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我用 release 和 new 重新创建每个轨道的媒体播放器。但是如何重新创建可视化工具?当我调用发布并创建新的可视化器时,我有新的线程可视化器,因为旧线程不会自动完成。如果我不重新创建可视化工具,那么他的 AudioSessionId 错误。如何使用可视化工具???如果 mediaplayer 确实重新创建每个音轨,则使用 mediaplayer?

例如一些代码(来自我的大应用程序):

public class VisualizerView extends View {
  private static final String TAG = "VisualizerView";

  private byte[] mBytes;
  private byte[] mFFTBytes;
  private Rect mRect = new Rect();
  private static Visualizer mVisualizer;

  private static Set<Renderer> mRenderers;

  private Paint mFlashPaint = new Paint();
  private Paint mFadePaint = new Paint();

  public VisualizerView(Context context, AttributeSet attrs, int defStyle)
  {
    super(context, attrs);
    init();
  }


public void link(MediaPlayer player)
  {
    if(player == null)
    {
      throw new NullPointerException("Cannot link to null MediaPlayer");
    }
    // Pass through Visualizer data to VisualizerView
    Visualizer.OnDataCaptureListener captureListener = new Visualizer.OnDataCaptureListener()
    {
      @Override
      public void onWaveFormDataCapture(Visualizer visualizer, byte[] bytes,
          int samplingRate)
      {
        updateVisualizer(bytes);
      }

      @Override
      public void onFftDataCapture(Visualizer visualizer, byte[] bytes,
          int samplingRate)
      {
        updateVisualizerFFT(bytes);
      }
    };
    // Create the Visualizer object and attach it to our media player.
    if (mVisualizer==null) {
    mVisualizer = new Visualizer(player.getAudioSessionId());
    mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
   mVisualizer.setDataCaptureListener(captureListener, Visualizer.getMaxCaptureRate() / 2, true, true);
   // Enabled Visualizer and disable when we're done with the stream
    mVisualizer.setEnabled(true);
    addBarGraphRenderers();
  } else {
   mVisualizer.setDataCaptureListener(captureListener,
   Visualizer.getMaxCaptureRate() , true, true);
   mVisualizer.setEnabled(true); 
  }}

Upd1:我正在为调用完成重写可视化工具,但这对我没有帮助:

public class visualizer1 extends Visualizer {

    public visualizer1(int audioSession) throws UnsupportedOperationException,
            RuntimeException {
        super(audioSession);
    }
    @Override 
    public void finalize() {
            super.finalize();
    }
}

public void release() {
    if (mVisualizer!=null) {
        mVisualizer.release();
        mVisualizer.finalize();
        mVisualizer=null;
    }
}

我有很多可视化工具: 我的问题

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1 回答 1

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解决了这个问题。当我设置 mVisualizer.setEnabled(false); 在发布可视化工具自动完成之前:

 public void release()
  {
    if (mVisualizer!=null) {
    mVisualizer.setEnabled(false);
    mVisualizer.release();
    mVisualizer=null;
   }
  }

UPD:我测试了我的代码很长一段时间(大约一年),发现如果我这样做了,那么应用程序很少会崩溃并在“mVisualizer.release ();”行出现致命错误。这无法使用库(如 crashlytics)进行跟踪。所以我删除了“mVisualizer.setEnabled (false);”。在 Android 7.0 中,我最多有 3-4 个 Visualizer 线程,这不会导致内存泄漏。

UPD2:我找到了崩溃应用程序的原因。问题在于 mVisualizer.release() 命令;有时它是在可视化渲染时执行的。我添加了一个布尔变量来避免这种情况,现在崩溃已经消失了。享受!

private boolean release = false;
public void release() {
    if (mVisualizer != null) {
        if (cameraLed == true) {
            barGraphRendererBottom.stopCamera();
        }
        if (isShown())
            release = true;
        else {
            release = false;
            mVisualizer.setEnabled(false);
            mVisualizer.release();
            mVisualizer = null;
        }
    }
}
@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    if (release) {
        release = false;
        mVisualizer.setEnabled(false);
        mVisualizer.release();
        mVisualizer = null;
    } else {
        mRect.set(0, 0, getWidth(), getHeight());
        if (mCanvasBitmap == null) {
            mCanvasBitmap = Bitmap.createBitmap(canvas.getWidth(),
                    canvas.getHeight(), Config.RGB_565);
        }
        if (mCanvas == null) {
            mCanvas = new Canvas(mCanvasBitmap);
        }

        canvas.drawBitmap(mCanvasBitmap, new Matrix(), null);
    }
}
于 2014-07-19T21:59:30.540 回答