├── app ├── .gitignore ├── src │ ├── main │ │ ├── res │ │ │ ├── raw │ │ │ │ └── mp3 │ │ │ ├── values │ │ │ │ ├── strings.xml │ │ │ │ ├── styles.xml │ │ │ │ └── colors.xml │ │ │ ├── drawable-hdpi │ │ │ │ ├── ic_pause.png │ │ │ │ └── ic_play_arrow.png │ │ │ ├── drawable-mdpi │ │ │ │ ├── ic_pause.png │ │ │ │ └── ic_play_arrow.png │ │ │ ├── drawable-xhdpi │ │ │ │ ├── ic_pause.png │ │ │ │ └── ic_play_arrow.png │ │ │ ├── drawable-xxhdpi │ │ │ │ ├── ic_pause.png │ │ │ │ └── ic_play_arrow.png │ │ │ ├── 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 │ │ │ └── layout │ │ │ │ ├── activity_main.xml │ │ │ │ └── cell.xml │ │ ├── AndroidManifest.xml │ │ └── java │ │ │ └── demo │ │ │ └── sk │ │ │ └── demolistplayer │ │ │ └── MainActivity.java │ ├── test │ │ └── java │ │ │ └── demo │ │ │ └── sk │ │ │ └── demolistplayer │ │ │ └── ExampleUnitTest.java │ └── androidTest │ │ └── java │ │ └── demo │ │ └── sk │ │ └── demolistplayer │ │ └── ExampleInstrumentedTest.java ├── proguard-rules.pro └── build.gradle ├── settings.gradle ├── .idea ├── copyright │ └── profiles_settings.xml ├── markdown-navigator │ └── profiles_settings.xml ├── vcs.xml ├── modules.xml ├── runConfigurations.xml ├── gradle.xml ├── compiler.xml └── misc.xml ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── .gitignore ├── gradle.properties ├── README.md ├── gradlew.bat └── gradlew /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app' 2 | -------------------------------------------------------------------------------- /app/src/main/res/raw/mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/raw/mp3 -------------------------------------------------------------------------------- /.idea/copyright/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | Demo List Player 3 | 4 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /app/src/main/res/drawable-hdpi/ic_pause.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-hdpi/ic_pause.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-mdpi/ic_pause.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-mdpi/ic_pause.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xhdpi/ic_pause.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-xhdpi/ic_pause.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/ic_pause.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-xxhdpi/ic_pause.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /.idea/markdown-navigator/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-hdpi/ic_play_arrow.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-hdpi/ic_play_arrow.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-mdpi/ic_play_arrow.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-mdpi/ic_play_arrow.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xhdpi/ic_play_arrow.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-xhdpi/ic_play_arrow.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/ic_play_arrow.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/drawable-xxhdpi/ic_play_arrow.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/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/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kujeensiti/DemoListPlayer/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/kujeensiti/DemoListPlayer/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/kujeensiti/DemoListPlayer/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea/workspace.xml 5 | /.idea/libraries 6 | .DS_Store 7 | /build 8 | /captures 9 | .externalNativeBuild 10 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #3F51B5 4 | #303F9F 5 | #FF4081 6 | 7 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Tue Sep 12 14:50:04 IST 2017 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-3.3-all.zip 7 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /.idea/modules.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /app/src/test/java/demo/sk/demolistplayer/ExampleUnitTest.java: -------------------------------------------------------------------------------- 1 | package demo.sk.demolistplayer; 2 | 3 | import org.junit.Test; 4 | 5 | import static org.junit.Assert.*; 6 | 7 | /** 8 | * Example local unit test, which will execute on the development machine (host). 9 | * 10 | * @see Testing documentation 11 | */ 12 | public class ExampleUnitTest { 13 | @Test 14 | public void addition_isCorrect() throws Exception { 15 | assertEquals(4, 2 + 2); 16 | } 17 | } -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/gradle.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 17 | 18 | -------------------------------------------------------------------------------- /.idea/compiler.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | 3 | # IDE (e.g. Android Studio) users: 4 | # Gradle settings configured through the IDE *will override* 5 | # any settings specified in this file. 6 | 7 | # For more details on how to configure your build environment visit 8 | # http://www.gradle.org/docs/current/userguide/build_environment.html 9 | 10 | # Specifies the JVM arguments used for the daemon process. 11 | # The setting is particularly useful for tweaking memory settings. 12 | org.gradle.jvmargs=-Xmx1536m 13 | 14 | # When configured, Gradle will run in incubating parallel mode. 15 | # This option should only be used with decoupled projects. More details, visit 16 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 17 | # org.gradle.parallel=true 18 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /app/src/androidTest/java/demo/sk/demolistplayer/ExampleInstrumentedTest.java: -------------------------------------------------------------------------------- 1 | package demo.sk.demolistplayer; 2 | 3 | import android.content.Context; 4 | import android.support.test.InstrumentationRegistry; 5 | import android.support.test.runner.AndroidJUnit4; 6 | 7 | import org.junit.Test; 8 | import org.junit.runner.RunWith; 9 | 10 | import static org.junit.Assert.*; 11 | 12 | /** 13 | * Instrumentation test, which will execute on an Android device. 14 | * 15 | * @see Testing documentation 16 | */ 17 | @RunWith(AndroidJUnit4.class) 18 | public class ExampleInstrumentedTest { 19 | @Test 20 | public void useAppContext() throws Exception { 21 | // Context of the app under test. 22 | Context appContext = InstrumentationRegistry.getTargetContext(); 23 | 24 | assertEquals("demo.sk.demolistplayer", appContext.getPackageName()); 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in /Library/Android/sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | 19 | # Uncomment this to preserve the line number information for 20 | # debugging stack traces. 21 | #-keepattributes SourceFile,LineNumberTable 22 | 23 | # If you keep the line number information, uncomment this to 24 | # hide the original source file name. 25 | #-renamesourcefileattribute SourceFile 26 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 25 5 | buildToolsVersion "26.0.0" 6 | defaultConfig { 7 | applicationId "demo.sk.demolistplayer" 8 | minSdkVersion 19 9 | targetSdkVersion 25 10 | versionCode 1 11 | versionName "1.0" 12 | testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 13 | } 14 | buildTypes { 15 | release { 16 | minifyEnabled false 17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 18 | } 19 | } 20 | } 21 | 22 | dependencies { 23 | compile fileTree(dir: 'libs', include: ['*.jar']) 24 | androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 25 | exclude group: 'com.android.support', module: 'support-annotations' 26 | }) 27 | compile "com.android.support:appcompat-v7:25.3.1" 28 | compile "com.android.support:support-v4:25.3.1" 29 | compile 'com.android.support:recyclerview-v7:25.3.1' 30 | testCompile 'junit:junit:4.12' 31 | } 32 | -------------------------------------------------------------------------------- /app/src/main/res/layout/cell.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 11 | 12 | 18 | 19 | 28 | 29 | 35 | 36 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | **Demo List Player** 2 | 3 | **Level:** Beginner 4 | 5 | **Objectives:** 6 | 7 | This project demonstrates: 8 | 9 | 1. Use of `RecyclerView` to show list of songs. Each list item (cell) displays play/pause button and a seek bar to control the playback of the audio. 10 | 2. Controlling playback of a song with a play/pause button and updating button state when playback is toggled and completed 11 | 3. Displaying song playback progress and controlling it with a seek bar 12 | 4. Stopping playback when activity moves out of screen 13 | 14 | **Description** 15 | 16 | `AudioItem` is a simple POJO which has properties describing audio items, such as title, artist, album, genre, url etc. For this demo application, only one property is considered, that is resource id of audio from `raw` directory. A list of 256 `AudioItem`s is constructed to display in the form of vertically scrollable list. These all items are constructed with the same resource id, and as a result only one audio is played for all the cells. 17 | 18 | `RecyclerView` optimises space by constructing (roughly) only as much cell children (or `ViewHolder`s) as displayed on the screen. When one scrolls the list upward, unused `ViewHolder` of the top-most cell, which is moving out of the screen, will be reused to display the new cell coming from the bottom. UI elements's states are updated to proper audio item `position` in `onBindViewHolder` method. 19 | 20 | `MediaPlayer` is owned and managed by the `AudioItemAdapter`. It is made sure through `uiUpdateHandler` that the seek bar is updated only while media player is in playing state. `AudioItemAdapter.stopPlayer` is used to stop media player when acticity is paused. -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 19 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 46 | -------------------------------------------------------------------------------- /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 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 12 | set DEFAULT_JVM_OPTS= 13 | 14 | set DIRNAME=%~dp0 15 | if "%DIRNAME%" == "" set DIRNAME=. 16 | set APP_BASE_NAME=%~n0 17 | set APP_HOME=%DIRNAME% 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 Windowz variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | if "%@eval[2+2]" == "4" goto 4NT_args 53 | 54 | :win9xME_args 55 | @rem Slurp the command line arguments. 56 | set CMD_LINE_ARGS= 57 | set _SKIP=2 58 | 59 | :win9xME_args_slurp 60 | if "x%~1" == "x" goto execute 61 | 62 | set CMD_LINE_ARGS=%* 63 | goto execute 64 | 65 | :4NT_args 66 | @rem Get arguments from the 4NT Shell from JP Software 67 | set CMD_LINE_ARGS=%$ 68 | 69 | :execute 70 | @rem Setup the command line 71 | 72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 73 | 74 | @rem Execute Gradle 75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 76 | 77 | :end 78 | @rem End local scope for the variables with windows NT shell 79 | if "%ERRORLEVEL%"=="0" goto mainEnd 80 | 81 | :fail 82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 83 | rem the _cmd.exe /c_ return code! 84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 85 | exit /b 1 86 | 87 | :mainEnd 88 | if "%OS%"=="Windows_NT" endlocal 89 | 90 | :omega 91 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 10 | DEFAULT_JVM_OPTS="" 11 | 12 | APP_NAME="Gradle" 13 | APP_BASE_NAME=`basename "$0"` 14 | 15 | # Use the maximum available, or set MAX_FD != -1 to use that value. 16 | MAX_FD="maximum" 17 | 18 | warn ( ) { 19 | echo "$*" 20 | } 21 | 22 | die ( ) { 23 | echo 24 | echo "$*" 25 | echo 26 | exit 1 27 | } 28 | 29 | # OS specific support (must be 'true' or 'false'). 30 | cygwin=false 31 | msys=false 32 | darwin=false 33 | case "`uname`" in 34 | CYGWIN* ) 35 | cygwin=true 36 | ;; 37 | Darwin* ) 38 | darwin=true 39 | ;; 40 | MINGW* ) 41 | msys=true 42 | ;; 43 | esac 44 | 45 | # Attempt to set APP_HOME 46 | # Resolve links: $0 may be a link 47 | PRG="$0" 48 | # Need this for relative symlinks. 49 | while [ -h "$PRG" ] ; do 50 | ls=`ls -ld "$PRG"` 51 | link=`expr "$ls" : '.*-> \(.*\)$'` 52 | if expr "$link" : '/.*' > /dev/null; then 53 | PRG="$link" 54 | else 55 | PRG=`dirname "$PRG"`"/$link" 56 | fi 57 | done 58 | SAVED="`pwd`" 59 | cd "`dirname \"$PRG\"`/" >/dev/null 60 | APP_HOME="`pwd -P`" 61 | cd "$SAVED" >/dev/null 62 | 63 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 64 | 65 | # Determine the Java command to use to start the JVM. 66 | if [ -n "$JAVA_HOME" ] ; then 67 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 68 | # IBM's JDK on AIX uses strange locations for the executables 69 | JAVACMD="$JAVA_HOME/jre/sh/java" 70 | else 71 | JAVACMD="$JAVA_HOME/bin/java" 72 | fi 73 | if [ ! -x "$JAVACMD" ] ; then 74 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 75 | 76 | Please set the JAVA_HOME variable in your environment to match the 77 | location of your Java installation." 78 | fi 79 | else 80 | JAVACMD="java" 81 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 82 | 83 | Please set the JAVA_HOME variable in your environment to match the 84 | location of your Java installation." 85 | fi 86 | 87 | # Increase the maximum file descriptors if we can. 88 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then 89 | MAX_FD_LIMIT=`ulimit -H -n` 90 | if [ $? -eq 0 ] ; then 91 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 92 | MAX_FD="$MAX_FD_LIMIT" 93 | fi 94 | ulimit -n $MAX_FD 95 | if [ $? -ne 0 ] ; then 96 | warn "Could not set maximum file descriptor limit: $MAX_FD" 97 | fi 98 | else 99 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 100 | fi 101 | fi 102 | 103 | # For Darwin, add options to specify how the application appears in the dock 104 | if $darwin; then 105 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 106 | fi 107 | 108 | # For Cygwin, switch paths to Windows format before running java 109 | if $cygwin ; then 110 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 111 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 112 | JAVACMD=`cygpath --unix "$JAVACMD"` 113 | 114 | # We build the pattern for arguments to be converted via cygpath 115 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 116 | SEP="" 117 | for dir in $ROOTDIRSRAW ; do 118 | ROOTDIRS="$ROOTDIRS$SEP$dir" 119 | SEP="|" 120 | done 121 | OURCYGPATTERN="(^($ROOTDIRS))" 122 | # Add a user-defined pattern to the cygpath arguments 123 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 124 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 125 | fi 126 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 127 | i=0 128 | for arg in "$@" ; do 129 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 130 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 131 | 132 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 133 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 134 | else 135 | eval `echo args$i`="\"$arg\"" 136 | fi 137 | i=$((i+1)) 138 | done 139 | case $i in 140 | (0) set -- ;; 141 | (1) set -- "$args0" ;; 142 | (2) set -- "$args0" "$args1" ;; 143 | (3) set -- "$args0" "$args1" "$args2" ;; 144 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 145 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 146 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 147 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 148 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 149 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 150 | esac 151 | fi 152 | 153 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules 154 | function splitJvmOpts() { 155 | JVM_OPTS=("$@") 156 | } 157 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS 158 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" 159 | 160 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" 161 | -------------------------------------------------------------------------------- /app/src/main/java/demo/sk/demolistplayer/MainActivity.java: -------------------------------------------------------------------------------- 1 | package demo.sk.demolistplayer; 2 | 3 | import android.app.Activity; 4 | import android.media.MediaPlayer; 5 | import android.os.Bundle; 6 | import android.os.Handler; 7 | import android.os.Message; 8 | import android.support.annotation.Nullable; 9 | import android.support.v7.widget.LinearLayoutManager; 10 | import android.support.v7.widget.RecyclerView; 11 | import android.view.LayoutInflater; 12 | import android.view.View; 13 | import android.view.ViewGroup; 14 | import android.widget.ImageView; 15 | import android.widget.SeekBar; 16 | import android.widget.TextView; 17 | 18 | import java.util.ArrayList; 19 | import java.util.List; 20 | import java.util.Locale; 21 | 22 | public class MainActivity extends Activity { 23 | 24 | private AudioItemAdapter audioItemAdapter; 25 | 26 | // POJO to hold data about audio items 27 | private static class AudioItem { 28 | 29 | // raw resource id of audio cell 30 | final int audioResId; 31 | 32 | private AudioItem(int audioResId) { 33 | this.audioResId = audioResId; 34 | } 35 | } 36 | 37 | @Override 38 | protected void onCreate(@Nullable Bundle savedInstanceState) { 39 | super.onCreate(savedInstanceState); 40 | setContentView(R.layout.activity_main); 41 | 42 | RecyclerView rv = (RecyclerView) findViewById(R.id.rv); 43 | 44 | // arrange cells in vertical column 45 | rv.setLayoutManager(new LinearLayoutManager(this)); 46 | 47 | // add 256 stub audio items 48 | ArrayList audioItems = new ArrayList<>(); 49 | for (int i = 0; i < 256; i++) { 50 | audioItems.add(new AudioItem(R.raw.mp3)); 51 | } 52 | audioItemAdapter = new AudioItemAdapter(audioItems); 53 | rv.setAdapter(audioItemAdapter); 54 | } 55 | 56 | @Override 57 | protected void onPause() { 58 | super.onPause(); 59 | audioItemAdapter.stopPlayer(); 60 | } 61 | 62 | private class AudioItemAdapter extends RecyclerView.Adapter implements Handler.Callback { 63 | 64 | private static final int MSG_UPDATE_SEEK_BAR = 1845; 65 | 66 | private MediaPlayer mediaPlayer; 67 | 68 | private Handler uiUpdateHandler; 69 | 70 | private List audioItems; 71 | private int playingPosition; 72 | private AudioItemsViewHolder playingHolder; 73 | 74 | AudioItemAdapter(List audioItems) { 75 | this.audioItems = audioItems; 76 | this.playingPosition = -1; 77 | uiUpdateHandler = new Handler(this); 78 | } 79 | 80 | @Override 81 | public AudioItemsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 82 | return new AudioItemsViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.cell, parent, false)); 83 | } 84 | 85 | @Override 86 | public void onBindViewHolder(AudioItemsViewHolder holder, int position) { 87 | if (position == playingPosition) { 88 | playingHolder = holder; 89 | // this view holder corresponds to the currently playing audio cell 90 | // update its view to show playing progress 91 | updatePlayingView(); 92 | } else { 93 | // and this one corresponds to non playing 94 | updateNonPlayingView(holder); 95 | } 96 | holder.tvIndex.setText(String.format(Locale.US, "%d", position)); 97 | } 98 | 99 | @Override 100 | public int getItemCount() { 101 | return audioItems.size(); 102 | } 103 | 104 | @Override 105 | public void onViewRecycled(AudioItemsViewHolder holder) { 106 | super.onViewRecycled(holder); 107 | if (playingPosition == holder.getAdapterPosition()) { 108 | // view holder displaying playing audio cell is being recycled 109 | // change its state to non-playing 110 | updateNonPlayingView(playingHolder); 111 | playingHolder = null; 112 | } 113 | } 114 | 115 | /** 116 | * Changes the view to non playing state 117 | * - icon is changed to play arrow 118 | * - seek bar disabled 119 | * - remove seek bar updater, if needed 120 | * 121 | * @param holder ViewHolder whose state is to be chagned to non playing 122 | */ 123 | private void updateNonPlayingView(AudioItemsViewHolder holder) { 124 | if (holder == playingHolder) { 125 | uiUpdateHandler.removeMessages(MSG_UPDATE_SEEK_BAR); 126 | } 127 | holder.sbProgress.setEnabled(false); 128 | holder.sbProgress.setProgress(0); 129 | holder.ivPlayPause.setImageResource(R.drawable.ic_play_arrow); 130 | } 131 | 132 | /** 133 | * Changes the view to playing state 134 | * - icon is changed to pause 135 | * - seek bar enabled 136 | * - start seek bar updater, if needed 137 | */ 138 | private void updatePlayingView() { 139 | playingHolder.sbProgress.setMax(mediaPlayer.getDuration()); 140 | playingHolder.sbProgress.setProgress(mediaPlayer.getCurrentPosition()); 141 | playingHolder.sbProgress.setEnabled(true); 142 | if (mediaPlayer.isPlaying()) { 143 | uiUpdateHandler.sendEmptyMessageDelayed(MSG_UPDATE_SEEK_BAR, 100); 144 | playingHolder.ivPlayPause.setImageResource(R.drawable.ic_pause); 145 | } else { 146 | uiUpdateHandler.removeMessages(MSG_UPDATE_SEEK_BAR); 147 | playingHolder.ivPlayPause.setImageResource(R.drawable.ic_play_arrow); 148 | } 149 | } 150 | 151 | void stopPlayer() { 152 | if (null != mediaPlayer) { 153 | releaseMediaPlayer(); 154 | } 155 | } 156 | 157 | @Override 158 | public boolean handleMessage(Message msg) { 159 | switch (msg.what) { 160 | case MSG_UPDATE_SEEK_BAR: { 161 | playingHolder.sbProgress.setProgress(mediaPlayer.getCurrentPosition()); 162 | uiUpdateHandler.sendEmptyMessageDelayed(MSG_UPDATE_SEEK_BAR, 100); 163 | return true; 164 | } 165 | } 166 | return false; 167 | } 168 | 169 | // Interaction listeners e.g. click, seekBarChange etc are handled in the view holder itself. This eliminates 170 | // need for anonymous allocations. 171 | class AudioItemsViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, SeekBar.OnSeekBarChangeListener { 172 | SeekBar sbProgress; 173 | ImageView ivPlayPause; 174 | TextView tvIndex; 175 | 176 | AudioItemsViewHolder(View itemView) { 177 | super(itemView); 178 | ivPlayPause = (ImageView) itemView.findViewById(R.id.ivPlayPause); 179 | ivPlayPause.setOnClickListener(this); 180 | sbProgress = (SeekBar) itemView.findViewById(R.id.sbProgress); 181 | sbProgress.setOnSeekBarChangeListener(this); 182 | tvIndex = (TextView) itemView.findViewById(R.id.tvIndex); 183 | } 184 | 185 | @Override 186 | public void onClick(View v) { 187 | if (getAdapterPosition() == playingPosition) { 188 | // toggle between play/pause of audio 189 | if (mediaPlayer.isPlaying()) { 190 | mediaPlayer.pause(); 191 | } else { 192 | mediaPlayer.start(); 193 | } 194 | } else { 195 | // start another audio playback 196 | playingPosition = getAdapterPosition(); 197 | if (mediaPlayer != null) { 198 | if (null != playingHolder) { 199 | updateNonPlayingView(playingHolder); 200 | } 201 | mediaPlayer.release(); 202 | } 203 | playingHolder = this; 204 | startMediaPlayer(audioItems.get(playingPosition).audioResId); 205 | } 206 | updatePlayingView(); 207 | } 208 | 209 | @Override 210 | public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 211 | if (fromUser) { 212 | mediaPlayer.seekTo(progress); 213 | } 214 | } 215 | 216 | @Override 217 | public void onStartTrackingTouch(SeekBar seekBar) { 218 | } 219 | 220 | @Override 221 | public void onStopTrackingTouch(SeekBar seekBar) { 222 | } 223 | } 224 | 225 | private void startMediaPlayer(int audioResId) { 226 | mediaPlayer = MediaPlayer.create(getApplicationContext(), audioResId); 227 | mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { 228 | @Override 229 | public void onCompletion(MediaPlayer mp) { 230 | releaseMediaPlayer(); 231 | } 232 | }); 233 | mediaPlayer.start(); 234 | } 235 | 236 | private void releaseMediaPlayer() { 237 | if (null != playingHolder) { 238 | updateNonPlayingView(playingHolder); 239 | } 240 | mediaPlayer.release(); 241 | mediaPlayer = null; 242 | playingPosition = -1; 243 | } 244 | 245 | } 246 | 247 | } 248 | --------------------------------------------------------------------------------