Java 如何在Android中播放.mp4视频作为背景视频？

我看过很多教程，但有些地方不对劲。我有一个简单的主要活动，它的布局上有一个视频视图。我从youtube下载了一段视频，其中.mp4文件大小约为10MB。我在youtube上找到了一个关于videoview的很好的示例，链接如下

公共类MainActivity扩展了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 emulator。当我运行应用程序时，我会出现“无法播放此”错误。在android监视器上会出现类似这样的情况

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.

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如何修复它？

您需要启动bgVideo.start-inside onPrepare

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

请尝试以下代码：

 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();
                }
            });

---

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();

---

另外，您使用的API版本是什么？

您可以使用

MediaPlayer

对象并在一个服务中播放。下面是示例代码：

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;
        }
    }

---

检查。尝试在设备上运行而不是模拟或使用android 7.0 API 24。@Timosis是否尝试在onPreparedListener之后使用video.start？是的，但结果相同。我发现了这个问题。在android 4.1之前，方法是android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.UpdatentFilter（android.graphics.PorterDuffColorFilter、android.content.res.ColorStateList、android.graphics.PorterDuff$模式）会错误地覆盖android.graphics.drawable.drawable中的包私有方法是否尝试了其他视频？抱歉，结果是相同的！