1.目的
本文的目的是记录简单创建一个基于Exoplayer的视频播放软件的最小代码单元,并生成可以使用的APK应用软件。通过本文的代码,能够使用exoplayer播放一个SD卡的本地文件。
本文使用的代码:
Github地址
2.工程文件配置
代码基于Android Studio创建的工程,Android 5.0版本 API21(项目需要所以版本较老)。
编译:直接使用菜单栏Run
运行MainActivity,然后使用Build APKs
生成开发者调试的debug版本的APK。随后,将apk推到需要测试的安卓系统板子上,测试APK是否好用。
3.代码目录
4.需要改动配置的文件
MainActivity。
Gradle下面的文件。
- 在build.gradle(module)里面需要补充程序对Android包的依赖、SDK版本信息、Java版本
plugins {
id 'com.android.application'
}
android {
namespace 'com.example.exoplayer2example'
compileSdk 32
defaultConfig {
applicationId "com.example.exoplayer2example"
minSdk 21
targetSdk 32
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
buildFeatures {
viewBinding true
}
}
dependencies {
implementation 'com.google.android.exoplayer:exoplayer:r2.0.0'
implementation 'androidx.appcompat:appcompat:1.5.1'
implementation 'com.google.android.material:material:1.6.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
implementation 'androidx.navigation:navigation-fragment:2.5.2'
implementation 'androidx.navigation:navigation-ui:2.5.2'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
- settings.gradle
pluginManagement {
repositories {
gradlePluginPortal()
google()
mavenCentral()
}
}
dependencyResolutionManagement {
repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
repositories {
google()
mavenCentral()
jcenter()
}
}
rootProject.name = "Exoplayer2Example"
include ':app'
- res 生成的文件
包括各种图标、xml等。 - AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true"
android:label="@string/app_name"
android:theme="@style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
</application>
</manifest>
5.MainActivity
package com.example.exoplayer2example;
import android.annotation.SuppressLint;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.exoplayer2.DefaultLoadControl;
import com.google.android.exoplayer2.ExoPlaybackException;
import com.google.android.exoplayer2.ExoPlayer;
import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.LoadControl;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.Timeline;
import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
import com.google.android.exoplayer2.extractor.ExtractorsFactory;
import com.google.android.exoplayer2.source.ExtractorMediaSource;
import com.google.android.exoplayer2.source.LoopingMediaSource;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.source.hls.HlsMediaSource;
import com.google.android.exoplayer2.trackselection.AdaptiveVideoTrackSelection;
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
import com.google.android.exoplayer2.trackselection.TrackSelection;
import com.google.android.exoplayer2.trackselection.TrackSelector;
import com.google.android.exoplayer2.ui.SimpleExoPlayerView;
import com.google.android.exoplayer2.upstream.BandwidthMeter;
import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.Util;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private SimpleExoPlayerView simpleExoPlayerView;
private SimpleExoPlayer player;
private ExoPlayer.EventListener exoPlayerEventListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.v(TAG,"starting...");
setContentView(R.layout.activity_main);
// 1. Create a default TrackSelector
Handler mainHandler = new Handler();
BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveVideoTrackSelection.Factory(bandwidthMeter);
TrackSelector trackSelector = new DefaultTrackSelector(mainHandler, videoTrackSelectionFactory);
// 2. Create a default LoadControl
LoadControl loadControl = new DefaultLoadControl();
// 3. Create the player
Log.v(TAG,"create the player");
player = ExoPlayerFactory.newSimpleInstance(this, trackSelector, loadControl);
//4. Create view
simpleExoPlayerView = new SimpleExoPlayerView(this);
simpleExoPlayerView = (SimpleExoPlayerView) findViewById(R.id.player_view);
// Set media controller
simpleExoPlayerView.setUseController(true);
simpleExoPlayerView.requestFocus();
// Bind the player to the view.
simpleExoPlayerView.setPlayer(player);
//6. building cam live stream link:
Log.v(TAG,"parse url");
@SuppressLint("SdCardPath")
String myUrl = "/data/sample_Trim.mp4";
Uri mp4VideoUri = Uri.parse(myUrl);
Log.v(TAG, String.valueOf(mp4VideoUri));
Log.v(TAG,"parse url end");
//Measures bandwidth during playback. Can be null if not required.
DefaultBandwidthMeter bandwidthMeterA = new DefaultBandwidthMeter();
//Produces DataSource instances through which media data is loaded.
//DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(this, Util.getUserAgent(this, "exoplayer2example"), bandwidthMeterA);
DefaultDataSourceFactory dataSourceFactory = new DefaultDataSourceFactory(this, Util.getUserAgent(this, "exoplayer2example"), bandwidthMeterA);
//Produces Extractor instances for parsing the media data.
ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();
//This is the MediaSource representing the media to be played:
//FOR SD CARD SOURCE:
MediaSource videoSource = new ExtractorMediaSource(mp4VideoUri, dataSourceFactory, extractorsFactory, null, null);
//FOR LIVESTREAM LINK:
//MediaSource videoSource = new HlsMediaSource(mp4VideoUri, dataSourceFactory, 1, null, null);
final LoopingMediaSource loopingSource = new LoopingMediaSource(videoSource);
// Prepare the player with the source.
player.setPlayWhenReady(true);
player.prepare(loopingSource);
player.addListener(new ExoPlayer.EventListener() {
@Override
public void onLoadingChanged(boolean isLoading) {
Log.v(TAG,"Listener-onLoadingChanged...");
}
@Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
Log.v(TAG,"Listener-onPlayerStateChanged...");
}
@Override
public void onTimelineChanged(Timeline timeline, Object manifest) {
Log.v(TAG,"Listener-onTimelineChanged...");
}
@Override
public void onPlayerError(ExoPlaybackException error) {
Log.v(TAG,"Listener-onPlayerError...");
player.stop();
player.prepare(loopingSource);
player.setPlayWhenReady(true);
}
@Override
public void onPositionDiscontinuity() {
Log.v(TAG,"Listener-onPositionDiscontinuity...");
}
});
}//End of onCreate
@Override
protected void onStop() {
super.onStop();
Log.v(TAG,"onStop()...");
}
@Override
protected void onStart() {
super.onStart();
Log.v(TAG,"onStart()...");
}
@Override
protected void onResume() {
super.onResume();
Log.v(TAG,"onResume()...");
}
@Override
protected void onPause() {
super.onPause();
Log.v(TAG,"onPause()...");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.v(TAG,"onDestroy()...");
player.release();
}
}