How to set time to silent mode

Question

I have a school schedule app and put the option to mute the device during the time stipulated by the user. However there is only the option to enable and disable silent mode, as I can do this automatically according to the selected time and time of the clock?

Answer 1

If your problem is scheduling activities on Android the best class is the

Alarmmanager

Below is an explanatory passage of an example, to see the full example go to: http://www.techrepublic.com/blog/software-engineer/use-androids-alarmmanager-to-schedule-an-event/

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In your Activity declare the following class variables:

PendingIntent pi;
BroadcastReceiver br;
AlarmManager am;
AudioManager audio;

Create a private method to configure your scheduler. Instantiate the variables and set the broadcast receiver that will receive the callback when the event happens.

private void setup() {
      br = new BroadcastReceiver() {
             @Override
             public void onReceive(Context c, Intent i) {
                    // Escreva aqui o que deve ser executando quando o evento acontecer
                    Toast.makeText(c, "Entrando em modo silencioso!", Toast.LENGTH_LONG).show();
                    //Modo Silencioso
                    audio = (AudioManager) getBaseContext().getSystemService(Context.AUDIO_SERVICE);
                    audio.setRingerMode(AudioManager.RINGER_MODE_SILENT);
             }
      };
      registerReceiver(br, new IntentFilter("com.seuprojeto.suaactivity") );
      pi = PendingIntent.getBroadcast( this, 0, new Intent("com.seuprojeto.suaactivity"),
0 );
      am = (AlarmManager)(this.getSystemService( Context.ALARM_SERVICE ));
}

Call the setup method in the Activity onCreate:

protected void onCreate(Bundle savedInstanceState) {
    ...
    setup();
    ...
}

Set the Alarmmanager in the System of your button:

@Override
public void onClick(View v) {
    long seuTempo = 1000 * 20; // 20 segundos
    am.set( AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + seuTempo, pi );
}

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Follow for the full example in the link:

http://www.techrepublic.com/blog/software-engineer/use-androids-alarmmanager-to-schedule-an-event/