Apps unable to set ringer mode correctly

[pablob68]

Hi,
in my app there is a main activity and a broadcast receiver class (on a separate file) on phone_state change. The broadcast receiver is registered in the manifest file and it work fine. I put the phone in silence mode. When the application is in foreground and the phone ring, in a broadcast receiver I set ringermode to normal. The first time the phone ring (silent mode), I see disappear the silent mode symbol correctly but the audio is not available. The next time everything works fine. Can anyone help me?
many thanks!
My broadcast receiver:
public class Myinterceptor extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
AudioManager mode;
mode = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
mode.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
}
}