Question

I’m developing an application that can turn off the sound of Android Phone automatically. How can I detect the volume of the sound and turn it off programmatically?

    if (hour == myTime.getHour() && minute == myTime.getMinute()) {
        if (Settings.getSetMyTime(this))
            showNotificationAlarm(R.drawable.icon,
                    "It's time to work");
                    ///so, i want to add the silet function here..help me, please?
    }

Thanks in advance.

Answer 1

Register for AUDIO_SERVICE and then use the AudioManager to control the volume up/down or set profiles.

Or if you want to listen for changes in the Audio focus then make your Activity implements AudioManager.OnAudioFocusChangeListener. Override unimplemented method. Create switch that will take care of types of changes.

Like:

@Override
    public void onAudioFocusChange(int focusChange) {
        switch(focusChange)
        {
        case AudioManager.AUDIOFOCUS_GAIN:
            //do something
            break;
        case AudioManager.AUDIOFOCUS_LOSS:
            break;
        }

Or if you want to listen for changes on the audio output, like unplugging the headphones (switching to phone speaker) use ACTION_AUDIO_BECOMING_NOISY sticky broadcast

http://developer.android.com/reference/android/media/AudioManager.html#ACTION_AUDIO_BECOMING_NOISY

http://developer.android.com/reference/android/media/AudioManager.html#RINGER_MODE_SILENT

See here

Edit: This is the solution. There was no need to handle AudioFocus but just set different ringer profile or adjusting volume

if (hour == myTime.getHour() && minute == myTime.getMinute()) {
        if (Settings.getSetMyTime(this))
            showNotificationAlarm(R.drawable.icon,
                    "It's time to work");
                    AudioManager audiomanager =(AudioManager)YourActivityName.this.getSystemService(Context.AUDIO_SERVICE);
        audiomanager.setRingerMode(AudioManager.RINGER_MODE_SILENT); //or adjust volume here instead setting silent profile for the ringer
    }