             "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
 37 |             "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
 38 |             "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 39 |             "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 40 |             "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 41 |             "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 42 |             "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 43 |             "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 44 |             "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
 45 |             "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
 46 |             "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
 47 |             "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
 48 |         )
 49 |         val helper = ItemVisibilityHelper()
 50 |         val adapter = HorizontalListAdapter(data)
 51 |         binding.hListview.addItemDecoration(DividerItemDecoration(this, RecyclerView.HORIZONTAL))
 52 |         binding.hListview.adapter = adapter
 53 | 
 54 |         var renderView: TextureRenderView? = null
 55 |         player.setOnPreparedListener {
 56 |             player.start()
 57 |         }
 58 |         player.setOnVideoSizeChangedListener { _, w, h ->
 59 |             renderView?.setVideoSize(w, h, true)
 60 |         }
 61 |         adapter.setOnItemClickListener { _, position ->
 62 |             helper.activateItem(position)
 63 |         }
 64 |         helper.attachToRecyclerView(binding.hListview, autoActivate = false) {
 65 |             activateItem { view, position ->
 66 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_h_renderer)
 67 |                 val cover: View = view.findViewById(R.id.item_h_cover)
 68 |                 renderView = renderer
 69 |                 cover.isVisible = false
 70 |                 player.isLooping = true
 71 |                 player.reset()
 72 |                 player.setDataSource(data[position])
 73 |                 if (renderer.surfaceTexture != null) {
 74 |                     player.setSurface(Surface(renderer.surfaceTexture))
 75 |                     player.prepareAsync()
 76 |                 } else {
 77 |                     renderer.surfaceTextureListener = this@HorizontalListActivity
 78 |                 }
 79 |             }
 80 |             deactivateItem { view, _ ->
 81 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_h_renderer)
 82 |                 val cover: View = view.findViewById(R.id.item_h_cover)
 83 |                 renderer.surfaceTextureListener = null
 84 |                 cover.isVisible = true
 85 |                 player.stop()
 86 |             }
 87 |             pauseItem { _, _ ->
 88 |                 player.pause()
 89 |             }
 90 |             resumeItem { _, _ ->
 91 |                 player.start()
 92 |             }
 93 |         }
 94 |     }
 95 | 
 96 |     override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
 97 |         player.setSurface(Surface(surface))
 98 |         player.prepareAsync()
 99 |     }
100 | 
101 |     override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
102 |     }
103 | 
104 |     override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
105 |         return true
106 |     }
107 | 
108 |     override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {
109 |     }
110 | 
111 |     override fun onPause() {
112 |         super.onPause()
113 |         player.pause()
114 |     }
115 | 
116 |     override fun onResume() {
117 |         super.onResume()
118 |         player.start()
119 |     }
120 | 
121 |     override fun onDestroy() {
122 |         super.onDestroy()
123 |         player.release()
124 |     }
125 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/verticallist/VerticalListActivity.kt:
--------------------------------------------------------------------------------
  1 | package com.simple.itemvisibility.verticallist
  2 | 
  3 | import android.graphics.SurfaceTexture
  4 | import android.media.MediaPlayer
  5 | import android.os.Bundle
  6 | import android.view.Surface
  7 | import android.view.TextureView.SurfaceTextureListener
  8 | import android.view.View
  9 | import android.view.ViewTreeObserver.OnGlobalLayoutListener
 10 | import androidx.appcompat.app.AppCompatActivity
 11 | import androidx.core.view.isVisible
 12 | import androidx.recyclerview.widget.DividerItemDecoration
 13 | import androidx.recyclerview.widget.RecyclerView
 14 | import com.github.mminng.itemvisibility.ItemVisibilityHelper
 15 | import com.simple.itemvisibility.R
 16 | import com.simple.itemvisibility.databinding.ActivityVerticalListBinding
 17 | import com.simple.itemvisibility.renderer.TextureRenderView
 18 | 
 19 | class VerticalListActivity : AppCompatActivity(), SurfaceTextureListener, OnGlobalLayoutListener {
 20 | 
 21 |     private val player = MediaPlayer()
 22 |     private val helper = ItemVisibilityHelper()
 23 |     private lateinit var _binding: ActivityVerticalListBinding
 24 | 
 25 |     override fun onCreate(savedInstanceState: Bundle?) {
 26 |         super.onCreate(savedInstanceState)
 27 |         _binding = ActivityVerticalListBinding.inflate(layoutInflater)
 28 |         setContentView(_binding.root)
 29 | 
 30 |         val data: List<String> = arrayListOf(
 31 |             "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 32 |             "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 33 |             "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 34 |             "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 35 |             "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 36 |             "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 37 |             "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
 38 |             "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
 39 |             "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
 40 |             "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
 41 |             "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 42 |             "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 43 |             "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 44 |             "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 45 |             "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 46 |             "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 47 |             "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
 48 |             "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
 49 |             "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
 50 |             "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
 51 |         )
 52 |         val adapter = VerticalListAdapter(data)
 53 |         _binding.vListview.addItemDecoration(DividerItemDecoration(this, RecyclerView.VERTICAL))
 54 |         _binding.vListview.adapter = adapter
 55 |         _binding.vListview.viewTreeObserver.addOnGlobalLayoutListener(this)
 56 | 
 57 |         var renderView: TextureRenderView? = null
 58 |         player.setOnPreparedListener {
 59 |             player.start()
 60 |         }
 61 |         player.setOnVideoSizeChangedListener { _, w, h ->
 62 |             renderView?.setVideoSize(w, h, true)
 63 |         }
 64 |         adapter.setOnItemClickListener { _, position ->
 65 |             helper.activateItem(position)
 66 |         }
 67 |         helper.attachToRecyclerView(_binding.vListview, R.id.item_v_player_view) {
 68 |             activateItem { view, position ->
 69 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_v_renderer)
 70 |                 val cover: View = view.findViewById(R.id.item_v_cover)
 71 |                 renderView = renderer
 72 |                 cover.isVisible = false
 73 |                 player.reset()
 74 |                 player.isLooping = true
 75 |                 player.setDataSource(data[position])
 76 |                 if (renderer.surfaceTexture != null) {
 77 |                     player.setSurface(Surface(renderer.surfaceTexture))
 78 |                     player.prepareAsync()
 79 |                 } else {
 80 |                     renderer.surfaceTextureListener = this@VerticalListActivity
 81 |                 }
 82 |             }
 83 |             deactivateItem { view, _ ->
 84 |                 val cover: View = view.findViewById(R.id.item_v_cover)
 85 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_v_renderer)
 86 |                 cover.isVisible = true
 87 |                 renderer.surfaceTextureListener = null
 88 |                 player.stop()
 89 |             }
 90 |         }
 91 |     }
 92 | 
 93 |     override fun onGlobalLayout() {
 94 |         _binding.vListview.viewTreeObserver.removeOnGlobalLayoutListener(this)
 95 |         helper.activateItem()
 96 |     }
 97 | 
 98 |     override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
 99 |         player.setSurface(Surface(surface))
100 |         player.prepareAsync()
101 |     }
102 | 
103 |     override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
104 |     }
105 | 
106 |     override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
107 |         return true
108 |     }
109 | 
110 |     override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {
111 |     }
112 | 
113 |     override fun onPause() {
114 |         super.onPause()
115 |         player.pause()
116 |     }
117 | 
118 |     override fun onResume() {
119 |         super.onResume()
120 |         player.start()
121 |     }
122 | 
123 |     override fun onDestroy() {
124 |         super.onDestroy()
125 |         player.release()
126 |     }
127 | }


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/staggered/StaggeredListActivity.kt:
--------------------------------------------------------------------------------
  1 | package com.simple.itemvisibility.staggered
  2 | 
  3 | import android.graphics.SurfaceTexture
  4 | import android.media.MediaPlayer
  5 | import android.os.Bundle
  6 | import android.view.Surface
  7 | import android.view.TextureView.SurfaceTextureListener
  8 | import android.view.View
  9 | import android.view.ViewTreeObserver.OnGlobalLayoutListener
 10 | import androidx.appcompat.app.AppCompatActivity
 11 | import androidx.core.view.isVisible
 12 | import com.github.mminng.itemvisibility.ItemVisibilityHelper
 13 | import com.simple.itemvisibility.R
 14 | import com.simple.itemvisibility.databinding.ActivityStaggeredListBinding
 15 | import com.simple.itemvisibility.renderer.TextureRenderView
 16 | 
 17 | class StaggeredListActivity : AppCompatActivity(), SurfaceTextureListener, OnGlobalLayoutListener {
 18 | 
 19 |     private val player = MediaPlayer()
 20 |     private val helper = ItemVisibilityHelper()
 21 |     private lateinit var _binding: ActivityStaggeredListBinding
 22 | 
 23 |     override fun onCreate(savedInstanceState: Bundle?) {
 24 |         super.onCreate(savedInstanceState)
 25 |         _binding = ActivityStaggeredListBinding.inflate(layoutInflater)
 26 |         setContentView(_binding.root)
 27 | 
 28 |         val data: List<ListModel> = arrayListOf(
 29 |             ListModel("https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4", 200),
 30 |             ListModel("https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4", 300),
 31 |             ListModel("https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4", 380),
 32 |             ListModel("https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4", 240),
 33 |             ListModel("https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4", 340),
 34 |             ListModel("https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4", 200),
 35 |             ListModel("https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4", 400),
 36 |             ListModel("https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4", 280),
 37 |             ListModel("https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4", 380),
 38 |             ListModel("https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4", 220),
 39 |             ListModel("https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4", 320),
 40 |             ListModel("https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4", 400),
 41 |             ListModel("https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4", 280),
 42 |             ListModel("https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4", 340),
 43 |             ListModel("https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4", 220),
 44 |             ListModel("https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4", 400),
 45 |             ListModel("https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4", 280),
 46 |             ListModel("https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4", 360),
 47 |             ListModel("https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4", 200),
 48 |         )
 49 |         val adapter = StaggeredListAdapter(data)
 50 |         _binding.sListview.adapter = adapter
 51 |         _binding.sListview.viewTreeObserver.addOnGlobalLayoutListener(this)
 52 | 
 53 |         var renderView: TextureRenderView? = null
 54 |         player.setOnPreparedListener {
 55 |             player.start()
 56 |         }
 57 |         player.setOnVideoSizeChangedListener { _, w, h ->
 58 |             renderView?.setVideoSize(w, h, true)
 59 |         }
 60 |         adapter.setOnItemClickListener { _, position ->
 61 |             helper.activateItem(position)
 62 |         }
 63 |         helper.attachToRecyclerView(_binding.sListview, R.id.item_s_player_view) {
 64 |             activateItem { view, position ->
 65 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_s_renderer)
 66 |                 val cover: View = view.findViewById(R.id.item_s_cover)
 67 |                 renderView = renderer
 68 |                 cover.isVisible = false
 69 |                 player.reset()
 70 |                 player.isLooping = true
 71 |                 player.setDataSource(data[position].url)
 72 |                 if (renderer.surfaceTexture != null) {
 73 |                     player.setSurface(Surface(renderer.surfaceTexture))
 74 |                     player.prepareAsync()
 75 |                 } else {
 76 |                     renderer.surfaceTextureListener = this@StaggeredListActivity
 77 |                 }
 78 |             }
 79 |             deactivateItem { view, _ ->
 80 |                 val cover: View = view.findViewById(R.id.item_s_cover)
 81 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_s_renderer)
 82 |                 cover.isVisible = true
 83 |                 renderer.surfaceTextureListener = null
 84 |                 player.stop()
 85 |             }
 86 |         }
 87 |     }
 88 | 
 89 |     override fun onGlobalLayout() {
 90 |         _binding.sListview.viewTreeObserver.removeOnGlobalLayoutListener(this)
 91 |         helper.activateItem()
 92 |     }
 93 | 
 94 |     override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
 95 |         player.setSurface(Surface(surface))
 96 |         player.prepareAsync()
 97 |     }
 98 | 
 99 |     override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
100 |     }
101 | 
102 |     override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
103 |         return true
104 |     }
105 | 
106 |     override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {
107 |     }
108 | 
109 |     override fun onPause() {
110 |         super.onPause()
111 |         player.pause()
112 |     }
113 | 
114 |     override fun onResume() {
115 |         super.onResume()
116 |         player.start()
117 |     }
118 | 
119 |     override fun onDestroy() {
120 |         super.onDestroy()
121 |         player.release()
122 |     }
123 | }


--------------------------------------------------------------------------------
/app/src/main/res/drawable/ic_launcher_background.xml:
--------------------------------------------------------------------------------
  1 | <?xml version="1.0" encoding="utf-8"?>
  2 | <vector xmlns:android="http://schemas.android.com/apk/res/android"
  3 |     android:width="108dp"
  4 |     android:height="108dp"
  5 |     android:viewportWidth="108"
  6 |     android:viewportHeight="108">
  7 |     <path
  8 |         android:fillColor="#3DDC84"
  9 |         android:pathData="M0,0h108v108h-108z" />
 10 |     <path
 11 |         android:fillColor="#00000000"
 12 |         android:pathData="M9,0L9,108"
 13 |         android:strokeWidth="0.8"
 14 |         android:strokeColor="#33FFFFFF" />
 15 |     <path
 16 |         android:fillColor="#00000000"
 17 |         android:pathData="M19,0L19,108"
 18 |         android:strokeWidth="0.8"
 19 |         android:strokeColor="#33FFFFFF" />
 20 |     <path
 21 |         android:fillColor="#00000000"
 22 |         android:pathData="M29,0L29,108"
 23 |         android:strokeWidth="0.8"
 24 |         android:strokeColor="#33FFFFFF" />
 25 |     <path
 26 |         android:fillColor="#00000000"
 27 |         android:pathData="M39,0L39,108"
 28 |         android:strokeWidth="0.8"
 29 |         android:strokeColor="#33FFFFFF" />
 30 |     <path
 31 |         android:fillColor="#00000000"
 32 |         android:pathData="M49,0L49,108"
 33 |         android:strokeWidth="0.8"
 34 |         android:strokeColor="#33FFFFFF" />
 35 |     <path
 36 |         android:fillColor="#00000000"
 37 |         android:pathData="M59,0L59,108"
 38 |         android:strokeWidth="0.8"
 39 |         android:strokeColor="#33FFFFFF" />
 40 |     <path
 41 |         android:fillColor="#00000000"
 42 |         android:pathData="M69,0L69,108"
 43 |         android:strokeWidth="0.8"
 44 |         android:strokeColor="#33FFFFFF" />
 45 |     <path
 46 |         android:fillColor="#00000000"
 47 |         android:pathData="M79,0L79,108"
 48 |         android:strokeWidth="0.8"
 49 |         android:strokeColor="#33FFFFFF" />
 50 |     <path
 51 |         android:fillColor="#00000000"
 52 |         android:pathData="M89,0L89,108"
 53 |         android:strokeWidth="0.8"
 54 |         android:strokeColor="#33FFFFFF" />
 55 |     <path
 56 |         android:fillColor="#00000000"
 57 |         android:pathData="M99,0L99,108"
 58 |         android:strokeWidth="0.8"
 59 |         android:strokeColor="#33FFFFFF" />
 60 |     <path
 61 |         android:fillColor="#00000000"
 62 |         android:pathData="M0,9L108,9"
 63 |         android:strokeWidth="0.8"
 64 |         android:strokeColor="#33FFFFFF" />
 65 |     <path
 66 |         android:fillColor="#00000000"
 67 |         android:pathData="M0,19L108,19"
 68 |         android:strokeWidth="0.8"
 69 |         android:strokeColor="#33FFFFFF" />
 70 |     <path
 71 |         android:fillColor="#00000000"
 72 |         android:pathData="M0,29L108,29"
 73 |         android:strokeWidth="0.8"
 74 |         android:strokeColor="#33FFFFFF" />
 75 |     <path
 76 |         android:fillColor="#00000000"
 77 |         android:pathData="M0,39L108,39"
 78 |         android:strokeWidth="0.8"
 79 |         android:strokeColor="#33FFFFFF" />
 80 |     <path
 81 |         android:fillColor="#00000000"
 82 |         android:pathData="M0,49L108,49"
 83 |         android:strokeWidth="0.8"
 84 |         android:strokeColor="#33FFFFFF" />
 85 |     <path
 86 |         android:fillColor="#00000000"
 87 |         android:pathData="M0,59L108,59"
 88 |         android:strokeWidth="0.8"
 89 |         android:strokeColor="#33FFFFFF" />
 90 |     <path
 91 |         android:fillColor="#00000000"
 92 |         android:pathData="M0,69L108,69"
 93 |         android:strokeWidth="0.8"
 94 |         android:strokeColor="#33FFFFFF" />
 95 |     <path
 96 |         android:fillColor="#00000000"
 97 |         android:pathData="M0,79L108,79"
 98 |         android:strokeWidth="0.8"
 99 |         android:strokeColor="#33FFFFFF" />
100 |     <path
101 |         android:fillColor="#00000000"
102 |         android:pathData="M0,89L108,89"
103 |         android:strokeWidth="0.8"
104 |         android:strokeColor="#33FFFFFF" />
105 |     <path
106 |         android:fillColor="#00000000"
107 |         android:pathData="M0,99L108,99"
108 |         android:strokeWidth="0.8"
109 |         android:strokeColor="#33FFFFFF" />
110 |     <path
111 |         android:fillColor="#00000000"
112 |         android:pathData="M19,29L89,29"
113 |         android:strokeWidth="0.8"
114 |         android:strokeColor="#33FFFFFF" />
115 |     <path
116 |         android:fillColor="#00000000"
117 |         android:pathData="M19,39L89,39"
118 |         android:strokeWidth="0.8"
119 |         android:strokeColor="#33FFFFFF" />
120 |     <path
121 |         android:fillColor="#00000000"
122 |         android:pathData="M19,49L89,49"
123 |         android:strokeWidth="0.8"
124 |         android:strokeColor="#33FFFFFF" />
125 |     <path
126 |         android:fillColor="#00000000"
127 |         android:pathData="M19,59L89,59"
128 |         android:strokeWidth="0.8"
129 |         android:strokeColor="#33FFFFFF" />
130 |     <path
131 |         android:fillColor="#00000000"
132 |         android:pathData="M19,69L89,69"
133 |         android:strokeWidth="0.8"
134 |         android:strokeColor="#33FFFFFF" />
135 |     <path
136 |         android:fillColor="#00000000"
137 |         android:pathData="M19,79L89,79"
138 |         android:strokeWidth="0.8"
139 |         android:strokeColor="#33FFFFFF" />
140 |     <path
141 |         android:fillColor="#00000000"
142 |         android:pathData="M29,19L29,89"
143 |         android:strokeWidth="0.8"
144 |         android:strokeColor="#33FFFFFF" />
145 |     <path
146 |         android:fillColor="#00000000"
147 |         android:pathData="M39,19L39,89"
148 |         android:strokeWidth="0.8"
149 |         android:strokeColor="#33FFFFFF" />
150 |     <path
151 |         android:fillColor="#00000000"
152 |         android:pathData="M49,19L49,89"
153 |         android:strokeWidth="0.8"
154 |         android:strokeColor="#33FFFFFF" />
155 |     <path
156 |         android:fillColor="#00000000"
157 |         android:pathData="M59,19L59,89"
158 |         android:strokeWidth="0.8"
159 |         android:strokeColor="#33FFFFFF" />
160 |     <path
161 |         android:fillColor="#00000000"
162 |         android:pathData="M69,19L69,89"
163 |         android:strokeWidth="0.8"
164 |         android:strokeColor="#33FFFFFF" />
165 |     <path
166 |         android:fillColor="#00000000"
167 |         android:pathData="M79,19L79,89"
168 |         android:strokeWidth="0.8"
169 |         android:strokeColor="#33FFFFFF" />
170 | </vector>
171 | 


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/gird/GridListActivity.kt:
--------------------------------------------------------------------------------
  1 | package com.simple.itemvisibility.gird
  2 | 
  3 | import android.graphics.SurfaceTexture
  4 | import android.media.MediaPlayer
  5 | import android.os.Bundle
  6 | import android.view.Surface
  7 | import android.view.TextureView.SurfaceTextureListener
  8 | import android.view.View
  9 | import android.view.ViewTreeObserver.OnGlobalLayoutListener
 10 | import androidx.appcompat.app.AppCompatActivity
 11 | import androidx.core.view.isVisible
 12 | import androidx.recyclerview.widget.GridLayoutManager
 13 | import androidx.recyclerview.widget.GridLayoutManager.SpanSizeLookup
 14 | import com.github.mminng.itemvisibility.ItemVisibilityHelper
 15 | import com.simple.itemvisibility.R
 16 | import com.simple.itemvisibility.databinding.ActivityGridListBinding
 17 | import com.simple.itemvisibility.renderer.TextureRenderView
 18 | 
 19 | class GridListActivity : AppCompatActivity(), SurfaceTextureListener, OnGlobalLayoutListener {
 20 | 
 21 |     private val player = MediaPlayer()
 22 |     private val helper = ItemVisibilityHelper()
 23 |     private lateinit var _binding: ActivityGridListBinding
 24 | 
 25 |     override fun onCreate(savedInstanceState: Bundle?) {
 26 |         super.onCreate(savedInstanceState)
 27 |         _binding = ActivityGridListBinding.inflate(layoutInflater)
 28 |         setContentView(_binding.root)
 29 | 
 30 |         val data: List<ListModel> = arrayListOf(
 31 |             ListModel("", false),
 32 |             ListModel("", false),
 33 |             ListModel("https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4", true),
 34 |             ListModel("", false),
 35 |             ListModel("", false),
 36 |             ListModel("", false),
 37 |             ListModel("", false),
 38 |             ListModel("https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4", true),
 39 |             ListModel("", false),
 40 |             ListModel("", false),
 41 |             ListModel("", false),
 42 |             ListModel("", false),
 43 |             ListModel("", false),
 44 |             ListModel("", false),
 45 |             ListModel("https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4", true),
 46 |             ListModel("https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4", true),
 47 |             ListModel("", false),
 48 |             ListModel("", false),
 49 |             ListModel("", false),
 50 |             ListModel("https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4", true),
 51 |             ListModel("", false),
 52 |             ListModel("", false),
 53 |             ListModel("https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4", true),
 54 |             ListModel("", false),
 55 |             ListModel("", false),
 56 |             ListModel("", false),
 57 |             ListModel("", false),
 58 |             ListModel("https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4", true),
 59 |             ListModel("", false),
 60 |             ListModel("", false),
 61 |         )
 62 |         val adapter = GridListAdapter(data)
 63 |         _binding.gListview.viewTreeObserver.addOnGlobalLayoutListener(this)
 64 |         _binding.gListview.adapter = adapter
 65 |         val layoutManager = GridLayoutManager(this, 2)
 66 |         _binding.gListview.layoutManager = layoutManager
 67 |         layoutManager.spanSizeLookup = object : SpanSizeLookup() {
 68 |             override fun getSpanSize(position: Int): Int {
 69 |                 if (data[position].isVideoType) {
 70 |                     return layoutManager.spanCount
 71 |                 }
 72 |                 return 1
 73 |             }
 74 |         }
 75 |         var renderView: TextureRenderView? = null
 76 |         player.setOnPreparedListener {
 77 |             player.start()
 78 |         }
 79 |         player.setOnVideoSizeChangedListener { _, w, h ->
 80 |             renderView?.setVideoSize(w, h, true)
 81 |         }
 82 |         adapter.setOnItemClickListener { _, position ->
 83 |             helper.activateItem(position)
 84 |         }
 85 |         helper.attachToRecyclerView(_binding.gListview, R.id.item_g_player_view) {
 86 |             activateItem { view, position ->
 87 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_g_renderer)
 88 |                 val cover: View = view.findViewById(R.id.item_g_cover)
 89 |                 renderView = renderer
 90 |                 cover.isVisible = false
 91 |                 player.reset()
 92 |                 player.isLooping = true
 93 |                 player.setDataSource(data[position].url)
 94 |                 if (renderer.surfaceTexture != null) {
 95 |                     player.setSurface(Surface(renderer.surfaceTexture))
 96 |                     player.prepareAsync()
 97 |                 } else {
 98 |                     renderer.surfaceTextureListener = this@GridListActivity
 99 |                 }
100 |             }
101 |             deactivateItem { view, _ ->
102 |                 val cover: View = view.findViewById(R.id.item_g_cover)
103 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_g_renderer)
104 |                 cover.isVisible = true
105 |                 renderer.surfaceTextureListener = null
106 |                 player.stop()
107 |             }
108 |             pauseItem { _, _ ->
109 |                 player.pause()
110 |             }
111 |             resumeItem { _, _ ->
112 |                 player.start()
113 |             }
114 |         }
115 |     }
116 | 
117 |     override fun onGlobalLayout() {
118 |         _binding.gListview.viewTreeObserver.removeOnGlobalLayoutListener(this)
119 |         helper.activateItem()
120 |     }
121 | 
122 |     override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
123 |         player.setSurface(Surface(surface))
124 |         player.prepareAsync()
125 |     }
126 | 
127 |     override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
128 |     }
129 | 
130 |     override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
131 |         return true
132 |     }
133 | 
134 |     override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {
135 |     }
136 | 
137 |     override fun onPause() {
138 |         super.onPause()
139 |         player.pause()
140 |     }
141 | 
142 |     override fun onResume() {
143 |         super.onResume()
144 |         player.start()
145 |     }
146 | 
147 |     override fun onDestroy() {
148 |         super.onDestroy()
149 |         player.release()
150 |     }
151 | }


--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
  1 | #!/usr/bin/env sh
  2 | 
  3 | #
  4 | # Copyright 2015 the original author or authors.
  5 | #
  6 | # Licensed under the Apache License, Version 2.0 (the "License");
  7 | # you may not use this file except in compliance with the License.
  8 | # You may obtain a copy of the License at
  9 | #
 10 | #      https://www.apache.org/licenses/LICENSE-2.0
 11 | #
 12 | # Unless required by applicable law or agreed to in writing, software
 13 | # distributed under the License is distributed on an "AS IS" BASIS,
 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15 | # See the License for the specific language governing permissions and
 16 | # limitations under the License.
 17 | #
 18 | 
 19 | ##############################################################################
 20 | ##
 21 | ##  Gradle start up script for UN*X
 22 | ##
 23 | ##############################################################################
 24 | 
 25 | # Attempt to set APP_HOME
 26 | # Resolve links: $0 may be a link
 27 | PRG="$0"
 28 | # Need this for relative symlinks.
 29 | while [ -h "$PRG" ] ; do
 30 |     ls=`ls -ld "$PRG"`
 31 |     link=`expr "$ls" : '.*-> \(.*\)$'`
 32 |     if expr "$link" : '/.*' > /dev/null; then
 33 |         PRG="$link"
 34 |     else
 35 |         PRG=`dirname "$PRG"`"/$link"
 36 |     fi
 37 | done
 38 | SAVED="`pwd`"
 39 | cd "`dirname \"$PRG\"`/" >/dev/null
 40 | APP_HOME="`pwd -P`"
 41 | cd "$SAVED" >/dev/null
 42 | 
 43 | APP_NAME="Gradle"
 44 | APP_BASE_NAME=`basename "$0"`
 45 | 
 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 48 | 
 49 | # Use the maximum available, or set MAX_FD != -1 to use that value.
 50 | MAX_FD="maximum"
 51 | 
 52 | warn () {
 53 |     echo "$*"
 54 | }
 55 | 
 56 | die () {
 57 |     echo
 58 |     echo "$*"
 59 |     echo
 60 |     exit 1
 61 | }
 62 | 
 63 | # OS specific support (must be 'true' or 'false').
 64 | cygwin=false
 65 | msys=false
 66 | darwin=false
 67 | nonstop=false
 68 | case "`uname`" in
 69 |   CYGWIN* )
 70 |     cygwin=true
 71 |     ;;
 72 |   Darwin* )
 73 |     darwin=true
 74 |     ;;
 75 |   MINGW* )
 76 |     msys=true
 77 |     ;;
 78 |   NONSTOP* )
 79 |     nonstop=true
 80 |     ;;
 81 | esac
 82 | 
 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 84 | 
 85 | 
 86 | # Determine the Java command to use to start the JVM.
 87 | if [ -n "$JAVA_HOME" ] ; then
 88 |     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
 89 |         # IBM's JDK on AIX uses strange locations for the executables
 90 |         JAVACMD="$JAVA_HOME/jre/sh/java"
 91 |     else
 92 |         JAVACMD="$JAVA_HOME/bin/java"
 93 |     fi
 94 |     if [ ! -x "$JAVACMD" ] ; then
 95 |         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
 96 | 
 97 | Please set the JAVA_HOME variable in your environment to match the
 98 | location of your Java installation."
 99 |     fi
100 | else
101 |     JAVACMD="java"
102 |     which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
103 | 
104 | Please set the JAVA_HOME variable in your environment to match the
105 | location of your Java installation."
106 | fi
107 | 
108 | # Increase the maximum file descriptors if we can.
109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
110 |     MAX_FD_LIMIT=`ulimit -H -n`
111 |     if [ $? -eq 0 ] ; then
112 |         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
113 |             MAX_FD="$MAX_FD_LIMIT"
114 |         fi
115 |         ulimit -n $MAX_FD
116 |         if [ $? -ne 0 ] ; then
117 |             warn "Could not set maximum file descriptor limit: $MAX_FD"
118 |         fi
119 |     else
120 |         warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
121 |     fi
122 | fi
123 | 
124 | # For Darwin, add options to specify how the application appears in the dock
125 | if $darwin; then
126 |     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
127 | fi
128 | 
129 | # For Cygwin or MSYS, switch paths to Windows format before running java
130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
131 |     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
132 |     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
133 | 
134 |     JAVACMD=`cygpath --unix "$JAVACMD"`
135 | 
136 |     # We build the pattern for arguments to be converted via cygpath
137 |     ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
138 |     SEP=""
139 |     for dir in $ROOTDIRSRAW ; do
140 |         ROOTDIRS="$ROOTDIRS$SEP$dir"
141 |         SEP="|"
142 |     done
143 |     OURCYGPATTERN="(^($ROOTDIRS))"
144 |     # Add a user-defined pattern to the cygpath arguments
145 |     if [ "$GRADLE_CYGPATTERN" != "" ] ; then
146 |         OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
147 |     fi
148 |     # Now convert the arguments - kludge to limit ourselves to /bin/sh
149 |     i=0
150 |     for arg in "$@" ; do
151 |         CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
152 |         CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
153 | 
154 |         if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
155 |             eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
156 |         else
157 |             eval `echo args$i`="\"$arg\""
158 |         fi
159 |         i=`expr $i + 1`
160 |     done
161 |     case $i in
162 |         0) set -- ;;
163 |         1) set -- "$args0" ;;
164 |         2) set -- "$args0" "$args1" ;;
165 |         3) set -- "$args0" "$args1" "$args2" ;;
166 |         4) set -- "$args0" "$args1" "$args2" "$args3" ;;
167 |         5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
168 |         6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
169 |         7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
170 |         8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
171 |         9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
172 |     esac
173 | fi
174 | 
175 | # Escape application args
176 | save () {
177 |     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
178 |     echo " "
179 | }
180 | APP_ARGS=`save "$@"`
181 | 
182 | # Collect all arguments for the java command, following the shell quoting and substitution rules
183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
184 | 
185 | exec "$JAVACMD" "$@"
186 | 


--------------------------------------------------------------------------------
/app/src/main/java/com/simple/itemvisibility/flex/FlexListActivity.kt:
--------------------------------------------------------------------------------
  1 | package com.simple.itemvisibility.flex
  2 | 
  3 | import android.graphics.SurfaceTexture
  4 | import android.media.MediaPlayer
  5 | import android.os.Bundle
  6 | import android.view.Surface
  7 | import android.view.TextureView.SurfaceTextureListener
  8 | import android.view.View
  9 | import android.view.ViewTreeObserver.OnGlobalLayoutListener
 10 | import androidx.appcompat.app.AppCompatActivity
 11 | import androidx.core.view.isVisible
 12 | import com.github.mminng.itemvisibility.ItemVisibilityHelper
 13 | import com.google.android.flexbox.FlexDirection
 14 | import com.google.android.flexbox.FlexboxLayoutManager
 15 | import com.google.android.flexbox.JustifyContent
 16 | import com.simple.itemvisibility.R
 17 | import com.simple.itemvisibility.databinding.ActivityFlexListBinding
 18 | import com.simple.itemvisibility.renderer.TextureRenderView
 19 | 
 20 | class FlexListActivity : AppCompatActivity(), SurfaceTextureListener, OnGlobalLayoutListener {
 21 | 
 22 |     private val player = MediaPlayer()
 23 |     private val helper = ItemVisibilityHelper()
 24 |     private lateinit var _binding: ActivityFlexListBinding
 25 | 
 26 |     override fun onCreate(savedInstanceState: Bundle?) {
 27 |         super.onCreate(savedInstanceState)
 28 |         _binding = ActivityFlexListBinding.inflate(layoutInflater)
 29 |         setContentView(_binding.root)
 30 | 
 31 |         val data: List<ListModel> = arrayListOf(
 32 |             ListModel(
 33 |                 "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 34 |                 "TitleTitle"
 35 |             ),
 36 |             ListModel(
 37 |                 "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 38 |                 "TitleTitleTitle"
 39 |             ),
 40 |             ListModel(
 41 |                 "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 42 |                 "TitleTitle"
 43 |             ),
 44 |             ListModel(
 45 |                 "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 46 |                 "TitleTitleTitleTitle"
 47 |             ),
 48 |             ListModel(
 49 |                 "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 50 |                 "TitleTitleTitleTitleTile"
 51 |             ),
 52 |             ListModel(
 53 |                 "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 54 |                 "TitleTitleTitle"
 55 |             ),
 56 |             ListModel(
 57 |                 "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 58 |                 "TitleTitleTitle"
 59 |             ),
 60 |             ListModel(
 61 |                 "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
 62 |                 "TitleTitleTitleTitleTileTileTitle"
 63 |             ),
 64 |             ListModel(
 65 |                 "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
 66 |                 "TitleTitleTitle"
 67 |             ),
 68 |             ListModel(
 69 |                 "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
 70 |                 "TitleTitleTitleTitleTile"
 71 |             ),
 72 |             ListModel(
 73 |                 "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
 74 |                 "TitleTitleTitleTitleTileTileTitle"
 75 |             ),
 76 |             ListModel(
 77 |                 "https://vfx.mtime.cn/Video/2023/03/16/mp4/230316090518494157.mp4",
 78 |                 "TitleTitleTitle"
 79 |             ),
 80 |             ListModel(
 81 |                 "https://vfx.mtime.cn/Video/2023/04/20/mp4/230420002252951119.mp4",
 82 |                 "TitleTitleTitleTitleTileTileTitle"
 83 |             ),
 84 |             ListModel(
 85 |                 "https://vfx.mtime.cn/Video/2023/04/11/mp4/230411091926610168.mp4",
 86 |                 "TitleTitleTitleTitleTile"
 87 |             ),
 88 |             ListModel(
 89 |                 "https://vfx.mtime.cn/Video/2022/09/29/mp4/220929091956826121.mp4",
 90 |                 "TitleTitleTitle"
 91 |             ),
 92 |             ListModel(
 93 |                 "https://vfx.mtime.cn/Video/2023/04/10/mp4/230410121450786149.mp4",
 94 |                 "TitleTitleTitleTitleTileTileTitle"
 95 |             ),
 96 |             ListModel(
 97 |                 "https://vfx.mtime.cn/Video/2018/12/03/mp4/181203164204289930.mp4",
 98 |                 "TitleTitleTitle"
 99 |             ),
100 |             ListModel(
101 |                 "https://vfx.mtime.cn/Video/2019/12/20/mp4/191220092951535445.mp4",
102 |                 "TitleTitleTitleTitleTile"
103 |             ),
104 |             ListModel(
105 |                 "https://vfx.mtime.cn/Video/2020/08/21/mp4/200821152204529139.mp4",
106 |                 "TitleTitleTitleTitleTileTileTitle"
107 |             ),
108 |             ListModel(
109 |                 "https://vfx.mtime.cn/Video/2014/03/06/mp4/140306102651231568.mp4",
110 |                 "TitleTitleTitleTitleTileTileTitleTitleTile"
111 |             ),
112 |             ListModel(
113 |                 "https://vfx.mtime.cn/Video/2023/01/11/mp4/230111074714264116.mp4",
114 |                 "TitleTitleTitleTitleTile"
115 |             ),
116 |         )
117 |         val adapter = FlexListAdapter(data)
118 |         val layoutManager = FlexboxLayoutManager(this)
119 |         layoutManager.flexDirection = FlexDirection.ROW
120 |         layoutManager.justifyContent = JustifyContent.FLEX_START
121 | 
122 |         _binding.fListview.layoutManager = layoutManager
123 |         _binding.fListview.adapter = adapter
124 |         _binding.fListview.viewTreeObserver.addOnGlobalLayoutListener(this)
125 | 
126 |         var renderView: TextureRenderView? = null
127 |         player.setOnPreparedListener {
128 |             player.start()
129 |         }
130 |         player.setOnVideoSizeChangedListener { _, w, h ->
131 |             renderView?.setVideoSize(w, h, true)
132 |         }
133 |         adapter.setOnItemClickListener { _, position ->
134 |             helper.activateItem(position)
135 |         }
136 |         helper.attachToRecyclerView(_binding.fListview, R.id.item_f_player_view) {
137 |             activateItem { view, position ->
138 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_f_renderer)
139 |                 val cover: View = view.findViewById(R.id.item_f_cover)
140 |                 renderView = renderer
141 |                 cover.isVisible = false
142 |                 player.reset()
143 |                 player.isLooping = true
144 |                 player.setDataSource(data[position].url)
145 |                 if (renderer.surfaceTexture != null) {
146 |                     player.setSurface(Surface(renderer.surfaceTexture))
147 |                     player.prepareAsync()
148 |                 } else {
149 |                     renderer.surfaceTextureListener = this@FlexListActivity
150 |                 }
151 |             }
152 |             deactivateItem { view, _ ->
153 |                 val cover: View = view.findViewById(R.id.item_f_cover)
154 |                 val renderer: TextureRenderView = view.findViewById(R.id.item_f_renderer)
155 |                 cover.isVisible = true
156 |                 renderer.surfaceTextureListener = null
157 |                 player.stop()
158 |             }
159 |         }
160 |     }
161 | 
162 |     override fun onGlobalLayout() {
163 |         _binding.fListview.viewTreeObserver.removeOnGlobalLayoutListener(this)
164 |         helper.activateItem()
165 |     }
166 | 
167 |     override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
168 |         player.setSurface(Surface(surface))
169 |         player.prepareAsync()
170 |     }
171 | 
172 |     override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
173 |     }
174 | 
175 |     override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
176 |         return true
177 |     }
178 | 
179 |     override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {
180 |     }
181 | 
182 |     override fun onPause() {
183 |         super.onPause()
184 |         player.pause()
185 |     }
186 | 
187 |     override fun onResume() {
188 |         super.onResume()
189 |         player.start()
190 |     }
191 | 
192 |     override fun onDestroy() {
193 |         super.onDestroy()
194 |         player.release()
195 |     }
196 | }


--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/library/src/main/java/com/github/mminng/itemvisibility/ItemVisibilityHelper.kt:
--------------------------------------------------------------------------------
  1 | package com.github.mminng.itemvisibility
  2 | 
  3 | import android.graphics.Rect
  4 | import android.util.Pair
  5 | import android.view.View
  6 | import androidx.annotation.IdRes
  7 | import androidx.recyclerview.widget.LinearLayoutManager
  8 | import androidx.recyclerview.widget.RecyclerView
  9 | import androidx.recyclerview.widget.StaggeredGridLayoutManager
 10 | import com.github.mminng.itemvisibility.listener.ItemStateChangeListener
 11 | import com.github.mminng.itemvisibility.logger.loggerD
 12 | import com.github.mminng.itemvisibility.logger.loggerI
 13 | 
 14 | /**
 15 |  * Created by zh on 2023/4/27.
 16 |  *
 17 |  * 1.滑动中，如果激活中的Item被移出显示范围，就关闭。
 18 |  * 2.滑动停止，如果激活中的Item可见范围大于50%则保持不变，否则关闭。
 19 |  *   同时激活显示范围中可见范围最大并且不小于50%的Item，如果可见范围最大的依然是激活中的Item，
 20 |  *   那么可见范围大于50%则保持不变，否则不会关闭，会进入暂停状态，等可见范围不小于50%时恢复。
 21 |  *   另外，如果激活中的Item可见范围小于50%，但是显示范围中没有其他Item需要激活，
 22 |  *   此时这个Item也会进入暂停状态，等可见范围不小于50%时恢复。
 23 |  */
 24 | class ItemVisibilityHelper : RecyclerView.OnChildAttachStateChangeListener {
 25 |     private var _recyclerView: RecyclerView? = null
 26 |     private var _targetViewId: Int = View.NO_ID
 27 |     private var _orientation: Int = RecyclerView.VERTICAL
 28 |     private var _isReverseLayout: Boolean = false
 29 |     private var _isTopCloser: Boolean = true
 30 |     private var _isPauseState: Boolean = false
 31 |     private var _isAutoActivate: Boolean = true
 32 |     private var _activatePosition: Int = RecyclerView.NO_POSITION
 33 |     private var _itemStateChangeListener: ItemStateChangeListener? = null
 34 |     private val outRect: Rect = Rect()
 35 |     private val scrollListener = object : RecyclerView.OnScrollListener() {
 36 |         var isScrolled = false
 37 | 
 38 |         override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
 39 |             if (isScrolled && recyclerView.isShown && newState == RecyclerView.SCROLL_STATE_IDLE) {
 40 |                 isScrolled = false
 41 |                 val newItem: Pair<View, Int> = findNewItem()
 42 |                 if (newItem.first == null) return
 43 |                 //如果找到的Item是已激活的Item
 44 |                 if (isActivateItem(newItem.second)) {
 45 |                     val percent = getItemVisiblePercent(newItem.first)
 46 |                     loggerD("Found item was activated, visible percent is $percent%.")
 47 |                     if (percent < 50) {
 48 |                         pauseItem(newItem.first, newItem.second)
 49 |                     } else {
 50 |                         resumeItem(newItem.first, newItem.second)
 51 |                     }
 52 |                 } else {
 53 |                     val oldItem = getItem(_activatePosition)
 54 |                     val oldPercent = getItemVisiblePercent(oldItem)
 55 |                     if (_isAutoActivate) {
 56 |                         if (oldPercent < 50) {
 57 |                             activateItem(newItem.first, newItem.second, _activatePosition)
 58 |                         } else {
 59 |                             loggerD("Current activated item visible percent >=50%, do nothing.")
 60 |                         }
 61 |                     } else {
 62 |                         loggerD("No other item need to be activated.")
 63 |                         if (oldPercent < 50) {
 64 |                             oldItem?.let { pauseItem(it, _activatePosition) }
 65 |                         } else {
 66 |                             oldItem?.let { resumeItem(it, _activatePosition) }
 67 |                         }
 68 |                     }
 69 |                 }
 70 |             }
 71 |         }
 72 | 
 73 |         /**
 74 |          * 此处做闭关操作不准确
 75 |          * 因此在[onChildViewDetachedFromWindow]中会再次检查，如果有激活的立即关闭
 76 |          */
 77 |         override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
 78 |             if (dx != 0 || dy != 0) {
 79 |                 isScrolled = true
 80 |                 //有已激活的Item，检查其可见范围
 81 |                 if (hasActivateItem()) {
 82 |                     val item = getItem(_activatePosition)
 83 |                     if (item != null) {
 84 |                         val percent = getItemVisiblePercent(item)
 85 |                         loggerD("Current activated item visible percent is $percent%.")
 86 |                         if (percent == 0) {
 87 |                             deactivateItem(item, _activatePosition)
 88 |                         }
 89 |                     }
 90 |                 }
 91 |             }
 92 |         }
 93 |     }
 94 | 
 95 |     override fun onChildViewAttachedToWindow(view: View) {
 96 |         //NO OP
 97 |     }
 98 | 
 99 |     override fun onChildViewDetachedFromWindow(view: View) {
100 |         if (hasActivateItem()) {
101 |             val detachedPosition = _recyclerView?.getChildAdapterPosition(view) ?: RecyclerView.NO_POSITION
102 |             if (isActivateItem(detachedPosition)) {
103 |                 deactivateItem(view, detachedPosition)
104 |             }
105 |         }
106 |     }
107 | 
108 |     /**
109 |      * 将[ItemVisibilityHelper]附加到[recyclerView]。
110 |      * 如果未指定[targetViewId]，[ItemVisibilityHelper]会以整个Item的高度进行可见范围的计算。
111 |      */
112 |     fun attachToRecyclerView(
113 |         recyclerView: RecyclerView,
114 |         @IdRes targetViewId: Int = View.NO_ID,
115 |         autoActivate: Boolean = true,
116 |         @RecyclerView.Orientation orientation: Int = RecyclerView.VERTICAL,
117 |         reverseLayout: Boolean = false,
118 |         listener: ItemStateChangeListener.() -> Unit
119 |     ) {
120 |         if (_recyclerView === recyclerView) return
121 |         removeListener()
122 |         _recyclerView = recyclerView
123 |         when (recyclerView.layoutManager) {
124 |             is LinearLayoutManager -> {
125 |                 _orientation = (recyclerView.layoutManager as LinearLayoutManager).orientation
126 |                 _isReverseLayout = (recyclerView.layoutManager as LinearLayoutManager).reverseLayout
127 |             }
128 | 
129 |             is StaggeredGridLayoutManager -> {
130 |                 _orientation = (recyclerView.layoutManager as StaggeredGridLayoutManager).orientation
131 |                 _isReverseLayout = (recyclerView.layoutManager as StaggeredGridLayoutManager).reverseLayout
132 |             }
133 | 
134 |             else -> {
135 |                 _orientation = orientation
136 |                 _isReverseLayout = reverseLayout
137 |             }
138 |         }
139 |         _targetViewId = targetViewId
140 |         _isAutoActivate = autoActivate
141 |         setupListener(listener)
142 |         loggerI(
143 |             "ItemVisibilityHelper was attached to RecyclerView.\n" +
144 |                     "Has targetViewId: ${targetViewId != View.NO_ID}.\n" +
145 |                     "AutoActivate: $autoActivate.\n" +
146 |                     "Orientation: ${if (_orientation == RecyclerView.VERTICAL) "Vertical" else "Horizontal"}.\n" +
147 |                     "ReverseLayout: $_isReverseLayout."
148 |         )
149 |     }
150 | 
151 |     /**
152 |      * 激活显示范围中可见百分比最大的Item
153 |      */
154 |     fun activateItem() {
155 |         if (hasActivateItem()) {
156 |             loggerD("Current has an activated item.")
157 |             return
158 |         }
159 |         val newItem: Pair<View, Int> = findNewItem()
160 |         activateItem(newItem.first, newItem.second, _activatePosition)
161 |     }
162 | 
163 |     /**
164 |      * 激活指定[position]的Item
165 |      */
166 |     fun activateItem(position: Int) {
167 |         if (isActivateItem(position)) {
168 |             loggerD("Current item was activated.")
169 |             return
170 |         }
171 |         activateItem(getItem(position), position, _activatePosition)
172 |     }
173 | 
174 |     /**
175 |      * 关闭已激活的Item
176 |      */
177 |     fun deactivateItem() {
178 |         if (!hasActivateItem()) {
179 |             loggerD("Has not any activated item.")
180 |             return
181 |         }
182 |         getItem(_activatePosition)?.let { deactivateItem(it, _activatePosition) }
183 |     }
184 | 
185 |     private fun activateItem(view: View?, newPosition: Int, oldPosition: Int) {
186 |         if (getItemVisiblePercent(view) < 50 || view == null) {
187 |             loggerD("Prepared item visible percent <50%, shouldn't activate it.")
188 |             return
189 |         }
190 |         getItem(oldPosition)?.let { deactivateItem(it, oldPosition) }
191 |         _activatePosition = newPosition
192 |         _itemStateChangeListener?.onActivateItem(view, newPosition)
193 |         loggerI("Activated item with position $newPosition.")
194 |     }
195 | 
196 |     private fun deactivateItem(view: View, position: Int) {
197 |         _activatePosition = RecyclerView.NO_POSITION
198 |         _isPauseState = false
199 |         _itemStateChangeListener?.onDeactivateItem(view, position)
200 |         loggerI("Deactivated item with position $position.")
201 |     }
202 | 
203 |     private fun pauseItem(view: View, position: Int) {
204 |         if (!_isPauseState) {
205 |             _isPauseState = true
206 |             _itemStateChangeListener?.onPauseItem(view, position)
207 |             loggerI("Paused item with position $position.")
208 |         }
209 |     }
210 | 
211 |     private fun resumeItem(view: View, position: Int) {
212 |         if (_isPauseState) {
213 |             _isPauseState = false
214 |             _itemStateChangeListener?.onResumeItem(view, position)
215 |             loggerI("Resumed item with position $position.")
216 |         }
217 |     }
218 | 
219 |     /**
220 |      * 向下寻找可见范围最大的Item，从[firstPosition]到[lastPosition]。
221 |      * 如果可见范围等于100则立即返回此Item。否则做比较，返回可见范围最大的Item及其Position。
222 |      * 如果可见范围等于0，则认为没有找到。
223 |      */
224 |     private fun findNextMostVisibleItem(firstPosition: Int, lastPosition: Int): Pair<View, Int> {
225 |         loggerD("Find next: from $firstPosition to $lastPosition.")
226 |         var max = 0
227 |         var position = RecyclerView.NO_POSITION
228 |         for (index in firstPosition..lastPosition) {
229 |             val item = getItem(index)
230 |             val percent = getItemVisiblePercent(item)
231 |             if (percent == 100) {
232 |                 loggerD("Find next: position=$index max=100 return.")
233 |                 return Pair.create(item, index)
234 |             }
235 |             if (max < percent) {
236 |                 max = percent
237 |                 position = index
238 |             }
239 |             loggerD("Find next: position=$index max=$percent.")
240 |         }
241 |         if (max > 0) {
242 |             loggerD("Find next: return position $position.")
243 |             return Pair.create(getItem(position), position)
244 |         }
245 |         loggerD("Find next: not found.")
246 |         return Pair.create(null, position)
247 |     }
248 | 
249 |     /**
250 |      * 向上寻找可见范围最大的Item，从[lastPosition]到[firstPosition]。
251 |      * 如果可见范围等于100则立即返回此Item。否则做比较，返回可见范围最大的Item及其Position。
252 |      * 如果可见范围等于0，则认为没有找到。
253 |      */
254 |     private fun findLastMostVisibleItem(lastPosition: Int, firstPosition: Int): Pair<View, Int> {
255 |         loggerD("Find last: from $lastPosition to $firstPosition.")
256 |         var max = 0
257 |         var position = RecyclerView.NO_POSITION
258 |         for (index in lastPosition downTo firstPosition) {
259 |             val item = getItem(index)
260 |             val percent = getItemVisiblePercent(item)
261 |             if (percent == 100) {
262 |                 loggerD("Find last: position=$index max=100 return.")
263 |                 return Pair.create(item, index)
264 |             }
265 |             if (max < percent) {
266 |                 max = percent
267 |                 position = index
268 |             }
269 |             loggerD("Find last: position=$index max=$percent.")
270 |         }
271 |         if (max > 0) {
272 |             loggerD("Find last: return position $position.")
273 |             return Pair.create(getItem(position), position)
274 |         }
275 |         loggerD("Find last: not found.")
276 |         return Pair.create(null, position)
277 |     }
278 | 
279 |     /**
280 |      * 计算[view]可见百分比。
281 |      */
282 |     private fun calculateVisiblePercent(view: View?): Int {
283 |         if (view == null) return 0
284 |         if (view.getLocalVisibleRect(outRect)) {
285 |             val viewHeight: Int = if (_orientation == RecyclerView.HORIZONTAL)
286 |                 view.width else view.height
287 |             val displayHeight: Int = if (_orientation == RecyclerView.HORIZONTAL) {
288 |                 _recyclerView?.computeHorizontalScrollExtent() ?: 0
289 |             } else {
290 |                 _recyclerView?.computeVerticalScrollExtent() ?: 0
291 |             }
292 |             if (viewHeight == 0 || displayHeight == 0) return 0
293 |             //outRect.top==outRect.left
294 |             val top: Int = if (_orientation == RecyclerView.HORIZONTAL)
295 |                 outRect.left else outRect.top
296 |             //outRect.bottom==outRect.right
297 |             val bottom: Int = if (_orientation == RecyclerView.HORIZONTAL)
298 |                 outRect.right else outRect.bottom
299 |             /*哪一边被遮挡的多则认为更靠近那一边。例如，顶部被遮挡的大于底部被遮挡的，则认为view的位置更靠近顶部。
300 |               有可能顶部和底部被遮挡的一样则默认view更靠近顶部。
301 |               实际上也无关紧要，因为出现相等的情况发生在，
302 |               1、view高度大于显示高度且view正好在显示范围的正中，顶部和底部的遮挡范围相同，
303 |               2、view高度小于等于显示范围高度，此时顶部和底部都没有被遮挡，顶部和底部的遮挡范围都为0，
304 |               此时不会发生激活Item动作，不影响我们去判断是更靠近顶部还是底部。
305 |               而随着view的滑动总有一边会被遮挡或遮挡范围不一致，进而能准确判断出是更靠近顶部还是底部。*/
306 |             //top等于顶部被遮挡的高度，(viewHeight - bottom)等于底部被遮挡的高度。
307 |             _isTopCloser = if (_isReverseLayout)
308 |                 top < (viewHeight - bottom) else top >= (viewHeight - bottom)
309 |             //view高度大于等于显示范围高度的情况。
310 |             if (viewHeight >= displayHeight) {
311 |                 //(bottom - top)等于view在显示范围中的高度。
312 |                 return (bottom - top) * 100 / displayHeight
313 |             }
314 |             /*(top > 0)顶部被遮挡。
315 |               (viewHeight - bottom > 0)底部被遮挡。
316 |               以上条件有可能都不成立，此时view的高度小于或等于显示范围高度，并且完全在显示范围中，
317 |               因此percent默认为100。*/
318 |             var percent = 100
319 |             if (top > 0) {
320 |                 percent = (viewHeight - top) * 100 / viewHeight
321 |             } else if (viewHeight - bottom > 0) {
322 |                 percent = bottom * 100 / viewHeight
323 |             }
324 |             return percent
325 |         }
326 |         return 0
327 |     }
328 | 
329 |     private fun findNewItem(): Pair<View, Int> {
330 |         _recyclerView?.let {
331 |             val firstPosition = it.getChildAdapterPosition(it.getChildAt(0))
332 |             val lastPosition = it.getChildAdapterPosition(it.getChildAt(it.childCount - 1))
333 |             return if (_isTopCloser) {
334 |                 findNextMostVisibleItem(firstPosition, lastPosition)
335 |             } else {
336 |                 findLastMostVisibleItem(lastPosition, firstPosition)
337 |             }
338 |         }
339 |         return Pair.create(null, RecyclerView.NO_POSITION)
340 |     }
341 | 
342 |     private fun getItem(position: Int): View? =
343 |         _recyclerView?.layoutManager?.findViewByPosition(position)
344 | 
345 |     private fun getItemVisiblePercent(item: View?): Int {
346 |         if (_targetViewId != View.NO_ID) {
347 |             return calculateVisiblePercent(item?.findViewById(_targetViewId))
348 |         }
349 |         return calculateVisiblePercent(item)
350 |     }
351 | 
352 |     private fun hasActivateItem(): Boolean = _activatePosition != RecyclerView.NO_POSITION
353 | 
354 |     private fun isActivateItem(position: Int): Boolean = _activatePosition == position
355 | 
356 |     private fun setupListener(listener: ItemStateChangeListener.() -> Unit) {
357 |         _recyclerView?.addOnScrollListener(scrollListener)
358 |         _recyclerView?.addOnChildAttachStateChangeListener(this)
359 |         val itemStateChangeListener = ItemStateChangeListener()
360 |         itemStateChangeListener.listener()
361 |         _itemStateChangeListener = itemStateChangeListener
362 |     }
363 | 
364 |     private fun removeListener() {
365 |         _recyclerView?.removeOnScrollListener(scrollListener)
366 |         _recyclerView?.removeOnChildAttachStateChangeListener(this)
367 |         _itemStateChangeListener = null
368 |     }
369 | }


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