How do I get the current volume/amplitude in a MediaPlayer?

Question

I\'m working on an app that will both record an audio file, and then have the option to play back that file once it\'s been recorded. The UI has an EQ component that animat

Answer 1

You are in luck. There is a class called Visualizer which will do what you want I think.

import android.app.Activity;
import android.media.audiofx.Visualizer;
import android.os.Bundle;
import android.util.Log;


public class MainActivity extends Activity {
private Visualizer audioOutput = null;
public float intensity = 0; //intensity is a value between 0 and 1. The intensity in this case is the system output volume
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    createVisualizer();

}


private void createVisualizer(){
    int rate = Visualizer.getMaxCaptureRate();
    audioOutput = new Visualizer(0); // get output audio stream
    audioOutput.setDataCaptureListener(new Visualizer.OnDataCaptureListener() {
        @Override
        public void onWaveFormDataCapture(Visualizer visualizer, byte[] waveform, int samplingRate) {
            intensity = ((float) waveform[0] + 128f) / 256;
            Log.d("vis", String.valueOf(intensity));
        }

        @Override
        public void onFftDataCapture(Visualizer visualizer, byte[] fft, int samplingRate) {

        }
    },rate , true, false); // waveform not freq data
    Log.d("rate", String.valueOf(Visualizer.getMaxCaptureRate()));
    audioOutput.setEnabled(true);
}


}

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