How to cancel an alarm in android?

I am trying to cancel all alarms other an intent

i am sending stuff in using new gofile(this).setSilent(mRowId, mCalendar);

that then goes to gofile

  public class gofile {
private Context goon
private AlarmManager alarm;

public gofile(Context goon){
       mContext = context;
       alarm = (AlarmManager)goon.getSystemService(Context.ALARM_SERVICE);


}

public void setSilent(Long Id, Calendar when){
     Intent i = new Intent(gon, anohterclass.class);
     PendingIntent go = PendingIntent.getBroadcast(goon, 0 , i, PendingIntent.FLAG_ONE_SHOT);
     alarm.set(AlarmManager.RTC_WAK开发者_Go百科EUP, when.getTimeInMillis(), go);

how would i cancel the alarms from another file?

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You must use the cancel method, and you must make sure the PendingIntent contains the information than the one you used to set the alarm.