I have a few questions about an application I want to develop.

  1. I'm trying to find out if it's possible to make a feature that sets the message / ringtone volume from the device (not the application alone) to lets say 20%.

  2. Is it possible to check the volume from the device? So that I can check at all times if the volume is lower than 20%.

  3. Is it possible to make an app run 24/7, so I can always check the volume?

Android Studio and Flutter is both fine.


Solution 1: Ediz Kaplan

 public class TestExample extends Activity
{

private SeekBar volumeSeekbar = null;
private AudioManager audioManager = null; 

@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setVolumeControlStream(AudioManager.STREAM_MUSIC);
    setContentView(R.layout.main);
    initControls();
}

private void initControls()
{
    try
    {
        volumeSeekbar = (SeekBar)findViewById(R.id.seekBar1);
        audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
        volumeSeekbar.setMax(audioManager
                .getStreamMaxVolume(AudioManager.STREAM_MUSIC));
        volumeSeekbar.setProgress(audioManager
                .getStreamVolume(AudioManager.STREAM_MUSIC));   

        volumeSeekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() 
        {
            @Override
            public void onStopTrackingTouch(SeekBar arg0) 
            {
            }

            @Override
            public void onStartTrackingTouch(SeekBar arg0) 
            {
            }

            @Override
            public void onProgressChanged(SeekBar arg0, int progress, boolean arg2) 
            {
                audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,
                        progress, 0);
            }
        });
    }
    catch (Exception e) 
    {
        e.printStackTrace();
    }
}


Solution 2: mHvNG

For this project I used the volume library. This library lets you change all the different kind of volumes inside Android.

My code:

@override
  void initState() {
      super.initState();
      audioManager = AudioManager.STREAM_NOTIFICATION;
      initPlatformState();
      const fiveSec = const Duration(seconds: 15);
      timer = new Timer.periodic(fiveSec, (Timer timer) => setState(
        () {
          updateVolumes();
        }
      ));
  }

  Future<void> initPlatformState() async {
    await Volume.controlVolume(AudioManager.STREAM_NOTIFICATION);
  }

  updateVolumes() async {
    setState(() {

    });
    currentVol = await Volume.getVol;
    if (currentVol < minimumVol) {
      print('Volume needs some adjustments...');
      setVol(minimumVol);
    } else {
      print('Volume is fine!');
    }
  }

  setVol(int i) async {
    await Volume.setVol(i);
  }