4 |
5 | ## What? 🤔
6 | It is not a custom `TabLayout` or `RecyclerView`. It is just a helper library to attach to your `RecyclerView` with your `TabLayout`. If you don't want to go with sticky header `RecyclerView` or something like that, and also want to provide a good experience when your user is scrolling the content, this small library is for you.
7 |
8 | ## How? 🤨
9 |
10 | You fetch your product list and their categories. All you need to do is calcualate start index for all categories. Attacher will do the rest.
11 |
12 | If your backend guy returns this json,
13 | ```json
14 | CategoryA -> 10 items (between 0..10)
15 | CategoryB -> 20 items (between 10..30)
16 | CategoryC -> 30 items (between 30..60)
17 | ```
18 |
19 | Then your offset list will be,
20 |
21 | ```kotlin
22 | //3 tabs and their offset indexes in total list.
23 | val categoryIndexOffsetList = [0,10,30]
24 | ```
25 |
26 | ## Then? 🙄
27 |
28 | Then you attach.
29 | ```kotlin
30 | val attacher = TabScrollAttacher(tabLayout, recyclerView, categoryIndexOffsetList)
31 | attacher.attach()
32 | ```
33 |
34 | Detach when you don't need anymore.
35 | ```kotlin
36 | attacher.detach()
37 | ```
38 |
39 | ## Configure? 🧑🔧
40 |
41 | * `scrollDirectly()`: If you don't want to see the scrolling process, use it.
42 | * `scrollSmoothly()`: If you want to see the flowing items while scrolling, this is for you.
43 | * `scrollSmoothly(limit = 10)`: If you have a lot of items and smooth scrolling takes too long, you can set a scrolling item limit. It will scroll directly until the `limit` items left, then rest of the items will scroll smoothly.
44 | ```kotlin
45 | TabScrollAttacher(tabLayout, recyclerView, categoryIndexOffsetList) {
46 | // Configuration
47 | }
48 | ```
49 |
50 | ## Where? 🤩
51 |
52 | ```gradle
53 | maven { url 'https://jitpack.io' }
54 | ```
55 |
56 | ```gradle
57 | dependencies {
58 | compile 'com.github.iammert:TabScrollAttacher:1.0.2'
59 | }
60 | ```
61 |
62 | ## When? 😇
63 |
64 | When you have `LinearLayoutManager`, `GridLayoutManager` in any orientation (horizontal or vertical) you can use this library.
65 |
66 |
67 |
68 |
69 |
70 |
71 |
72 |
73 |
74 | ## Who? 👻
75 |
76 | License
77 | --------
78 |
79 |
80 | Copyright 2019 Mert Şimşek
81 |
82 | Licensed under the Apache License, Version 2.0 (the "License");
83 | you may not use this file except in compliance with the License.
84 | You may obtain a copy of the License at
85 |
86 | http://www.apache.org/licenses/LICENSE-2.0
87 |
88 | Unless required by applicable law or agreed to in writing, software
89 | distributed under the License is distributed on an "AS IS" BASIS,
90 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
91 | See the License for the specific language governing permissions and
92 | limitations under the License.
93 |
94 |
95 |
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/app/.gitignore:
--------------------------------------------------------------------------------
1 | # Built application files
2 | *.apk
3 | *.aar
4 | *.ap_
5 | *.aab
6 |
7 | # Files for the ART/Dalvik VM
8 | *.dex
9 |
10 | # Java class files
11 | *.class
12 |
13 | # Generated files
14 | bin/
15 | gen/
16 | out/
17 | # Uncomment the following line in case you need and you don't have the release build type files in your app
18 | # release/
19 |
20 | # Gradle files
21 | .gradle/
22 | build/
23 |
24 | # Local configuration file (sdk path, etc)
25 | local.properties
26 |
27 | # Proguard folder generated by Eclipse
28 | proguard/
29 |
30 | # Log Files
31 | *.log
32 |
33 | # Android Studio Navigation editor temp files
34 | .navigation/
35 |
36 | # Android Studio captures folder
37 | captures/
38 |
39 | # IntelliJ
40 | *.iml
41 | .idea/workspace.xml
42 | .idea/tasks.xml
43 | .idea/gradle.xml
44 | .idea/assetWizardSettings.xml
45 | .idea/dictionaries
46 | .idea/libraries
47 | # Android Studio 3 in .gitignore file.
48 | .idea/caches
49 | .idea/modules.xml
50 | # Comment next line if keeping position of elements in Navigation Editor is relevant for you
51 | .idea/navEditor.xml
52 |
53 | # Keystore files
54 | # Uncomment the following lines if you do not want to check your keystore files in.
55 | #*.jks
56 | #*.keystore
57 |
58 | # External native build folder generated in Android Studio 2.2 and later
59 | .externalNativeBuild
60 | .cxx/
61 |
62 | # Google Services (e.g. APIs or Firebase)
63 | # google-services.json
64 |
65 | # Freeline
66 | freeline.py
67 | freeline/
68 | freeline_project_description.json
69 |
70 | # fastlane
71 | fastlane/report.xml
72 | fastlane/Preview.html
73 | fastlane/screenshots
74 | fastlane/test_output
75 | fastlane/readme.md
76 |
77 | # Version control
78 | vcs.xml
79 |
80 | # lint
81 | lint/intermediates/
82 | lint/generated/
83 | lint/outputs/
84 | lint/tmp/
85 | # lint/reports/
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/app/build.gradle:
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1 | apply plugin: 'com.android.application'
2 |
3 | apply plugin: 'kotlin-android'
4 |
5 | apply plugin: 'kotlin-android-extensions'
6 |
7 | android {
8 | compileSdkVersion 29
9 | buildToolsVersion "29.0.2"
10 | defaultConfig {
11 | applicationId "com.iammert.tabscrollattacher"
12 | minSdkVersion 15
13 | targetSdkVersion 29
14 | versionCode 1
15 | versionName "1.0"
16 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
17 | }
18 |
19 | buildTypes {
20 | release {
21 | minifyEnabled false
22 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
23 | }
24 | }
25 | }
26 |
27 | dependencies {
28 | implementation fileTree(dir: 'libs', include: ['*.jar'])
29 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
30 | implementation 'androidx.appcompat:appcompat:1.1.0'
31 | implementation 'androidx.core:core-ktx:1.1.0'
32 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
33 | testImplementation 'junit:junit:4.13'
34 | androidTestImplementation 'androidx.test:runner:1.2.0'
35 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
36 |
37 | implementation 'androidx.appcompat:appcompat:1.1.0'
38 | implementation "androidx.recyclerview:recyclerview:1.1.0"
39 | implementation 'com.google.android.material:material:1.1.0'
40 |
41 | implementation 'com.squareup.picasso:picasso:2.71828'
42 |
43 | implementation project(path: ':tabscrollattacherlib')
44 | }
45 |
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/app/proguard-rules.pro:
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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
22 |
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/app/src/androidTest/java/com/iammert/tabscrollattacher/ExampleInstrumentedTest.kt:
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1 | package com.iammert.tabscrollattacher
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.iammert.tabscrollattacher", appContext.packageName)
23 | }
24 | }
25 |
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/app/src/main/AndroidManifest.xml:
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1 |
2 |
4 |
5 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
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/app/src/main/java/com/iammert/tabscrollattacher/ItemListAdapter.kt:
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1 | package com.iammert.tabscrollattacher
2 |
3 | import android.view.LayoutInflater
4 | import android.view.View
5 | import android.view.ViewGroup
6 | import androidx.recyclerview.widget.RecyclerView
7 | import com.iammert.tabscrollattacher.data.Item
8 |
9 | class ItemListAdapter : RecyclerView.Adapter() {
10 |
11 | private val itemList = arrayListOf()
12 |
13 | fun setItems(itemList: List) {
14 | this.itemList.clear()
15 | this.itemList.addAll(itemList)
16 | notifyDataSetChanged()
17 | }
18 |
19 | override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ItemViewHolder =
20 | ItemViewHolder.create(parent)
21 |
22 | override fun getItemCount(): Int = itemList.size
23 |
24 | override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {}
25 |
26 | class ItemViewHolder(view: View) : RecyclerView.ViewHolder(view) {
27 |
28 | companion object {
29 |
30 | fun create(parent: ViewGroup): ItemViewHolder {
31 | val view = LayoutInflater.from(parent.context).inflate(R.layout.item, parent, false)
32 | return ItemViewHolder(view)
33 | }
34 | }
35 | }
36 | }
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/app/src/main/java/com/iammert/tabscrollattacher/MainActivity.kt:
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1 | package com.iammert.tabscrollattacher
2 |
3 | import androidx.appcompat.app.AppCompatActivity
4 | import android.os.Bundle
5 | import android.util.Log
6 | import com.iammert.tabscrollattacher.data.Category
7 | import com.iammert.tabscrollattacher.data.DataFetcher
8 | import com.iammert.tabscrollattacher.data.Item
9 | import com.iammert.tabscrollattacherlib.TabScrollAttacher
10 | import kotlinx.android.synthetic.main.activity_main.*
11 |
12 | class MainActivity : AppCompatActivity() {
13 |
14 | override fun onCreate(savedInstanceState: Bundle?) {
15 | super.onCreate(savedInstanceState)
16 | setContentView(R.layout.activity_main)
17 |
18 | val categories = DataFetcher.fetchData(applicationContext)
19 |
20 | /**
21 | * load recyclerview adapter
22 | */
23 | val adapter = ItemListAdapter()
24 | adapter.setItems(getAllItems(categories))
25 | recyclerView.adapter = adapter
26 |
27 | /**
28 | * Load tabs
29 | */
30 | TabLoader.loadTabs(tabLayout, categories)
31 |
32 | /**
33 | * SETUP ATTACHER
34 | */
35 | val indexOffsets = getCategoryIndexOffsets(categories)
36 | val attacher = TabScrollAttacher(tabLayout, recyclerView, indexOffsets) {
37 | scrollSmoothly()
38 | }
39 |
40 | attacher.attach()
41 |
42 | //attacher.detach()
43 |
44 | }
45 |
46 | /**
47 | * Calculate your index offset list.
48 | * Attacher will talk to recyclerview and tablayout
49 | * with offsets and indexes.
50 | */
51 | private fun getCategoryIndexOffsets(categories: List): List {
52 | val indexOffsetList = arrayListOf()
53 | categories.forEach { categoryItem ->
54 | if (indexOffsetList.isEmpty()) {
55 | indexOffsetList.add(0)
56 | } else {
57 | indexOffsetList.add(indexOffsetList.last() + categoryItem.itemList.size)
58 | }
59 | }
60 | return indexOffsetList
61 | }
62 |
63 | private fun getAllItems(categories: List): List {
64 | val items = arrayListOf()
65 | categories.forEach { items.addAll(it.itemList) }
66 | return items
67 | }
68 | }
69 |
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/app/src/main/java/com/iammert/tabscrollattacher/TabLoader.kt:
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1 | package com.iammert.tabscrollattacher
2 |
3 | import com.google.android.material.tabs.TabLayout
4 | import com.iammert.tabscrollattacher.data.Category
5 |
6 | object TabLoader {
7 |
8 | fun loadTabs(tabLayout: TabLayout, tabItems: List) {
9 | tabItems.forEach { tabData ->
10 | tabLayout.newTab().also { tab ->
11 | tab.text = tabData.categoryName
12 | tabLayout.addTab(tab)
13 | }
14 | }
15 | }
16 | }
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/app/src/main/java/com/iammert/tabscrollattacher/data/Category.kt:
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1 | package com.iammert.tabscrollattacher.data
2 |
3 | data class Category(val categoryId: Int, val categoryName: String, val itemList: List)
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/app/src/main/java/com/iammert/tabscrollattacher/data/DataFetcher.kt:
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1 | package com.iammert.tabscrollattacher.data
2 |
3 | import android.content.Context
4 | import com.iammert.tabscrollattacher.R
5 |
6 | object DataFetcher {
7 |
8 | fun fetchData(context: Context): List {
9 | val tabs = context.applicationContext.resources.getStringArray(R.array.tabs)
10 | val categories = arrayListOf()
11 | tabs.forEachIndexed { index, s ->
12 |
13 | val items = arrayListOf()
14 | for (i in 0..((Math.random() * 20).toInt())) {
15 | items.add(Item(i))
16 | }
17 |
18 | categories.add(Category(categoryId = index, categoryName = s, itemList = items))
19 | }
20 |
21 | return categories
22 | }
23 | }
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/app/src/main/java/com/iammert/tabscrollattacher/data/Item.kt:
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1 | package com.iammert.tabscrollattacher.data
2 |
3 | data class Item(val itemId: Int)
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/app/src/main/res/values/colors.xml:
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1 |
2 |
3 | #222222
4 | #111111
5 | #eeeeee
6 |
7 | #ffffff
8 | #999999
9 |
10 |
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/app/src/main/res/values/dimens.xml:
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1 |
2 |
3 | 56dp
4 |
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/app/src/main/res/values/strings.xml:
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1 |
2 | TabScrollAttacher
3 |
4 |
5 | Smiley & People
6 | Animals
7 | Food & Drink
8 | Activity
9 | Travel & Places
10 | Flags
11 |
12 |
13 |
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/app/src/main/res/values/styles.xml:
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1 |
2 |
3 |
4 |
10 |
11 |
12 |
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/app/src/test/java/com/iammert/tabscrollattacher/ExampleUnitTest.kt:
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1 | package com.iammert.tabscrollattacher
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 | }
18 |
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/build.gradle:
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1 | // Top-level build file where you can add configuration options common to all sub-projects/modules.
2 |
3 | buildscript {
4 | ext.kotlin_version = '1.3.61'
5 | repositories {
6 | google()
7 | jcenter()
8 |
9 | }
10 | dependencies {
11 | classpath 'com.android.tools.build:gradle:3.5.3'
12 | classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
13 | // NOTE: Do not place your application dependencies here; they belong
14 | // in the individual module build.gradle files
15 | }
16 | }
17 |
18 | allprojects {
19 | repositories {
20 | google()
21 | jcenter()
22 |
23 | }
24 | }
25 |
26 | task clean(type: Delete) {
27 | delete rootProject.buildDir
28 | }
29 |
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/gradle.properties:
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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=-Xmx1536m
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 | # Automatically convert third-party libraries to use AndroidX
19 | android.enableJetifier=true
20 | # Kotlin code style for this project: "official" or "obsolete":
21 | kotlin.code.style=official
22 |
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/gradle/wrapper/gradle-wrapper.jar:
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/gradle/wrapper/gradle-wrapper.properties:
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1 | #Tue Dec 03 13:44:36 EET 2019
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | zipStoreBase=GRADLE_USER_HOME
5 | zipStorePath=wrapper/dists
6 | distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
7 |
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/gradlew:
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1 | #!/usr/bin/env sh
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Attempt to set APP_HOME
10 | # Resolve links: $0 may be a link
11 | PRG="$0"
12 | # Need this for relative symlinks.
13 | while [ -h "$PRG" ] ; do
14 | ls=`ls -ld "$PRG"`
15 | link=`expr "$ls" : '.*-> \(.*\)$'`
16 | if expr "$link" : '/.*' > /dev/null; then
17 | PRG="$link"
18 | else
19 | PRG=`dirname "$PRG"`"/$link"
20 | fi
21 | done
22 | SAVED="`pwd`"
23 | cd "`dirname \"$PRG\"`/" >/dev/null
24 | APP_HOME="`pwd -P`"
25 | cd "$SAVED" >/dev/null
26 |
27 | APP_NAME="Gradle"
28 | APP_BASE_NAME=`basename "$0"`
29 |
30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
31 | DEFAULT_JVM_OPTS=""
32 |
33 | # Use the maximum available, or set MAX_FD != -1 to use that value.
34 | MAX_FD="maximum"
35 |
36 | warn () {
37 | echo "$*"
38 | }
39 |
40 | die () {
41 | echo
42 | echo "$*"
43 | echo
44 | exit 1
45 | }
46 |
47 | # OS specific support (must be 'true' or 'false').
48 | cygwin=false
49 | msys=false
50 | darwin=false
51 | nonstop=false
52 | case "`uname`" in
53 | CYGWIN* )
54 | cygwin=true
55 | ;;
56 | Darwin* )
57 | darwin=true
58 | ;;
59 | MINGW* )
60 | msys=true
61 | ;;
62 | NONSTOP* )
63 | nonstop=true
64 | ;;
65 | esac
66 |
67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
68 |
69 | # Determine the Java command to use to start the JVM.
70 | if [ -n "$JAVA_HOME" ] ; then
71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
72 | # IBM's JDK on AIX uses strange locations for the executables
73 | JAVACMD="$JAVA_HOME/jre/sh/java"
74 | else
75 | JAVACMD="$JAVA_HOME/bin/java"
76 | fi
77 | if [ ! -x "$JAVACMD" ] ; then
78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
79 |
80 | Please set the JAVA_HOME variable in your environment to match the
81 | location of your Java installation."
82 | fi
83 | else
84 | JAVACMD="java"
85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
86 |
87 | Please set the JAVA_HOME variable in your environment to match the
88 | location of your Java installation."
89 | fi
90 |
91 | # Increase the maximum file descriptors if we can.
92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
93 | MAX_FD_LIMIT=`ulimit -H -n`
94 | if [ $? -eq 0 ] ; then
95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
96 | MAX_FD="$MAX_FD_LIMIT"
97 | fi
98 | ulimit -n $MAX_FD
99 | if [ $? -ne 0 ] ; then
100 | warn "Could not set maximum file descriptor limit: $MAX_FD"
101 | fi
102 | else
103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
104 | fi
105 | fi
106 |
107 | # For Darwin, add options to specify how the application appears in the dock
108 | if $darwin; then
109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
110 | fi
111 |
112 | # For Cygwin, switch paths to Windows format before running java
113 | if $cygwin ; then
114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
116 | JAVACMD=`cygpath --unix "$JAVACMD"`
117 |
118 | # We build the pattern for arguments to be converted via cygpath
119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 | SEP=""
121 | for dir in $ROOTDIRSRAW ; do
122 | ROOTDIRS="$ROOTDIRS$SEP$dir"
123 | SEP="|"
124 | done
125 | OURCYGPATTERN="(^($ROOTDIRS))"
126 | # Add a user-defined pattern to the cygpath arguments
127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 | fi
130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 | i=0
132 | for arg in "$@" ; do
133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
135 |
136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 | else
139 | eval `echo args$i`="\"$arg\""
140 | fi
141 | i=$((i+1))
142 | done
143 | case $i in
144 | (0) set -- ;;
145 | (1) set -- "$args0" ;;
146 | (2) set -- "$args0" "$args1" ;;
147 | (3) set -- "$args0" "$args1" "$args2" ;;
148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 | esac
155 | fi
156 |
157 | # Escape application args
158 | save () {
159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
160 | echo " "
161 | }
162 | APP_ARGS=$(save "$@")
163 |
164 | # Collect all arguments for the java command, following the shell quoting and substitution rules
165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
166 |
167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
169 | cd "$(dirname "$0")"
170 | fi
171 |
172 | exec "$JAVACMD" "$@"
173 |
--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | set DIRNAME=%~dp0
12 | if "%DIRNAME%" == "" set DIRNAME=.
13 | set APP_BASE_NAME=%~n0
14 | set APP_HOME=%DIRNAME%
15 |
16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
17 | set DEFAULT_JVM_OPTS=
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windows variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 |
53 | :win9xME_args
54 | @rem Slurp the command line arguments.
55 | set CMD_LINE_ARGS=
56 | set _SKIP=2
57 |
58 | :win9xME_args_slurp
59 | if "x%~1" == "x" goto execute
60 |
61 | set CMD_LINE_ARGS=%*
62 |
63 | :execute
64 | @rem Setup the command line
65 |
66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
67 |
68 | @rem Execute Gradle
69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
70 |
71 | :end
72 | @rem End local scope for the variables with windows NT shell
73 | if "%ERRORLEVEL%"=="0" goto mainEnd
74 |
75 | :fail
76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
77 | rem the _cmd.exe /c_ return code!
78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
79 | exit /b 1
80 |
81 | :mainEnd
82 | if "%OS%"=="Windows_NT" endlocal
83 |
84 | :omega
85 |
--------------------------------------------------------------------------------
/settings.gradle:
--------------------------------------------------------------------------------
1 | include ':app', ':tabscrollattacherlib'
2 | rootProject.name='TabScrollAttacher'
3 |
--------------------------------------------------------------------------------
/tabscrollattacherlib/.gitignore:
--------------------------------------------------------------------------------
1 | # Built application files
2 | *.apk
3 | *.aar
4 | *.ap_
5 | *.aab
6 |
7 | # Files for the ART/Dalvik VM
8 | *.dex
9 |
10 | # Java class files
11 | *.class
12 |
13 | # Generated files
14 | bin/
15 | gen/
16 | out/
17 | # Uncomment the following line in case you need and you don't have the release build type files in your app
18 | # release/
19 |
20 | # Gradle files
21 | .gradle/
22 | build/
23 |
24 | # Local configuration file (sdk path, etc)
25 | local.properties
26 |
27 | # Proguard folder generated by Eclipse
28 | proguard/
29 |
30 | # Log Files
31 | *.log
32 |
33 | # Android Studio Navigation editor temp files
34 | .navigation/
35 |
36 | # Android Studio captures folder
37 | captures/
38 |
39 | # IntelliJ
40 | *.iml
41 | .idea/workspace.xml
42 | .idea/tasks.xml
43 | .idea/gradle.xml
44 | .idea/assetWizardSettings.xml
45 | .idea/dictionaries
46 | .idea/libraries
47 | # Android Studio 3 in .gitignore file.
48 | .idea/caches
49 | .idea/modules.xml
50 | # Comment next line if keeping position of elements in Navigation Editor is relevant for you
51 | .idea/navEditor.xml
52 |
53 | # Keystore files
54 | # Uncomment the following lines if you do not want to check your keystore files in.
55 | #*.jks
56 | #*.keystore
57 |
58 | # External native build folder generated in Android Studio 2.2 and later
59 | .externalNativeBuild
60 | .cxx/
61 |
62 | # Google Services (e.g. APIs or Firebase)
63 | # google-services.json
64 |
65 | # Freeline
66 | freeline.py
67 | freeline/
68 | freeline_project_description.json
69 |
70 | # fastlane
71 | fastlane/report.xml
72 | fastlane/Preview.html
73 | fastlane/screenshots
74 | fastlane/test_output
75 | fastlane/readme.md
76 |
77 | # Version control
78 | vcs.xml
79 |
80 | # lint
81 | lint/intermediates/
82 | lint/generated/
83 | lint/outputs/
84 | lint/tmp/
85 | # lint/reports/
--------------------------------------------------------------------------------
/tabscrollattacherlib/build.gradle:
--------------------------------------------------------------------------------
1 | apply plugin: 'com.android.library'
2 | apply plugin: 'kotlin-android'
3 | apply plugin: 'kotlin-android-extensions'
4 | android {
5 | compileSdkVersion 29
6 | buildToolsVersion "29.0.2"
7 |
8 |
9 | defaultConfig {
10 | minSdkVersion 15
11 | targetSdkVersion 29
12 | versionCode 1
13 | versionName "1.0"
14 |
15 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
16 | consumerProguardFiles 'consumer-rules.pro'
17 | }
18 |
19 | buildTypes {
20 | release {
21 | minifyEnabled false
22 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
23 | }
24 | }
25 | }
26 |
27 | dependencies {
28 | implementation fileTree(dir: 'libs', include: ['*.jar'])
29 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
30 | implementation 'androidx.appcompat:appcompat:1.1.0'
31 |
32 | testImplementation 'junit:junit:4.13'
33 | implementation 'androidx.core:core-ktx:1.2.0'
34 | androidTestImplementation 'androidx.test:runner:1.2.0'
35 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
36 |
37 | implementation "androidx.recyclerview:recyclerview:1.1.0"
38 | implementation 'com.google.android.material:material:1.1.0'
39 | }
40 |
--------------------------------------------------------------------------------
/tabscrollattacherlib/consumer-rules.pro:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/iammert/TabScrollAttacher/75b40b399db307547435efdbd961aa4430f61a65/tabscrollattacherlib/consumer-rules.pro
--------------------------------------------------------------------------------
/tabscrollattacherlib/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
22 |
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/androidTest/java/com/iammert/tabscrollattacherlib/ExampleInstrumentedTest.kt:
--------------------------------------------------------------------------------
1 | package com.iammert.tabscrollattacherlib
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.iammert.tabscrollattacherlib.test", appContext.packageName)
23 | }
24 | }
25 |
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
1 |
3 |
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/main/java/com/iammert/tabscrollattacherlib/AttacherState.kt:
--------------------------------------------------------------------------------
1 | package com.iammert.tabscrollattacherlib
2 |
3 | enum class AttacherState {
4 | IDLE,
5 | TAB_SELECTED,
6 | RECYCLERVIEW_SCROLLING
7 | }
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/main/java/com/iammert/tabscrollattacherlib/RecyclerViewExt.kt:
--------------------------------------------------------------------------------
1 | package com.iammert.tabscrollattacherlib
2 |
3 | import androidx.recyclerview.widget.LinearLayoutManager
4 | import androidx.recyclerview.widget.RecyclerView
5 |
6 | internal fun RecyclerView.scrollToPosition(position: Int, scrollMethod: ScrollMethod) {
7 | when (scrollMethod) {
8 | is ScrollMethod.Direct -> scrollToPosition(position)
9 | is ScrollMethod.Smooth -> smoothScrollToPosition(position)
10 | is ScrollMethod.LimitedSmooth -> smoothScrollToPosition(position, scrollMethod.limit)
11 | }
12 | }
13 |
14 | private fun RecyclerView.smoothScrollToPosition(position: Int, scrollLimit: Int) {
15 | layoutManager?.apply {
16 | when (this) {
17 | is LinearLayoutManager -> {
18 | val topItem = findFirstVisibleItemPosition()
19 | val distance = topItem - position
20 | val anchorItem = when {
21 | distance > scrollLimit -> position + scrollLimit
22 | distance < -scrollLimit -> position - scrollLimit
23 | else -> topItem
24 | }
25 | if (anchorItem != topItem) scrollToPosition(anchorItem)
26 | post {
27 | smoothScrollToPosition(position)
28 | }
29 | }
30 | else -> smoothScrollToPosition(position)
31 | }
32 | }
33 | }
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/main/java/com/iammert/tabscrollattacherlib/ScrollMethod.kt:
--------------------------------------------------------------------------------
1 | package com.iammert.tabscrollattacherlib
2 |
3 | internal sealed class ScrollMethod {
4 | object Direct : ScrollMethod()
5 | object Smooth : ScrollMethod()
6 | class LimitedSmooth(val limit: Int) : ScrollMethod()
7 | }
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/main/java/com/iammert/tabscrollattacherlib/SimpleTabSelectedListener.kt:
--------------------------------------------------------------------------------
1 | package com.iammert.tabscrollattacherlib
2 |
3 | import com.google.android.material.tabs.TabLayout
4 |
5 | open class SimpleTabSelectedListener : TabLayout.OnTabSelectedListener {
6 | override fun onTabReselected(p0: TabLayout.Tab?) {
7 | }
8 |
9 | override fun onTabUnselected(p0: TabLayout.Tab?) {
10 | }
11 |
12 | override fun onTabSelected(p0: TabLayout.Tab?) {
13 | }
14 | }
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/main/java/com/iammert/tabscrollattacherlib/TabScrollAttacher.kt:
--------------------------------------------------------------------------------
1 | package com.iammert.tabscrollattacherlib
2 |
3 | import android.annotation.SuppressLint
4 | import android.util.Log
5 | import androidx.recyclerview.widget.LinearLayoutManager
6 | import androidx.recyclerview.widget.RecyclerView
7 | import com.google.android.material.tabs.TabLayout
8 |
9 | class TabScrollAttacher(
10 | private val tabLayout: TabLayout,
11 | private val recyclerView: RecyclerView,
12 | private val tabStartIndexOffsets: List,
13 | configuration: Configuration.() -> Unit = {}
14 | ) {
15 |
16 | private lateinit var layoutManager: LinearLayoutManager
17 |
18 | private lateinit var config: Configuration
19 |
20 | private var attacherState = AttacherState.IDLE
21 |
22 | private var isAttached = false
23 |
24 | private var scrollListener = object : RecyclerView.OnScrollListener() {
25 | override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
26 | super.onScrolled(recyclerView, dx, dy)
27 |
28 | if (attacherState == AttacherState.TAB_SELECTED) {
29 | return
30 | }
31 |
32 | val isScrolling = dx != 0 || dy != 0
33 | if (attacherState == AttacherState.IDLE && isScrolling) {
34 | attacherState = AttacherState.RECYCLERVIEW_SCROLLING
35 | }
36 |
37 | val calculatedRecyclerViewItemPosition = when {
38 | layoutManager.findLastVisibleItemPosition() == layoutManager.itemCount - 1 -> layoutManager.findLastVisibleItemPosition()
39 | layoutManager.findFirstVisibleItemPosition() == 0 -> layoutManager.findFirstVisibleItemPosition()
40 | else -> findMidVisibleRecyclerItemPosition()
41 | }
42 |
43 | val tabIndex = getTabIndex(calculatedRecyclerViewItemPosition)
44 | if (tabIndex != tabLayout.selectedTabPosition) {
45 | tabLayout.getTabAt(tabIndex)?.select()
46 | }
47 | }
48 |
49 | override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
50 | super.onScrollStateChanged(recyclerView, newState)
51 | if (newState == RecyclerView.SCROLL_STATE_IDLE) {
52 | attacherState = AttacherState.IDLE
53 | }
54 | }
55 | }
56 |
57 | private var tabSelectedListener = object : SimpleTabSelectedListener() {
58 | override fun onTabSelected(p0: TabLayout.Tab?) {
59 | super.onTabSelected(p0)
60 | if (attacherState != AttacherState.RECYCLERVIEW_SCROLLING) {
61 | attacherState = AttacherState.TAB_SELECTED
62 | val recyclerViewPosition = tabStartIndexOffsets[tabLayout.selectedTabPosition]
63 | recyclerView.scrollToPosition(recyclerViewPosition, config.scrollMethod)
64 | }
65 | }
66 | }
67 |
68 | init {
69 | require(recyclerView.layoutManager is LinearLayoutManager) { "Only LinearLayoutManager is supported." }
70 | layoutManager = recyclerView.layoutManager as LinearLayoutManager
71 | config = Configuration().apply(configuration)
72 | }
73 |
74 | fun detach() {
75 | if (isAttached) {
76 | recyclerView.removeOnScrollListener(scrollListener)
77 | tabLayout.removeOnTabSelectedListener(tabSelectedListener)
78 | isAttached = false
79 | }
80 | }
81 |
82 | fun attach() {
83 | if (isAttached.not()) {
84 | recyclerView.addOnScrollListener(scrollListener)
85 | tabLayout.addOnTabSelectedListener(tabSelectedListener)
86 | isAttached = true
87 | }
88 | }
89 |
90 | private fun findMidVisibleRecyclerItemPosition(): Int {
91 | val firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition()
92 | val lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition()
93 | return (firstVisibleItemPosition + lastVisibleItemPosition) / 2
94 | }
95 |
96 | private fun getTabIndex(recyclerItemPosition: Int): Int {
97 | var calculatedTabIndex = -1
98 | tabStartIndexOffsets.forEachIndexed { tabIndex, startOffset ->
99 | if (recyclerItemPosition >= startOffset) {
100 | calculatedTabIndex = tabIndex
101 | }
102 | }
103 | return calculatedTabIndex
104 | }
105 |
106 | class Configuration {
107 | internal var scrollMethod: ScrollMethod = ScrollMethod.Smooth
108 | private set
109 |
110 | fun scrollDirectly() {
111 | scrollMethod = ScrollMethod.Direct
112 | }
113 |
114 | fun scrollSmoothly(limit: Int? = null) {
115 | scrollMethod = when (limit) {
116 | null -> ScrollMethod.Smooth
117 | else -> ScrollMethod.LimitedSmooth(limit)
118 | }
119 | }
120 | }
121 |
122 | }
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/main/res/values/strings.xml:
--------------------------------------------------------------------------------
1 |
2 | tabscrollattacherlib
3 |
4 |
--------------------------------------------------------------------------------
/tabscrollattacherlib/src/test/java/com/iammert/tabscrollattacherlib/ExampleUnitTest.kt:
--------------------------------------------------------------------------------
1 | package com.iammert.tabscrollattacherlib
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 | }
18 |
--------------------------------------------------------------------------------
3 | 
68 | 
72 |