Android 播放视频

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使用 VideoView 播放视频

public class MainActivity extends AppCompatActivity {
    private VideoView videoView;
    private MediaController mController;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 获取界面上的VideoView组件
        videoView = findViewById(R.id.video);
        // 创建MediaController对象
        mController = new MediaController(this);

        startVideo();
    }
    
    private void startVideo() {
        // 设为横屏
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        String path = "android.resource://" + getPackageName() + "/" + R.raw.video;
        videoView.setVideoPath(path); // ①
        // 设置videoView与mController建立关联
        videoView.setMediaController(mController);  // ②
        // 设置mController与videoView建立关联
        mController.setMediaPlayer(videoView);  // ③
        // 让VideoView获取焦点
        videoView.requestFocus();
        videoView.start(); // 开始播放
    }
}

使用 MediaPlayer 和 SurfaceView 播放视频

public class MainActivity extends AppCompatActivity {
    private SurfaceView surfaceView;
    private MediaPlayer mPlayer;
    private ImageButton playBn, pauseBn, stopBn;
    // 记录当前视频的播放位置
    int position = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 创建MediaPlayer
        mPlayer = new MediaPlayer();
        surfaceView = this.findViewById(R.id.surfaceView);
        // 设置播放时打开屏幕
        surfaceView.getHolder().setKeepScreenOn(true);
        surfaceView.getHolder().addCallback(new SurfaceListener());
        // 获取界面上的三个按钮
        playBn = findViewById(R.id.play);
        pauseBn = findViewById(R.id.pause);
        stopBn = findViewById(R.id.stop);

        config();
    }

    private void config() {
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        View.OnClickListener listener = source -> {
            int sourceId = source.getId();

            if (sourceId == R.id.play) {
                playVideo();
            } else if (sourceId == R.id.pause) {
                if (mPlayer.isPlaying()) {
                    mPlayer.pause();
                } else {
                    mPlayer.start();
                }
            } else if (sourceId == R.id.stop) {
                if (mPlayer.isPlaying()) {
                    mPlayer.stop();
                }
            }
        };
        // 为三个按钮的单击事件绑定事件监听器
        playBn.setOnClickListener(listener);
        pauseBn.setOnClickListener(listener);
        stopBn.setOnClickListener(listener);
    }

    private void playVideo() {
        mPlayer.reset();
        AudioAttributes audioAttributes = new AudioAttributes.Builder()
                .setUsage(AudioAttributes.USAGE_MEDIA)
                .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
                .build();
        mPlayer.setAudioAttributes(audioAttributes);
        try {
            // 设置需要播放的视频
            String path = "android.resource://" + getPackageName() + "/" + R.raw.vvideo;
            mPlayer.setDataSource(this, Uri.parse(path));
            // 把视频画面输出到SurfaceView
            mPlayer.setDisplay(surfaceView.getHolder());  // ①
            mPlayer.prepare();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 获取窗口管理器
        WindowManager wManager = getWindowManager();
        DisplayMetrics metrics = new DisplayMetrics();
        // 获取屏幕大小
        wManager.getDefaultDisplay().getMetrics(metrics);
        // 设置视频保持纵横比缩放到占满整个屏幕
        surfaceView.setLayoutParams(new RelativeLayout.LayoutParams(metrics.widthPixels,
                mPlayer.getVideoHeight() * metrics.widthPixels / mPlayer.getVideoWidth()));
        mPlayer.start();
    }

    private class SurfaceListener implements SurfaceHolder.Callback {
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            if (position > 0) {
                // 开始播放
                playVideo();
                // 并直接从指定位置开始播放
                mPlayer.seekTo(position);
                position = 0;
            }
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {

        }
    }

    // 当其他Activity被打开时，暂停播放
    @Override
    public void onPause() {
        super.onPause();
        if (mPlayer.isPlaying()) {
            // 保存当前的播放位置
            position = mPlayer.getCurrentPosition();
            mPlayer.stop();
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        // 停止播放
        if (mPlayer.isPlaying()) mPlayer.stop();
        // 释放资源
        mPlayer.release();
    }
}

摘抄至《疯狂Android讲义（第4版）》