【Exoplayer】简单使用Exoplayer_exoplayer apk

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。

1. 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'
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

2. settings.gradle

pluginManagement {
    repositories {
        gradlePluginPortal()
        google()
        mavenCentral()
    }
}
dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        google()
        mavenCentral()
        jcenter()
    }
}
rootProject.name = "Exoplayer2Example"
include ':app'
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

3. res 生成的文件
   包括各种图标、xml等。
4. 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>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

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();

    }
}


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161