Question

我的代码运行完美然后我在我的项目中编写了另一个类，回去尝试完全相同的代码并开始出错。

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();
}

}

这与演示完全相同。它工作了一段时间，但突然出现了prepare方法的错误（我在日志中得到“prepare method error”）。任何人都知道它为什么突然停止工作？

这是LogCat输出：

01-12 20：18：10.530 23003-23003 / com.edifyelectronics.tv.app W / ActivityThread：应用程序com.edifyelectronics.tv.app可以在端口8100 ... 01-12 20：18：10.559上调试 23003-23003 / com.edifyelectronics.tv.app D / debug：Listener Set 01-12 20：18：10.570 23003-23023 / com.edifyelectronics.tv.app D / OpenGLRenderer：渲染请求的脏区：true 01-12 20：18：10.579 23003-23003 / com.edifyelectronics.tv.app D / Atlas：验证地图... 01-12 20：18：10.608 23003-23023 / com.edifyelectronics.tv.app I / Adreno-EGL：：QUALCOMM Build：2014年10月28日，c33033c， Ia6306ec328 01-12 20：18：10.609 23003-23023 / com.edifyelectronics.tv.app I / OpenGLRenderer：已初始化 EGL，版本1.4 01-12 20：18：10.637 23003-23023 / com.edifyelectronics.tv.app D / OpenGLRenderer：启用调试模式0 01-12 20：18：10.742 23003-23003 / com.edifyelectronics.tv.app D / debug：表面纹理可用01-12 20：18：11.080 23003-23003 / com.edifyelectronics.tv.app D / debug：数据源集01-12 20：18：11.082 23003-23003 / com.edifyelectronics.tv.app D / debug：曲面组01-12 20：18：11.176 23003-23021 / com.edifyelectronics.tv.app E / MediaPlayer：错误（1，-2147483648）01-12 20：18：11.177 23003-23003 / com.edifyelectronics.tv.app D / IOException：准备方法问题01-12 20：18：11.177 23003-23003 / com.edifyelectronics.tv.app D / debug：准备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，但没有做任何事情，它只是突然重新开始工作。

MediaPlayer没有准备

1 个答案: