android: 视频: 用ExoPlayer播放在线视频

一，安装第三方库

库地址:

https://mvnrepository.com/artifact/androidx.media3/media3-exoplayer

在build.gradle中添加：

    implementation "androidx.media3:media3-exoplayer:1.7.1"
    implementation "androidx.media3:media3-common:1.7.1"
    implementation "androidx.media3:media3-ui:1.7.1"

然后点击 Sync Now 链接

 说明：

如果media3-exoplayer的库和exoplayer-core的库同时出现在build.gradle,会引发类型错误 

二，代码

xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.Video1Activity">

    <Button
        android:id="@+id/openButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="播放网络视频"
        tools:ignore="MissingConstraints" />

    <androidx.media3.ui.PlayerView
        android:id="@+id/player_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:show_buffering="when_playing"
        app:show_shuffle_button="true"/>

</androidx.constraintlayout.widget.ConstraintLayout>

java

package com.example.okdemo1.activity;

import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;

import com.example.okdemo1.R;

import androidx.media3.common.MediaItem;
import androidx.media3.datasource.DataSource;
import androidx.media3.datasource.DefaultDataSource;
import androidx.media3.exoplayer.ExoPlayer;
import androidx.media3.ui.PlayerView;


public class Video1Activity extends AppCompatActivity {

    private ExoPlayer mPlayer;
    private PlayerView playerView;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video1);

        //得到player view
        playerView = findViewById(R.id.player_view);
        mPlayer = new ExoPlayer.Builder(this).build();
        playerView.setPlayer(mPlayer);

        //点击按钮事件
        Button button2 = findViewById(R.id.openButton);
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Uri uri = Uri.parse("https://docs.evostream.com/sample_content/assets/bun33s.mp4");
                playVideo(uri);
            }
        });
    }

    @Override
    protected void onDestroy() {
        mPlayer.release();
        super.onDestroy();
    }
    
    // 播放视频
    private void playVideo(Uri uri) {
        DataSource.Factory factory = new DefaultDataSource.Factory(this);
        // 创建指定地址的媒体对象
        MediaItem videoItem = new MediaItem.Builder().setUri(uri).build();
        mPlayer.setMediaItem(videoItem);
        mPlayer.prepare();   // 播放器准备就绪
        mPlayer.prepare(); 
        mPlayer.play(); // 播放器开始播放
    }
}

三，测试效果: