MediaPlayer 没有准备

Question

我的代码运行良好，然后我在我的项目中编写了另一个 class，返回尝试完全相同的代码并开始出现错误。

这是我的代码：

public class myMediaPlayer extends Activity implements TextureView.SurfaceTextureListener,
        MediaPlayer.OnBufferingUpdateListener, MediaPlayer.OnCompletionListener,
        MediaPlayer.OnPreparedListener, MediaPlayer.OnVideoSizeChangedListener{

private TextureView mTextureView;
private MediaPlayer mMediaPlayer;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_single_channel_player);

    mTextureView = (TextureView)findViewById(R.id.Video);
    mTextureView.setSurfaceTextureListener(this);
    Log.d("debug","Listener Set");

}


@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
    Surface s = new Surface(surface);
    Log.d("debug", "Surface Texture Available");
    try {
        mMediaPlayer = new MediaPlayer();
        try {
            mMediaPlayer.setDataSource(this, Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.t));
        } catch (IOException e) {
            Log.d("IOException", "setDataSource method faulty");
        }
        Log.d("debug", "data source set");
        mMediaPlayer.setSurface(s);
        Log.d("debug", "Surface set");
        try {
            mMediaPlayer.prepare();
        } catch (IOException e) {
            Log.d("IOException", "Prepare method problem");
        }
        Log.d("debug", "prepared");
        mMediaPlayer.setOnBufferingUpdateListener(this);
        mMediaPlayer.setOnCompletionListener(this);
        mMediaPlayer.setOnPreparedListener(this);
        mMediaPlayer.setOnVideoSizeChangedListener(this);
        Log.d("debug", "listeners set");
        mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        Log.d("error", e.getMessage());
    } catch (SecurityException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        Log.d("error", e.getMessage());
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        Log.d("error", e.getMessage());
    }
}

@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
    //TODO
    Log.d("Debug","SurfaceTextureSizeChanged");
}

@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
    Log.d("Debug","SurfaceTextureDestroyed");
    return false;
}

@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
    //TODO
    Log.d("Debug","SurfaceTextureUpdated");
}

@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
    Log.d("Debug","BufferingUpdate");
}

@Override
public void onCompletion(MediaPlayer mp) {
    Log.d("Debug", "Media Player Complete");
}

@Override
public void onPrepared(MediaPlayer mp) {
    Log.d("Debug","Media Player Prepared");
    mp.start();
}

@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
    Log.d("Debug","VideoSizeChanged");
}

@Override
public void onDestroy() {
    Log.d("Debug","Activity Destroyed");
    if (mMediaPlayer != null) mMediaPlayer.release();
}

}

这与演示所做的几乎完全相同。它工作了一段时间，但突然 prepare 方法出错（我在我的日志中得到 "prepare method error"）。有人知道为什么它突然停止工作了吗？

这是 LogCat 输出：

01-12 20:18:10.530 23003-23003/com.edifyelectronics.tv.app W/ActivityThread﹕ Application com.edifyelectronics.tv.app can be debugged on port 8100... 01-12 20:18:10.559 23003-23003/com.edifyelectronics.tv.app D/debug﹕ Listener Set 01-12 20:18:10.570 23003-23023/com.edifyelectronics.tv.app D/OpenGLRenderer﹕ Render dirty regions requested: true 01-12 20:18:10.579 23003-23003/com.edifyelectronics.tv.app D/Atlas﹕ Validating map... 01-12 20:18:10.608 23003-23023/com.edifyelectronics.tv.app I/Adreno-EGL﹕ : QUALCOMM Build: 10/28/14, c33033c, Ia6306ec328 01-12 20:18:10.609 23003-23023/com.edifyelectronics.tv.app I/OpenGLRenderer﹕ Initialized EGL, version 1.4 01-12 20:18:10.637 23003-23023/com.edifyelectronics.tv.app D/OpenGLRenderer﹕ Enabling debug mode 0 01-12 20:18:10.742 23003-23003/com.edifyelectronics.tv.app D/debug﹕ Surface Texture Available 01-12 20:18:11.080 23003-23003/com.edifyelectronics.tv.app D/debug﹕ data source set 01-12 20:18:11.082 23003-23003/com.edifyelectronics.tv.app D/debug﹕ Surface set 01-12 20:18:11.176 23003-23021/com.edifyelectronics.tv.app E/MediaPlayer﹕ error (1, -2147483648) 01-12 20:18:11.177 23003-23003/com.edifyelectronics.tv.app D/IOException﹕ Prepare method problem 01-12 20:18:11.177 23003-23003/com.edifyelectronics.tv.app D/debug﹕ prepared 01-12 20:18:11.177 23003-23003/com.edifyelectronics.tv.app D/debug﹕ listeners set

Answer 1

不是答案或解决方案，但什么也没做，它突然又开始工作了。

MediaPlayer 没有准备

MediaPlayer not preparing

android

android-mediaplayer