用AlarmManager定时做一些事情

AlarmManager manager = (AlarmManager) getSystemService(ALARM_SERVICE);
		Intent intent = new Intent(EditTextViewDemoActivity.this, AlarmTest.class);
		PendingIntent operation = PendingIntent.getActivity(this, 0, intent, 0);
		Calendar calendar = Calendar.getInstance();
		calendar.setTimeInMillis(System.currentTimeMillis());
		calendar.add(Calendar.SECOND, 15);
		manager.set(0, calendar.getTimeInMillis(), operation);