如何在Android上创建音频示波器

我正在用示波器创建一个音频录音应用程序。我使用下面的代码进行录音，现在我添加oscilloscopse，如图所示。我的要求是示波器的波形应该根据用户的语音音调为zigzac。我已经尝试了很长时间，但我找不到解决方案。我没有任何想法来实现示波器。请帮助我如何做到这一点，并请提供一些示例代码片段。谢谢。如何在Android上创建音频示波器

录音代码：

recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,RECORDER_SAMPLERATE, RECORDER_CHANNELS,RECORDER_AUDIO_ENCODING, bufferSize); 

    recorder.startRecording(); 
... 

    byte data[] = new byte[bufferSize]; 
    String filename = getTempFilename(); 
    FileOutputStream outputstream = null; 
    try { 
     outputstream = new FileOutputStream(filename, true); 
    } catch (FileNotFoundException e) { 
     Log.e("Error @ writeAudioDataToFile() - 1 ", e.getMessage()); 
    } 

    int read = 0; 

    if (null != outputstream) { 
     while (isRecording) { 
      read = recorder.read(data, 0, bufferSize); 

      if (AudioRecord.ERROR_INVALID_OPERATION != read) { 
       try { 
        outputstream.write(data); 
       } catch (IOException e) { 
        Log.e("Error @ writeAudioDataToFile() - 2 ",e.getMessage()); 
       } 
      } 
     } 

     try { 
      outputstream.close(); 
     } catch (IOException e) { 
      Log.e("Error @ writeAudioDataToFile() - 3 ", e.getMessage()); 
     } 
    }

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