├── app ├── .gitignore ├── jpg │ └── diagram.jpg ├── gif │ └── page-recyclerview.gif ├── src │ ├── main │ │ ├── res │ │ │ ├── values │ │ │ │ ├── strings.xml │ │ │ │ ├── colors.xml │ │ │ │ └── styles.xml │ │ │ ├── mipmap-hdpi │ │ │ │ ├── ic_launcher.png │ │ │ │ └── ic_launcher_round.png │ │ │ ├── mipmap-mdpi │ │ │ │ ├── ic_launcher.png │ │ │ │ └── ic_launcher_round.png │ │ │ ├── mipmap-xhdpi │ │ │ │ ├── ic_launcher.png │ │ │ │ └── ic_launcher_round.png │ │ │ ├── mipmap-xxhdpi │ │ │ │ ├── ic_launcher.png │ │ │ │ └── ic_launcher_round.png │ │ │ ├── mipmap-xxxhdpi │ │ │ │ ├── ic_launcher.png │ │ │ │ └── ic_launcher_round.png │ │ │ ├── mipmap-anydpi-v26 │ │ │ │ ├── ic_launcher.xml │ │ │ │ └── ic_launcher_round.xml │ │ │ ├── layout │ │ │ │ ├── activity_main.xml │ │ │ │ └── item_view.xml │ │ │ ├── drawable-v24 │ │ │ │ └── ic_launcher_foreground.xml │ │ │ └── drawable │ │ │ │ └── ic_launcher_background.xml │ │ ├── AndroidManifest.xml │ │ └── java │ │ │ └── com │ │ │ └── example │ │ │ └── recyclerviewdemo │ │ │ ├── MainActivity.kt │ │ │ └── recyclerview │ │ │ ├── RvAdapter.kt │ │ │ ├── GridItemDecoration.kt │ │ │ ├── StartSnapHelper.kt │ │ │ ├── FullPagerSnapHelper.kt │ │ │ └── PagerSnapHelper.kt │ ├── test │ │ └── java │ │ │ └── com │ │ │ └── example │ │ │ └── recyclerviewdemo │ │ │ └── ExampleUnitTest.kt │ └── androidTest │ │ └── java │ │ └── com │ │ └── example │ │ └── recyclerviewdemo │ │ └── ExampleInstrumentedTest.kt ├── proguard-rules.pro └── build.gradle ├── settings.gradle ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── .idea ├── encodings.xml ├── codeStyles │ ├── codeStyleConfig.xml │ └── Project.xml ├── vcs.xml ├── inspectionProfiles │ ├── Project_Default.xml │ └── profiles_settings.xml ├── runConfigurations.xml ├── gradle.xml └── misc.xml ├── .gitignore ├── README.md ├── gradle.properties ├── gradlew.bat └── gradlew /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app' 2 | -------------------------------------------------------------------------------- /app/jpg/diagram.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/jpg/diagram.jpg -------------------------------------------------------------------------------- /app/gif/page-recyclerview.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/gif/page-recyclerview.gif -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | RecyclerViewDemo 3 | 4 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /.idea/encodings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/sirhu123/PagerRecyclerView/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /.idea/codeStyles/codeStyleConfig.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 5 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #008577 4 | #00574B 5 | #D81B60 6 | 7 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea/caches 5 | /.idea/libraries 6 | /.idea/modules.xml 7 | /.idea/workspace.xml 8 | /.idea/navEditor.xml 9 | /.idea/assetWizardSettings.xml 10 | .DS_Store 11 | /build 12 | /captures 13 | .externalNativeBuild 14 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Thu Jun 13 16:09:15 CST 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-5.1.1-all.zip 7 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | -------------------------------------------------------------------------------- /.idea/codeStyles/Project.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 6 | 7 | 9 | 10 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/inspectionProfiles/Project_Default.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 9 | -------------------------------------------------------------------------------- /app/src/test/java/com/example/recyclerviewdemo/ExampleUnitTest.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo 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 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # PagerRecyclerView 2 | 支持整页滑动的 RecyclerView，详见[博客](https://juejin.im/post/5d07a3e6e51d4510803ce3b1) 3 | 4 | gif 5 | 6 | # 第一步： 7 | - 按照正常流程创建 RecyclerView 并设置 RecyclerView.Adapter； 8 | # 第二步： 9 | - 根据 RecyclerView 的宽高控制每个 ItemView 的宽高； 10 | # 第三步： 11 | - PagerSnapHelper(itemCount : Int).attachToRecyclerView(rv : RecyclerView)； 12 | - itemCount 为每页显示的 itemView 的个数； 13 | -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/gradle.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 17 | 18 | -------------------------------------------------------------------------------- /.idea/inspectionProfiles/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /app/src/androidTest/java/com/example/recyclerviewdemo/ExampleInstrumentedTest.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo 2 | 3 | import androidx.test.InstrumentationRegistry 4 | import androidx.test.runner.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.getTargetContext() 22 | assertEquals("com.example.recyclerviewdemo", appContext.packageName) 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /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 22 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 8 | 9 | 16 | 17 | -------------------------------------------------------------------------------- /app/src/main/res/layout/item_view.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 17 | 18 | -------------------------------------------------------------------------------- /app/src/main/java/com/example/recyclerviewdemo/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo 2 | 3 | import android.os.Bundle 4 | import androidx.appcompat.app.AppCompatActivity 5 | import androidx.recyclerview.widget.GridLayoutManager 6 | import androidx.recyclerview.widget.RecyclerView 7 | import com.example.recyclerviewdemo.recyclerview.GridItemDecoration 8 | import com.example.recyclerviewdemo.recyclerview.PagerSnapHelper 9 | import com.example.recyclerviewdemo.recyclerview.RvAdapter 10 | 11 | class MainActivity : AppCompatActivity() { 12 | 13 | override fun onCreate(savedInstanceState: Bundle?) { 14 | super.onCreate(savedInstanceState) 15 | setContentView(R.layout.activity_main) 16 | 17 | val rv = findViewById(R.id.rv) 18 | val adapter = RvAdapter(this, 3) 19 | PagerSnapHelper(6).attachToRecyclerView(rv) 20 | rv.run { 21 | layoutManager = GridLayoutManager(this@MainActivity, 2, RecyclerView.HORIZONTAL, false) 22 | this.adapter = adapter 23 | addItemDecoration(GridItemDecoration(this@MainActivity)) 24 | } 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /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=-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 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | apply plugin: 'kotlin-android' 4 | 5 | apply plugin: 'kotlin-android-extensions' 6 | 7 | android { 8 | compileSdkVersion 28 9 | defaultConfig { 10 | applicationId "com.example.recyclerviewdemo" 11 | minSdkVersion 16 12 | targetSdkVersion 28 13 | versionCode 1 14 | versionName "1.0" 15 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" 16 | } 17 | buildTypes { 18 | release { 19 | minifyEnabled false 20 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 21 | } 22 | } 23 | } 24 | 25 | dependencies { 26 | implementation fileTree(dir: 'libs', include: ['*.jar']) 27 | implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 28 | implementation 'androidx.appcompat:appcompat:1.0.2' 29 | implementation 'androidx.core:core-ktx:1.0.1' 30 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3' 31 | testImplementation 'junit:junit:4.12' 32 | androidTestImplementation 'androidx.test:runner:1.1.1' 33 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1' 34 | 35 | implementation 'androidx.recyclerview:recyclerview:1.1.0-alpha06' 36 | implementation 'androidx.recyclerview:recyclerview-selection:1.1.0-alpha06' 37 | 38 | } 39 | -------------------------------------------------------------------------------- /app/src/main/java/com/example/recyclerviewdemo/recyclerview/RvAdapter.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo.recyclerview 2 | 3 | import android.content.Context 4 | import android.view.LayoutInflater 5 | import android.view.View 6 | import android.view.ViewGroup 7 | import android.widget.TextView 8 | import androidx.recyclerview.widget.RecyclerView 9 | import com.example.recyclerviewdemo.R 10 | 11 | class RvAdapter(context: Context, private val itemCountPerRowOrColumn: Int) : 12 | RecyclerView.Adapter() { 13 | 14 | private val icons = arrayOf( 15 | R.color.colorPrimaryDark, 16 | R.color.colorPrimary, 17 | R.color.colorAccent 18 | ) 19 | 20 | private var mScreenWidth: Int = 0 21 | 22 | init { 23 | mScreenWidth = context.resources.displayMetrics.widthPixels 24 | } 25 | 26 | override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RvHolder { 27 | val layoutInflater = LayoutInflater.from(parent.context) 28 | val itemView = layoutInflater.inflate(R.layout.item_view, parent, false) 29 | itemView.layoutParams = itemView.layoutParams.apply { 30 | width = (mScreenWidth - 10 * itemCountPerRowOrColumn) / itemCountPerRowOrColumn 31 | height = width * 4 / 3 32 | } 33 | return RvHolder(itemView) 34 | } 35 | 36 | override fun onBindViewHolder(holder: RvHolder, position: Int) { 37 | holder.bind(icons.random(), "hello world $position") 38 | } 39 | 40 | override fun getItemCount(): Int { 41 | return 24 42 | } 43 | 44 | class RvHolder(itemView: View) : RecyclerView.ViewHolder(itemView) { 45 | private var tv: TextView = itemView.findViewById(R.id.tv) 46 | 47 | fun bind(color: Int, text: String) { 48 | tv.text = text 49 | itemView.setBackgroundColor(itemView.resources.getColor(color)) 50 | } 51 | } 52 | } -------------------------------------------------------------------------------- /app/src/main/res/drawable-v24/ic_launcher_foreground.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | 13 | 19 | 22 | 25 | 26 | 27 | 28 | 34 | 35 | -------------------------------------------------------------------------------- /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 | -------------------------------------------------------------------------------- /app/src/main/java/com/example/recyclerviewdemo/recyclerview/GridItemDecoration.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo.recyclerview 2 | 3 | import android.content.Context 4 | import android.graphics.Canvas 5 | import android.graphics.Rect 6 | import android.graphics.drawable.ColorDrawable 7 | import android.graphics.drawable.Drawable 8 | import android.view.View 9 | import androidx.recyclerview.widget.RecyclerView 10 | 11 | class GridItemDecoration(context: Context) : RecyclerView.ItemDecoration() { 12 | private val mBounds = Rect() 13 | private var mDivider: Drawable = ColorDrawable(context.resources.getColor(android.R.color.holo_purple)) 14 | private var mDividerWidth = 10 15 | 16 | fun setDivider(divider: Drawable = mDivider, dividerWidth: Int = mDividerWidth) { 17 | mDivider = divider 18 | mDividerWidth = dividerWidth 19 | } 20 | 21 | override fun onDraw(c: Canvas, parent: RecyclerView, state: RecyclerView.State) { 22 | if (parent.layoutManager!!.canScrollHorizontally()) { 23 | drawHorizontal(c, parent) 24 | } else if (parent.layoutManager!!.canScrollVertically()) { 25 | drawVertical(c, parent) 26 | } 27 | } 28 | 29 | private fun drawHorizontal(c: Canvas, parent: RecyclerView) { 30 | c.save() 31 | val count = parent.childCount 32 | for (i in 0 until count) { 33 | val child = parent.getChildAt(i) 34 | parent.getDecoratedBoundsWithMargins(child, mBounds) 35 | //画竖线 36 | mDivider.setBounds(mBounds.right - mDividerWidth, mBounds.top, mBounds.right, mBounds.bottom) 37 | mDivider.draw(c) 38 | //画横线 39 | mDivider.setBounds(mBounds.left, mBounds.bottom - mDividerWidth, mBounds.right, mBounds.bottom) 40 | mDivider.draw(c) 41 | } 42 | c.restore() 43 | } 44 | 45 | private fun drawVertical(c: Canvas, parent: RecyclerView) { 46 | c.save() 47 | val count = parent.childCount 48 | for (i in 0 until count) { 49 | val child = parent.getChildAt(i) 50 | parent.getDecoratedBoundsWithMargins(child, mBounds) 51 | //画横线 52 | mDivider.setBounds(mBounds.left, mBounds.bottom - mDividerWidth, mBounds.right, mBounds.bottom) 53 | //画竖线 54 | mDivider.setBounds(mBounds.right - mDividerWidth, mBounds.top, mBounds.right, mBounds.bottom) 55 | mDivider.draw(c) 56 | } 57 | c.restore() 58 | } 59 | 60 | override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) { 61 | outRect.set(0, 0, mDividerWidth, mDividerWidth) 62 | } 63 | } -------------------------------------------------------------------------------- /app/src/main/java/com/example/recyclerviewdemo/recyclerview/StartSnapHelper.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo.recyclerview 2 | 3 | import android.view.View 4 | import androidx.recyclerview.widget.LinearLayoutManager 5 | import androidx.recyclerview.widget.LinearSnapHelper 6 | import androidx.recyclerview.widget.OrientationHelper 7 | import androidx.recyclerview.widget.RecyclerView 8 | 9 | class StartSnapHelper : LinearSnapHelper() { 10 | private var mHorizontalHelper: OrientationHelper? = null 11 | private var mVerticalHelper: OrientationHelper? = null 12 | 13 | override fun calculateDistanceToFinalSnap(layoutManager: RecyclerView.LayoutManager, targetView: View): IntArray? { 14 | val out = IntArray(2) 15 | if (layoutManager.canScrollHorizontally()) { 16 | out[0] = distance2Start(targetView, getHorizontalHelper(layoutManager)) 17 | out[1] = 0 18 | } else { 19 | out[0] = 0 20 | out[1] = distance2Start(targetView, getVerticalHelper(layoutManager)) 21 | } 22 | return out 23 | } 24 | 25 | private fun distance2Start( 26 | targetView: View, 27 | orientationHelper: OrientationHelper 28 | ): Int { 29 | return orientationHelper.getDecoratedStart(targetView) - orientationHelper.startAfterPadding 30 | } 31 | 32 | override fun findSnapView(layoutManager: RecyclerView.LayoutManager?): View? { 33 | println("tag=== ${layoutManager?.childCount}") 34 | if (layoutManager is LinearLayoutManager) { 35 | return if (layoutManager.canScrollHorizontally()) { 36 | getStartView(layoutManager, getHorizontalHelper(layoutManager)) 37 | } else { 38 | getStartView(layoutManager, getVerticalHelper(layoutManager)) 39 | } 40 | } 41 | return super.findSnapView(layoutManager) 42 | } 43 | 44 | private fun getStartView(layoutManager: RecyclerView.LayoutManager, orientationHelper: OrientationHelper): View? { 45 | val firstChildPos = (layoutManager as LinearLayoutManager).findFirstVisibleItemPosition() 46 | val isLastChild = layoutManager.findLastCompletelyVisibleItemPosition() == layoutManager.itemCount - 1 47 | if (firstChildPos == RecyclerView.NO_POSITION || isLastChild) return null 48 | val firstChild = layoutManager.findViewByPosition(firstChildPos) 49 | if (orientationHelper.getDecoratedEnd(firstChild) >= orientationHelper.getDecoratedMeasurement(firstChild) / 2) { 50 | return firstChild 51 | } 52 | return layoutManager.findViewByPosition(firstChildPos + 1) 53 | } 54 | 55 | private fun getHorizontalHelper(layoutManager: RecyclerView.LayoutManager): OrientationHelper { 56 | if (mHorizontalHelper == null) 57 | mHorizontalHelper = OrientationHelper.createHorizontalHelper(layoutManager) 58 | return mHorizontalHelper!! 59 | } 60 | 61 | private fun getVerticalHelper(layoutManager: RecyclerView.LayoutManager): OrientationHelper { 62 | if (mVerticalHelper == null) 63 | mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager) 64 | return mVerticalHelper!! 65 | } 66 | } -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | AccessibilityLintAndroid 17 | 18 | 19 | Ali-Check 20 | 21 | 22 | Android 23 | 24 | 25 | Compiler issuesJava 26 | 27 | 28 | CorrectnessLintAndroid 29 | 30 | 31 | Declaration redundancyJava 32 | 33 | 34 | Groovy 35 | 36 | 37 | HTML 38 | 39 | 40 | IconsUsabilityLintAndroid 41 | 42 | 43 | Internationalization issuesJava 44 | 45 | 46 | JUnit issuesJava 47 | 48 | 49 | Java 50 | 51 | 52 | Java 5Java language level migration aidsJava 53 | 54 | 55 | Java language level migration aidsJava 56 | 57 | 58 | LintAndroid 59 | 60 | 61 | Performance issuesJava 62 | 63 | 64 | PerformanceLintAndroid 65 | 66 | 67 | Portability issuesJava 68 | 69 | 70 | Probable bugsGroovy 71 | 72 | 73 | Probable bugsJava 74 | 75 | 76 | SecurityLintAndroid 77 | 78 | 79 | Serialization issuesJava 80 | 81 | 82 | Threading issuesJava 83 | 84 | 85 | UsabilityLintAndroid 86 | 87 | 88 | 89 | 90 | SerializableHasSerialVersionUIDField 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 102 | -------------------------------------------------------------------------------- /app/src/main/java/com/example/recyclerviewdemo/recyclerview/FullPagerSnapHelper.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo.recyclerview 2 | 3 | import androidx.recyclerview.widget.RecyclerView 4 | import kotlin.math.absoluteValue 5 | 6 | class FullPagerSnapHelper { 7 | private var mRecyclerView: RecyclerView? = null 8 | private var mHalfItemWidth = 0 9 | private var mFullPageWidth = 0 10 | private var mScrolled = false 11 | 12 | private val mScrollListener = object : RecyclerView.OnScrollListener() { 13 | private var mTotalScrolledX = 0 14 | private var mTotalScrolledY = 0 15 | 16 | override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) { 17 | super.onScrollStateChanged(recyclerView, newState) 18 | println("tag=== onScrollStateChanged, state: $newState") 19 | if (newState == RecyclerView.SCROLL_STATE_DRAGGING) { 20 | mScrolled = true 21 | } 22 | if (newState == RecyclerView.SCROLL_STATE_IDLE) { 23 | if (mScrolled) { 24 | mScrolled = false 25 | if (mTotalScrolledX.absoluteValue > 0 || mTotalScrolledY.absoluteValue > 0) { 26 | snapToTargetExistingView(mTotalScrolledX, mTotalScrolledY) 27 | } 28 | } 29 | mTotalScrolledX = 0 30 | mTotalScrolledY = 0 31 | } 32 | } 33 | 34 | override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) { 35 | mTotalScrolledX += dx 36 | mTotalScrolledY += dy 37 | } 38 | } 39 | 40 | private val onFlingListener = object : RecyclerView.OnFlingListener() { 41 | override fun onFling(velocityX: Int, velocityY: Int): Boolean { 42 | println("tag=== onFling, vX: $velocityX, vY: $velocityY") 43 | return false 44 | } 45 | } 46 | 47 | @Throws(IllegalStateException::class) 48 | fun attachToRecyclerView(recyclerView: RecyclerView) { 49 | recyclerView.post { 50 | mFullPageWidth = recyclerView.measuredWidth 51 | mHalfItemWidth = recyclerView.measuredWidth / 6 52 | println("tag=== full: $mFullPageWidth, half: $mHalfItemWidth") 53 | } 54 | 55 | if (mRecyclerView != null) { 56 | destroyCallbacks() 57 | } 58 | mRecyclerView = recyclerView 59 | if (mRecyclerView != null) { 60 | setupCallbacks() 61 | } 62 | } 63 | 64 | @Throws(IllegalStateException::class) 65 | private fun setupCallbacks() { 66 | mRecyclerView?.addOnScrollListener(mScrollListener) 67 | mRecyclerView?.onFlingListener = onFlingListener 68 | } 69 | 70 | private fun destroyCallbacks() { 71 | mRecyclerView?.removeOnScrollListener(mScrollListener) 72 | mRecyclerView?.onFlingListener = null 73 | } 74 | 75 | private fun snapToTargetExistingView(dx: Int, dy: Int) { 76 | when { 77 | dx.absoluteValue >= mHalfItemWidth -> mRecyclerView?.smoothScrollBy( 78 | if (dx > 0) mFullPageWidth - dx else -mFullPageWidth - dx, 0 79 | ) 80 | dy.absoluteValue >= mHalfItemWidth -> mRecyclerView?.smoothScrollBy( 81 | 0, if (dy > 0) mFullPageWidth - dy else -mFullPageWidth - dy 82 | ) 83 | else -> mRecyclerView?.smoothScrollBy(-dx, -dy) 84 | } 85 | } 86 | } -------------------------------------------------------------------------------- /app/src/main/java/com/example/recyclerviewdemo/recyclerview/PagerSnapHelper.kt: -------------------------------------------------------------------------------- 1 | package com.example.recyclerviewdemo.recyclerview 2 | 3 | import android.view.View 4 | import androidx.recyclerview.widget.OrientationHelper 5 | import androidx.recyclerview.widget.RecyclerView 6 | import androidx.recyclerview.widget.SnapHelper 7 | 8 | class PagerSnapHelper(private val itemCount: Int) : SnapHelper() { 9 | private val TAG = "PagerSnapHelper" 10 | 11 | private var mVerticalHelper: OrientationHelper? = null 12 | private var mHorizontalHelper: OrientationHelper? = null 13 | private var mRecyclerViewWidth = 0 14 | private var mRecyclerViewHeight = 0 15 | private var mCurrentScrolledX = 0 16 | private var mCurrentScrolledY = 0 17 | private var mScrolledX = 0 18 | private var mScrolledY = 0 19 | private var mFlung = false 20 | 21 | private val mScrollListener = object : RecyclerView.OnScrollListener() { 22 | private var scrolledByUser = false 23 | 24 | override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) { 25 | if (newState == RecyclerView.SCROLL_STATE_DRAGGING) scrolledByUser = true 26 | if (newState == RecyclerView.SCROLL_STATE_IDLE && scrolledByUser) { 27 | scrolledByUser = false 28 | } 29 | } 30 | 31 | override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) { 32 | mScrolledX += dx 33 | mScrolledY += dy 34 | if (scrolledByUser) { 35 | mCurrentScrolledX += dx 36 | mCurrentScrolledY += dy 37 | } 38 | } 39 | } 40 | 41 | override fun attachToRecyclerView(recyclerView: RecyclerView?) { 42 | super.attachToRecyclerView(recyclerView) 43 | recyclerView?.run { 44 | addOnScrollListener(mScrollListener) 45 | post { 46 | mRecyclerViewWidth = width 47 | mRecyclerViewHeight = height 48 | } 49 | } 50 | } 51 | 52 | override fun calculateDistanceToFinalSnap(layoutManager: RecyclerView.LayoutManager, targetView: View): IntArray? { 53 | val out = IntArray(2) 54 | if (layoutManager.canScrollHorizontally()) { 55 | out[0] = distanceToStart(targetView, getHorizontalHelper(layoutManager)) 56 | out[1] = 0 57 | } else if (layoutManager.canScrollVertically()) { 58 | out[0] = 0 59 | out[1] = distanceToStart(targetView, getVerticalHelper(layoutManager)) 60 | } 61 | return out 62 | } 63 | 64 | private fun distanceToStart(targetView: View, orientationHelper: OrientationHelper): Int { 65 | return orientationHelper.getDecoratedStart(targetView) - orientationHelper.startAfterPadding 66 | } 67 | 68 | override fun findTargetSnapPosition( 69 | layoutManager: RecyclerView.LayoutManager?, 70 | velocityX: Int, 71 | velocityY: Int 72 | ): Int { 73 | val targetPosition = getTargetPosition() 74 | mFlung = targetPosition != RecyclerView.NO_POSITION 75 | println("$TAG findTargetSnapPosition, pos: $targetPosition") 76 | return targetPosition 77 | } 78 | 79 | override fun findSnapView(layoutManager: RecyclerView.LayoutManager?): View? { 80 | if (mFlung) { 81 | resetCurrentScrolled() 82 | mFlung = false 83 | return null 84 | } 85 | if (layoutManager == null) return null 86 | val targetPosition = getTargetPosition() 87 | println("$TAG findSnapView, pos: $targetPosition") 88 | if (targetPosition == RecyclerView.NO_POSITION) return null 89 | layoutManager.startSmoothScroll(createScroller(layoutManager).apply { 90 | this?.targetPosition = targetPosition 91 | }) 92 | return null 93 | } 94 | 95 | private fun getTargetPosition(): Int { 96 | println("$TAG getTargetPosition, mScrolledX: $mScrolledX, mCurrentScrolledX: $mCurrentScrolledX") 97 | val page = when { 98 | mCurrentScrolledX > 0 -> mScrolledX / mRecyclerViewWidth + 1 99 | mCurrentScrolledX < 0 -> mScrolledX / mRecyclerViewWidth 100 | mCurrentScrolledY > 0 -> mScrolledY / mRecyclerViewHeight + 1 101 | mCurrentScrolledY < 0 -> mScrolledY / mRecyclerViewHeight 102 | else -> RecyclerView.NO_POSITION 103 | } 104 | resetCurrentScrolled() 105 | return if (page == RecyclerView.NO_POSITION) RecyclerView.NO_POSITION else page * itemCount 106 | } 107 | 108 | private fun resetCurrentScrolled() { 109 | mCurrentScrolledX = 0 110 | mCurrentScrolledY = 0 111 | } 112 | 113 | private fun getVerticalHelper(layoutManager: RecyclerView.LayoutManager): OrientationHelper { 114 | if (mVerticalHelper == null || mVerticalHelper!!.layoutManager !== layoutManager) { 115 | mVerticalHelper = OrientationHelper.createVerticalHelper(layoutManager) 116 | } 117 | return mVerticalHelper!! 118 | } 119 | 120 | private fun getHorizontalHelper(layoutManager: RecyclerView.LayoutManager): OrientationHelper { 121 | if (mHorizontalHelper == null || mHorizontalHelper!!.layoutManager !== layoutManager) { 122 | mHorizontalHelper = OrientationHelper.createHorizontalHelper(layoutManager) 123 | } 124 | return mHorizontalHelper!! 125 | } 126 | } -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 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 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_launcher_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 7 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 135 | 140 | 145 | 150 | 155 | 160 | 165 | 170 | 171 | --------------------------------------------------------------------------------