1. stackoverflow.com

    I've started programming for Android 3 days ago, and today I wanted to do something more difficult using some classes from android Api. I find class Visualizer and at first attemp I had a problem. I read many post on different forums people who had the same problems : cannot initialize visualizer engine.
  2. forum.earlybird.club

    According to the reference API documentation for Visualizer, ERROR_NO_INIT is due to 'Operation failed due to bad object initialization.' Not much help. ... Cannot initialize Visualizer engine, error: -3 at android.media.audiofx.Visualizer.<init>(Visualizer.java:218) at com.alexpech.visualisertest.VisualiserActivity.setupVisualiserFxAndUI ...
  3. developer.android.com

    Build AI-powered Android apps with Gemini APIs and more. Get started Core areas; Get the samples and docs for the features you need. Samples User interfaces ... Browse API reference documentation with all the details. Android platform Jetpack libraries Compose libraries ...
  4. apilevels.com

    A quick reference table of Android versions with SDK & API levels, version codes, codenames, cumulative usage, and more. Android API Levels. ... Android 3: Level 13 Android 3.2: HONEYCOMB_MR2: Honeycomb: No data: Level 12 Android 3.1: HONEYCOMB_MR1: Level 11 Android 3.0: HONEYCOMB: Android 2:
  5. But in "snoop" mode vizs are not active. My device is not from Samsung or HTC - I test program on rather old Huawei MediaPad S7-301 with Android 4.0.3 (API 15). I got signal from Visualizer only when my device plays system sounds but not music. I tried different players including several rare progs. So strange cause Android on old Huawei ...
  6. Looking at the Android Visualizer API, it actually provides both the FFT data and the waveform data, so we could do the same. Although you could argue we only need the latter, both Android and iOS provide us accelerated implementations of FFT which we should take advantage of.
  7. studytonight.com

    Jun 26, 20233. Are there any libraries or APIs available for implementing audio visualizers in Android? Yes, there are several libraries and APIs available for implementing audio visualizers in Android, such as Visualizer API, ExoPlayer, and third-party libraries like AudioWaves and AudioVisualizationView.
  8. dzolnai.medium.com

    An example visualizer. These animating bars are called a visual equalizer, or visualizer. If you need to show a similar visualizer in your Android app, then you can use Visualizer class, which is part of the Android framework, and is attaches to your AudioTrack. It works as expected, but has a major drawback: it requires the permission to the microphone.

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  1. Working example from Github

     public void link(MediaPlayer player)
      {
        if(player == null)
        {
          throw new NullPointerException("Cannot link to null MediaPlayer");
        }
    
        // Create the Visualizer object and attach it to our media player.
        mVisualizer = new Visualizer(player.getAudioSessionId());
        mVisualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]);
    
        // 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);
          }
        };
    
        mVisualizer.setDataCaptureListener(captureListener,
            Visualizer.getMaxCaptureRate() / 2, true, true);
    
        // Enabled Visualizer and disable when we're done with the stream
        mVisualizer.setEnabled(true);
        player.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
        {
          @Override
          public void onCompletion(MediaPlayer mediaPlayer)
          {
            mVisualizer.setEnabled(false);
          }
        });
      }

    and also check AudioFxDemo in Android developer site and .

    --Zar E Ahmer

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