├── app ├── .gitignore ├── 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 │ │ │ ├── drawable-xhdpi │ │ │ │ ├── live_money_symbol.png │ │ │ │ └── live_default_user_cover.png │ │ │ ├── drawable-xxhdpi │ │ │ │ └── live_activity_bg.png │ │ │ ├── mipmap-anydpi-v26 │ │ │ │ ├── ic_launcher.xml │ │ │ │ └── ic_launcher_round.xml │ │ │ ├── layout │ │ │ │ ├── activity_main.xml │ │ │ │ └── activity_rank_list_item.xml │ │ │ ├── drawable-v24 │ │ │ │ └── ic_launcher_foreground.xml │ │ │ └── drawable │ │ │ │ └── ic_launcher_background.xml │ │ ├── java │ │ │ └── com │ │ │ │ └── android │ │ │ │ └── zh │ │ │ │ └── liveranklistgradientexample │ │ │ │ ├── util │ │ │ │ ├── ViewUtils.java │ │ │ │ └── RecyclerViewScrollHelper.java │ │ │ │ ├── model │ │ │ │ └── RankListItemModel.kt │ │ │ │ ├── item │ │ │ │ └── RankListItemBinder.kt │ │ │ │ └── MainActivity.kt │ │ └── AndroidManifest.xml │ ├── test │ │ └── java │ │ │ └── com │ │ │ └── android │ │ │ └── zh │ │ │ └── liveranklistgradientexample │ │ │ └── ExampleUnitTest.kt │ └── androidTest │ │ └── java │ │ └── com │ │ └── android │ │ └── zh │ │ └── liveranklistgradientexample │ │ └── ExampleInstrumentedTest.kt ├── proguard-rules.pro └── build.gradle ├── README.md ├── settings.gradle ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── .gitignore ├── gradle.properties ├── gradlew.bat └── gradlew /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # LiveRankListGradientExample 2 | 直播打赏榜，顶部、底部渐变效果。 3 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name='LiveRankListGradientExample' 2 | include ':app' 3 | -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | LiveRankListGradientExample 3 | 4 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/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/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xhdpi/live_money_symbol.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/drawable-xhdpi/live_money_symbol.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/live_activity_bg.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/drawable-xxhdpi/live_activity_bg.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/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/hezihaog/LiveRankListGradientExample/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/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xhdpi/live_default_user_cover.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hezihaog/LiveRankListGradientExample/HEAD/app/src/main/res/drawable-xhdpi/live_default_user_cover.png -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #6200EE 4 | #3700B3 5 | #03DAC5 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 | .cxx 15 | .idea -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Wed Apr 01 15:00:11 CST 2020 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-5.6.4-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 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /app/src/test/java/com/android/zh/liveranklistgradientexample/ExampleUnitTest.kt: -------------------------------------------------------------------------------- 1 | package com.android.zh.liveranklistgradientexample 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 | -------------------------------------------------------------------------------- /app/src/main/java/com/android/zh/liveranklistgradientexample/util/ViewUtils.java: -------------------------------------------------------------------------------- 1 | package com.android.zh.liveranklistgradientexample.util; 2 | 3 | import android.content.Context; 4 | 5 | public class ViewUtils { 6 | /** 7 | * dip换算成像素数量 8 | */ 9 | public static int dipToPx(Context context, float dip) { 10 | float density = context.getApplicationContext().getResources().getDisplayMetrics().density; 11 | return roundUp(dip * context.getResources().getDisplayMetrics().density); 12 | } 13 | 14 | private static int roundUp(float f) { 15 | return (int) (0.5f + f); 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /app/src/main/java/com/android/zh/liveranklistgradientexample/model/RankListItemModel.kt: -------------------------------------------------------------------------------- 1 | package com.android.zh.liveranklistgradientexample.model 2 | 3 | /** 4 | * @author : lizhi - hezihao 5 | * e-mail : hezihao@lizhi.fm 6 | * time : 2020/04/01 7 | * desc :打赏榜列表模型 8 | */ 9 | data class RankListItemModel( 10 | /** 11 | * 排名号码 12 | */ 13 | val rankNum: Int, 14 | /** 15 | * 用户昵称 16 | */ 17 | val nickname: String, 18 | /** 19 | * 用户头像 20 | */ 21 | val avatarUrl: String, 22 | /** 23 | * 打赏金额 24 | */ 25 | val money: String, 26 | /** 27 | * 文字颜色资源Id 28 | */ 29 | val textColorResId: Int 30 | ) -------------------------------------------------------------------------------- /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/androidTest/java/com/android/zh/liveranklistgradientexample/ExampleInstrumentedTest.kt: -------------------------------------------------------------------------------- 1 | package com.android.zh.liveranklistgradientexample 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.android.zh.liveranklistgradientexample", appContext.packageName) 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 10 | 11 | 22 | -------------------------------------------------------------------------------- /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 | apply plugin: 'kotlin-android' 3 | apply plugin: 'kotlin-android-extensions' 4 | 5 | android { 6 | compileSdkVersion 29 7 | buildToolsVersion "29.0.2" 8 | 9 | defaultConfig { 10 | applicationId "com.android.zh.liveranklistgradientexample" 11 | minSdkVersion 16 12 | targetSdkVersion 29 13 | versionCode 1 14 | versionName "1.0" 15 | 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 | 28 | dependencies { 29 | implementation fileTree(dir: 'libs', include: ['*.jar']) 30 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 31 | implementation 'androidx.appcompat:appcompat:1.1.0' 32 | implementation 'androidx.core:core-ktx:1.2.0' 33 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3' 34 | implementation 'me.drakeet.multitype:multitype:3.5.0' 35 | implementation 'androidx.recyclerview:recyclerview:1.1.0' 36 | testImplementation 'junit:junit:4.12' 37 | androidTestImplementation 'androidx.test.ext:junit:1.1.1' 38 | androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' 39 | } -------------------------------------------------------------------------------- /app/src/main/res/drawable-v24/ic_launcher_foreground.xml: -------------------------------------------------------------------------------- 1 | 7 | 8 | 9 | 15 | 18 | 21 | 22 | 23 | 24 | 30 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_rank_list_item.xml: -------------------------------------------------------------------------------- 1 | 2 | 10 | 11 | 20 | 21 | 26 | 27 | 37 | 38 | 42 | 43 | 52 | -------------------------------------------------------------------------------- /app/src/main/java/com/android/zh/liveranklistgradientexample/item/RankListItemBinder.kt: -------------------------------------------------------------------------------- 1 | package com.android.zh.liveranklistgradientexample.item 2 | 3 | import android.view.LayoutInflater 4 | import android.view.View 5 | import android.view.ViewGroup 6 | import android.widget.ImageView 7 | import android.widget.TextView 8 | import androidx.recyclerview.widget.RecyclerView 9 | import com.android.zh.liveranklistgradientexample.R 10 | import com.android.zh.liveranklistgradientexample.model.RankListItemModel 11 | import me.drakeet.multitype.ItemViewBinder 12 | 13 | /** 14 | * @author : lizhi - hezihao 15 | * e-mail : hezihao@lizhi.fm 16 | * time : 2020/04/01 17 | * desc : 18 | */ 19 | class RankListItemBinder : ItemViewBinder() { 20 | override fun onCreateViewHolder(inflater: LayoutInflater, parent: ViewGroup): ViewHolder { 21 | return ViewHolder(inflater.inflate(R.layout.activity_rank_list_item, parent, false)) 22 | } 23 | 24 | override fun onBindViewHolder(holder: ViewHolder, item: RankListItemModel) { 25 | val context = holder.itemView.context 26 | item.run { 27 | val textColor = context.resources.getColor(textColorResId) 28 | holder.vRankNum.run { 29 | setTextColor(textColor) 30 | text = rankNum.toString() 31 | } 32 | holder.vNickname.run { 33 | setTextColor(textColor) 34 | text = nickname 35 | } 36 | holder.vAvatar.setImageResource(R.drawable.live_default_user_cover) 37 | holder.vMoney.run { 38 | setTextColor(textColor) 39 | text = money 40 | } 41 | } 42 | } 43 | 44 | inner class ViewHolder(view: View) : RecyclerView.ViewHolder(view) { 45 | val vRankNum: TextView = view.findViewById(R.id.rank_num) 46 | val vNickname: TextView = view.findViewById(R.id.nickname) 47 | val vAvatar: ImageView = view.findViewById(R.id.avatar) 48 | val vMoney: TextView = view.findViewById(R.id.money) 49 | } 50 | } -------------------------------------------------------------------------------- /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/android/zh/liveranklistgradientexample/util/RecyclerViewScrollHelper.java: -------------------------------------------------------------------------------- 1 | package com.android.zh.liveranklistgradientexample.util; 2 | 3 | import androidx.recyclerview.widget.RecyclerView; 4 | 5 | /** 6 | * @author : lizhi - hezihao 7 | * e-mail : hezihao@lizhi.fm 8 | * time : 2020/04/02 9 | * desc :滚动帮助类 10 | */ 11 | public class RecyclerViewScrollHelper { 12 | /** 13 | * 第一次进入界面时也会回调滚动，所以当手动滚动再监听 14 | */ 15 | private boolean isNotFirst = false; 16 | /** 17 | * 列表控件 18 | */ 19 | private RecyclerView scrollingView; 20 | /** 21 | * 回调 22 | */ 23 | private Callback callback; 24 | 25 | public void attachRecyclerView(RecyclerView scrollingView, Callback callback) { 26 | this.scrollingView = scrollingView; 27 | this.callback = callback; 28 | setup(); 29 | } 30 | 31 | private void setup() { 32 | scrollingView.addOnScrollListener(new RecyclerView.OnScrollListener() { 33 | @Override 34 | public void onScrollStateChanged(RecyclerView recyclerView, int newState) { 35 | super.onScrollStateChanged(recyclerView, newState); 36 | isNotFirst = true; 37 | if (callback != null) { 38 | //如果滚动到最后一行，RecyclerView.canScrollVertically(1)的值表示是否能向上滚动，false表示已经滚动到底部 39 | if (newState == RecyclerView.SCROLL_STATE_IDLE && 40 | !recyclerView.canScrollVertically(1)) { 41 | callback.onScrolledToBottom(); 42 | } 43 | } 44 | } 45 | 46 | @Override 47 | public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 48 | super.onScrolled(recyclerView, dx, dy); 49 | if (callback != null && isNotFirst) { 50 | //RecyclerView.canScrollVertically(-1)的值表示是否能向下滚动，false表示已经滚动到顶部 51 | if (!recyclerView.canScrollVertically(-1)) { 52 | callback.onScrolledToTop(); 53 | } 54 | //下滑 55 | if (dy < 0) { 56 | callback.onScrolledToDown(); 57 | } 58 | //上滑 59 | if (dy > 0) { 60 | callback.onScrolledToUp(); 61 | } 62 | } 63 | } 64 | }); 65 | } 66 | 67 | public interface Callback { 68 | /** 69 | * 向下滚动 70 | */ 71 | void onScrolledToDown(); 72 | 73 | /** 74 | * 向上滚动 75 | */ 76 | void onScrolledToUp(); 77 | 78 | /** 79 | * 滚动到了顶部 80 | */ 81 | void onScrolledToTop(); 82 | 83 | /** 84 | * 滚动到了底部 85 | */ 86 | void onScrolledToBottom(); 87 | } 88 | 89 | public static class CallbackAdapter implements Callback { 90 | @Override 91 | public void onScrolledToDown() { 92 | } 93 | 94 | @Override 95 | public void onScrolledToUp() { 96 | } 97 | 98 | @Override 99 | public void onScrolledToTop() { 100 | } 101 | 102 | @Override 103 | public void onScrolledToBottom() { 104 | } 105 | } 106 | 107 | /** 108 | * 马上滚动到顶部 109 | */ 110 | public void moveToTop() { 111 | if (scrollingView != null) { 112 | scrollingView.scrollToPosition(0); 113 | } 114 | } 115 | 116 | /** 117 | * 缓慢滚动到顶部 118 | */ 119 | public void smoothMoveToTop() { 120 | if (scrollingView != null) { 121 | scrollingView.smoothScrollToPosition(0); 122 | } 123 | } 124 | } -------------------------------------------------------------------------------- /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 | -------------------------------------------------------------------------------- /app/src/main/java/com/android/zh/liveranklistgradientexample/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package com.android.zh.liveranklistgradientexample 2 | 3 | import android.graphics.* 4 | import android.os.Build 5 | import android.os.Bundle 6 | import androidx.appcompat.app.AppCompatActivity 7 | import androidx.recyclerview.widget.LinearLayoutManager 8 | import androidx.recyclerview.widget.RecyclerView 9 | import com.android.zh.liveranklistgradientexample.item.RankListItemBinder 10 | import com.android.zh.liveranklistgradientexample.model.RankListItemModel 11 | import com.android.zh.liveranklistgradientexample.util.RecyclerViewScrollHelper 12 | import com.android.zh.liveranklistgradientexample.util.ViewUtils 13 | import me.drakeet.multitype.Items 14 | import me.drakeet.multitype.MultiTypeAdapter 15 | 16 | 17 | class MainActivity : AppCompatActivity() { 18 | private lateinit var vRankList: RecyclerView 19 | 20 | private val mListItems = Items() 21 | private val mListAdapter = MultiTypeAdapter(mListItems).apply { 22 | register(RankListItemModel::class.java, RankListItemBinder()) 23 | } 24 | 25 | override fun onCreate(savedInstanceState: Bundle?) { 26 | super.onCreate(savedInstanceState) 27 | setContentView(R.layout.activity_main) 28 | findView() 29 | bindView() 30 | setData() 31 | } 32 | 33 | private fun findView() { 34 | vRankList = findViewById(R.id.rank_list) 35 | } 36 | 37 | private fun bindView() { 38 | supportActionBar?.title = "打赏榜" 39 | vRankList.run { 40 | adapter = mListAdapter 41 | layoutManager = LinearLayoutManager(this@MainActivity) 42 | setupRankListAlphaStyle() 43 | } 44 | } 45 | 46 | private fun setData() { 47 | val textColorResId = android.R.color.white 48 | for (index in 1..15) { 49 | mListItems.add( 50 | RankListItemModel( 51 | index, 52 | generateNickName(index), 53 | "", 54 | (100 + index).toString(), 55 | textColorResId 56 | ) 57 | ) 58 | } 59 | mListAdapter.notifyDataSetChanged() 60 | } 61 | 62 | /** 63 | * 生成昵称 64 | */ 65 | private fun generateNickName(index: Int): String { 66 | val nicknames = listOf( 67 | "迪丽热巴", "黄晓明", "杨幂", 68 | "彭于晏", "柳岩", "李易峰", "陈伟霆", "刘诗诗", "张艺兴", "成龙", 69 | "蔡徐坤", "赵丽颖", "王一博", "阚清子", "刘亦菲", "郑爽", "杨紫", 70 | "关晓彤", "唐嫣", "胡歌", "宋茜", "周杰伦", "吴亦凡", "周冬雨", "华晨宇" 71 | ) 72 | val position = index % nicknames.size 73 | return nicknames[position] 74 | } 75 | 76 | /** 77 | * 设置排行榜列表透明度风格 78 | */ 79 | private fun setupRankListAlphaStyle() { 80 | val context = this 81 | val paint = Paint() 82 | val shadowHeight = ViewUtils.dipToPx(context, 80f).toFloat() 83 | //顶部渐变 84 | val topShadowStrategy = TopShadowStrategy(shadowHeight, paint) 85 | //底部渐变 86 | val bottomShadowStrategy = BottomShadowStrategy(shadowHeight, paint) 87 | 88 | //混合模式 89 | val xfermode: Xfermode = PorterDuffXfermode(PorterDuff.Mode.DST_IN) 90 | var layerId = 0 91 | vRankList.addItemDecoration(object : RecyclerView.ItemDecoration() { 92 | /** 93 | * 可以实现类似绘制背景的效果，内容在上面 94 | */ 95 | override fun onDraw(canvas: Canvas, parent: RecyclerView, state: RecyclerView.State) { 96 | super.onDraw(canvas, parent, state) 97 | layerId = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 98 | canvas.saveLayer( 99 | 0.0f, 100 | 0.0f, 101 | parent.width.toFloat(), 102 | parent.height.toFloat(), 103 | paint 104 | ) 105 | } else { 106 | canvas.saveLayer( 107 | 0.0f, 108 | 0.0f, 109 | parent.width.toFloat(), 110 | parent.height.toFloat(), 111 | paint, 112 | Canvas.ALL_SAVE_FLAG 113 | ) 114 | } 115 | } 116 | 117 | /** 118 | * 可以绘制在内容的上面，覆盖内容 119 | */ 120 | override fun onDrawOver( 121 | canvas: Canvas, 122 | parent: RecyclerView, 123 | state: RecyclerView.State 124 | ) { 125 | super.onDrawOver(canvas, parent, state) 126 | paint.xfermode = xfermode 127 | 128 | //画顶部渐变 129 | paint.shader = topShadowStrategy.getShader(parent) 130 | topShadowStrategy.onDrawOver(canvas, parent, state) 131 | 132 | //画底部渐变 133 | paint.shader = bottomShadowStrategy.getShader(parent) 134 | bottomShadowStrategy.onDrawOver(canvas, parent, state) 135 | 136 | paint.xfermode = null 137 | canvas.restoreToCount(layerId) 138 | } 139 | }) 140 | } 141 | 142 | /** 143 | * 渐变策略 144 | */ 145 | private abstract class ShadowStrategy( 146 | val shadowHeight: Float, 147 | val paint: Paint 148 | ) { 149 | /** 150 | * 绘制 151 | */ 152 | abstract fun onDrawOver(canvas: Canvas, parent: RecyclerView, state: RecyclerView.State) 153 | 154 | /** 155 | * 获取着色器 156 | */ 157 | abstract fun getShader(parent: RecyclerView): Shader 158 | } 159 | 160 | /** 161 | * 顶部渐变 162 | */ 163 | private inner class TopShadowStrategy(shadowHeight: Float, paint: Paint) : 164 | ShadowStrategy(shadowHeight, paint) { 165 | 166 | private lateinit var mScrollHelper: RecyclerViewScrollHelper 167 | /** 168 | * 是否可以绘制渐变 169 | */ 170 | private var isCanDrawShadow: Boolean = false 171 | 172 | override fun onDrawOver(canvas: Canvas, parent: RecyclerView, state: RecyclerView.State) { 173 | if (isCanDrawShadow) { 174 | val left = 0f 175 | val top = 0f 176 | val right = parent.width.toFloat() 177 | val bottom = shadowHeight 178 | val topShadowRect = RectF(left, top, right, bottom) 179 | canvas.drawRect(topShadowRect, paint) 180 | } 181 | } 182 | 183 | override fun getShader(parent: RecyclerView): Shader { 184 | if (!this::mScrollHelper.isInitialized) { 185 | mScrollHelper = RecyclerViewScrollHelper() 186 | mScrollHelper.attachRecyclerView( 187 | parent, 188 | object : RecyclerViewScrollHelper.CallbackAdapter() { 189 | override fun onScrolledToTop() { 190 | //到了顶部就不能渲染 191 | isCanDrawShadow = false 192 | } 193 | 194 | override fun onScrolledToUp() { 195 | super.onScrolledToUp() 196 | //向上滚动，列表向下移动，则需要渲染 197 | isCanDrawShadow = true 198 | } 199 | }) 200 | } 201 | return run { 202 | //渐变起始x，y坐标 203 | val x0 = 0f 204 | val y0 = 0f 205 | //渐变结束x，y坐标 206 | val x1 = 0f 207 | val y1 = shadowHeight 208 | //渐变颜色的开始、结束颜色 209 | val startColor = Color.TRANSPARENT 210 | val endColor = Color.BLACK 211 | val colors = intArrayOf(startColor, endColor) 212 | //渐变位置数组 213 | val positions = null 214 | 215 | //指定控件区域大于指定的渐变区域时，空白区域的颜色填充方法 216 | //CLAMP：边缘拉伸，为被shader覆盖区域，使用shader边界颜色进行填充 217 | //REPEAT：在水平和垂直两个方向上重复，相邻图像没有间隙 218 | //MIRROR：以镜像的方式在水平和垂直两个方向上重复，相邻图像有间隙 219 | val tile = Shader.TileMode.CLAMP 220 | LinearGradient( 221 | x0, y0, x1, y1, 222 | colors, positions, tile 223 | ) 224 | } 225 | } 226 | } 227 | 228 | /** 229 | * 底部渐变 230 | */ 231 | private inner class BottomShadowStrategy(shadowHeight: Float, paint: Paint) : 232 | ShadowStrategy(shadowHeight, paint) { 233 | 234 | /** 235 | * 是否可以绘制渐变 236 | */ 237 | private var isCanDrawShadow: Boolean = true 238 | 239 | override fun onDrawOver(canvas: Canvas, parent: RecyclerView, state: RecyclerView.State) { 240 | //底部渐变，必须指定数量的条目才可以绘制 241 | isCanDrawShadow = (parent.adapter?.itemCount ?: 0) > 8 242 | if (isCanDrawShadow) { 243 | val left = 0f 244 | val top = parent.height - shadowHeight 245 | val right = parent.width.toFloat() 246 | val bottom = parent.height.toFloat() 247 | val topShadowRect = RectF(left, top, right, bottom) 248 | canvas.drawRect(topShadowRect, paint) 249 | } 250 | } 251 | 252 | override fun getShader(parent: RecyclerView): Shader { 253 | return run { 254 | //渐变起始x，y坐标 255 | val x0 = 0f 256 | val y0 = parent.height - shadowHeight 257 | //渐变结束x，y坐标 258 | val x1 = 0f 259 | val y1 = parent.height.toFloat() 260 | 261 | //渐变颜色的开始、结束颜色 262 | val startColor = Color.BLACK 263 | val endColor = Color.TRANSPARENT 264 | val colors = intArrayOf(startColor, endColor) 265 | //渐变位置数组 266 | val positions = null 267 | 268 | //指定控件区域大于指定的渐变区域时，空白区域的颜色填充方法 269 | //CLAMP：边缘拉伸，为被shader覆盖区域，使用shader边界颜色进行填充 270 | //REPEAT：在水平和垂直两个方向上重复，相邻图像没有间隙 271 | //MIRROR：以镜像的方式在水平和垂直两个方向上重复，相邻图像有间隙 272 | val tile = Shader.TileMode.CLAMP 273 | LinearGradient( 274 | x0, y0, x1, y1, 275 | colors, positions, tile 276 | ) 277 | } 278 | } 279 | } 280 | } --------------------------------------------------------------------------------