如何使用Android媒体录像机获得最大振幅？

<uses-permission android:name="android.permission.RECORD_AUDIO" />

MediaRecorder recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

recorder.setOutputFile(outputFilePath);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

recorder.prepare();
recorder.start();

MediaRecorder.OnInfoListener infoListener = new MediaRecorder.OnInfoListener() {
    @Override
    public void onInfo(MediaRecorder mr, int what, int extra) {
        if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_AMPLITUDE) {
            int maxAmplitude = mr.getMaxAmplitude();
            // 在这里处理最大振幅的值
        }
    }
};
recorder.setOnInfoListener(infoListener);

recorder.stop();
recorder.release();