As examples, you used some applications for the alarm clock, so I think you can begin to understand that this is the alarm icon in the status bar, and as shown there.
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, Pre-Lollipop:
protected void setStatusBarIcon(boolean enabled)
{
Intent alarmChanged = new Intent("android.intent.action.ALARM_CHANGED");
alarmChanged.putExtra("alarmSet", enabled);
sendBroadcast(alarmChanged);
}
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