如何在 Android 中将 .mp4 视频作为背景视频播放？

Question

我看过很多教程，但有些地方出了问题。我有简单的 mainactivity，并且它的布局上有一个 VideoView。我从 youtube 下载了一个视频，因为 .mp4 文件大小约为 10 mb。我在 youtube 上找到了一个很棒的关于 videoview 的示例，如下链接所示。

https://www.youtube.com/watch?v=tPeDn18FrGY&t=75s

公共类 MainActivity 扩展 AppCompatActivity {

private VideoView bgVideo;

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

        bgVideo=(VideoView) findViewById(R.id.bg_videoview);

        Uri uri = Uri.parse("android.resource://"+getPackageName()+"/"+R.raw.bgvideo);

        bgVideo.setVideoURI(uri);
        bgVideo.start();

        bgVideo.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.setLooping(true);
            }
        });
    }
}

我使用 genymotion 模拟器。当我运行应用程序时，出现“无法播放”错误。在 android 监视器上是这样的。

06-07 03:16:28.675 2146-2146/com.sample E/MediaPlayer: Error (1,-2147483648)
06-07 03:16:28.675 2146-2146/com.sample D/VideoView: Error: 1,-2147483648
06-07 03:16:28.692 2146-2146/com.sample E/MediaPlayer: Error (1,-2147483648)
06-07 03:16:28.692 2146-2146/com.sample D/VideoView: Error: 1,-2147483648
06-07 03:16:28.709 2146-2146/com.sample E/MediaPlayer: Error (1,-2147483648)
06-07 03:16:28.709 2146-2146/com.sample D/VideoView: Error: 1,-2147483648
06-07 03:16:28.742 2146-2146/com.sample E/MediaPlayer: Error (1,-32)
06-07 03:16:28.742 2146-2146/com.sample D/VideoView: Error: 1,-32
06-07 03:16:28.758 2146-2146/com.sample E/MediaPlayer: Error (1,-38)
06-07 03:16:28.758 2146-2146/com.sample D/VideoView: Error: 1,-38
06-07 03:16:29.526 2146-2146/com.sample I/Choreographer: Skipped 44 frames!  The application may be doing too much work on its main thread.

我该如何解决？

Answer 1

您可以使用MediaPlayer 对象并在一项服务中进行游戏。这是示例代码：

public class Mp3PlayerService extends Service implements
        MediaPlayer.OnCompletionListener, MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener, MediaPlayer.OnSeekCompleteListener {

    /** Android Built-in Media Player */
    public MediaPlayer player;

    /** Binder for Mp3 Service */
    private final IBinder iBinder = new Mp3PlayerService.BackgroundAudioServiceBinder();

    @Override
    public void onCreate() {
        super.onCreate();
        player = new MediaPlayer();
        player.setOnCompletionListener(this);
        player = new MediaPlayer();
        try {
          playSongLocal();
          playSongNetwork();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        }
    }


    private void playsongLocal() {
        AssetFileDescriptor afd;
        player.reset();
        try {
            LogUtils.LOGE(TAG, "playing aaa.mp3");
            afd = getApplicationContext().getAssets().openFd("aaa.mp3");
            player.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
            player.prepareAsync();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void playsongNetwork() {
        player.reset();
        try {
            player.setDataSource(networkUrlLink);
            player.prepareAsync();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        return iBinder;
    }

    @Override
    public boolean onUnbind(Intent intent) {
        return super.onUnbind(intent);
    }

    public void onDestroy() {
        if (player.isPlaying()) {
            player.stop();
        }
        player.release();
    }

    /** return itself when beeing asked */
    public class BackgroundAudioServiceBinder extends Binder {
        public Mp3PlayerService getService() {
            return Mp3PlayerService.this;
        }
    }

Answer 2

你需要在onPrepare里面启动bgVideo.start

bgVideo.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.setLooping(true);
                bgVideo.start();
            }
        });

Answer 3

您是否尝试在 onPreparedListener 之后启动 bgVideo？

bgVideo.setVideoURI(uri);

        bgVideo.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.setLooping(true);
            }
        });

        bgVideo.start();

还有你使用的是什么 API 版本？

Answer 4

试试这个代码：

 try {
            // Start the MediaController
            MediaController mediacontroller = new MediaController(
                    MainActivity.this);
            mediacontroller.setAnchorView(bgVideo);
            // Get the URL from String VideoURL
            Uri uri = Uri.parse("android.resource://"+getPackageName()+"/"+R.raw.bgvideo);

            bgVideo.setMediaController(mediacontroller);
            bgVideo.setVideoURI(uri);

        } catch (Exception e) {
            Log.e("Error", e.getMessage());
            e.printStackTrace();
        }
bgVideo.requestFocus();

    bgVideo.setOnPreparedListener(new OnPreparedListener() {

                public void onPrepared(MediaPlayer mp) {
                    mp.setLooping(true);
                    bgVideo.start();
                }
            });