Stop Device ringing through Alarm Ringtone android studio

I am ringing my device in different activity and stopping it in different activity. But the problem is device ringing is starting and stopping in same activity but not stopping in different activity..

The code is

     Ringtone ringtone;

     ringtone = RingtoneManager.getRingtone(mContext.getApplicationContext(),
                RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE));

     AudioManager audioManager = (AudioManager) mContext.getApplicationContext().getSystemService(AUDIO_SERVICE);
     int volume = audioManager.getStreamMaxVolume(AudioManager.STREAM_ALARM);

        audioManager.setStreamVolume(AudioManager.STREAM_ALARM, volume, AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);

     ringtone.setStreamType(AudioManager.STREAM_ALARM);

     ringtone.stop(); //ringing is not stoping

Is there any other way to stop forcefully all ringing in my device..

from Stop Device ringing through Alarm Ringtone android studio