android中的报警管理器

我创建了简单的报警应用程序.它工作正常但是,如果我手动更改设备的时间,那么我的闹钟不起作用….

这是我的代码：

Calendar = Calendar.geTinstance();
    //c.add(Calendar.DAY_OF_WEEK,1);
    c.set(Calendar.HOUR_OF_DAY,15);
    c.set(Calendar.minutE,00);
    c.set(Calendar.SECOND,00);
    c.set(Calendar.MILLISECOND,0);

    Intent intent = new Intent(HomeActivity.this,MyAlarmservice.class);
    pendingIntent = PendingIntent.getservice(HomeActivity.this,intent,0);
    alarmManager = (AlarmManager) getSystemservice(ALARM_serviCE);
    alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,c.getTimeInMillis(),pendingIntent);

有什么建议吗？

<receiver android:name=".AlarmInitReceiver"> <intent-filter> <action android:name="android.intent.action.bOOT_COMPLETED" /> <action android:name="android.intent.action.TIME_SET" /> <action android:name="android.intent.action.TIMEZONE_CHANGED" /> 
</intent-filter> 
</receiver>