Android Visualizer仅在Android 6.0中出错

Question

我发现一个与Visualizer相关的问题只发生在Android 6.0设备中.真的不知道它为什么会发生,所以任何形式的帮助都会受到赞赏.这是错误堆栈:

AudioEffect: set(): AudioFlinger could not create effect, status: -1
visualizers-JNI: Visualizer initCheck failed -3
Visualizer-JAVA: Error code -3 when initializing Visualizer.
java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -3
System.err: at android.media.audiofx.Visualizer.<init>(Visualizer.java:218)
System.err:     at com.xxx.xxxx.customviews.visualizer.VisualizerView.link(VisualizerView.java:101)

以下是导致它的代码:

public void link(MediaPlayer player) {

    if (player == null) {

        throw new NullPointerException("Cannot link to null MediaPlayer");
    }

    Equalizer mEqualizer = new Equalizer(0, player.getAudioSessionId());
    mEqualizer.setEnabled(true); // need to enable equalizer


    try {

        int aud = player.getAudioSessionId();
        **mVisualizer = new Visualizer(aud);**
        mVisualizer.setEnabled(false);
        mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
        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);
            }
        };

        mVisualizer.setDataCaptureListener(captureListener, Visualizer.getMaxCaptureRate() / 2, true, true);
        mVisualizer.setEnabled(true);
        player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mediaPlayer) {
                mVisualizer.setEnabled(false);
            }
        });
    }catch(Exception e) {       

        e.printStackTrace();        
    } 
}

任何帮助,将不胜感激.在此先感谢=)

Answer 1

也许底层组件需要一些不会在6.0中自动获得授权的权限.转到这个应用程序的AppInfo; 导航到权限; 确保已授予此应用已请求的所有权限.