Question

我正在尝试开发一款应用，让我可以在每天的特定时间设置重复闹钟，例如每天下午3点15分。到目前为止，我已经设法让它在状态栏中发送通知，以便在第一天下午3点15分发出通知，但第二天它没有引发另一个警报。以下是我编写的一些代码

设置闹钟

public void setAlert(Long taskId, Calendar when) {
    Intent i = new Intent(mContext, OnAlarmReceiver.class);
    i.putExtra(AlertsDbAdapter.FLD_ROWID, (long)taskId);

    PendingIntent pi = PendingIntent.getBroadcast(mContext, 0, i, PendingIntent.FLAG_ONE_SHOT);
    mAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP, when.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pi);
}

唤醒设备

public static void acquireStaticLock(Context context) {
    getLock(context).acquire();
}

synchronized private static PowerManager.WakeLock getLock(Context context) {
    if (lockStatic==null) {
        PowerManager mgr=(PowerManager)context.getSystemService(Context.POWER_SERVICE);
        lockStatic=mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
                                                    LOCK_NAME_STATIC);
        lockStatic.setReferenceCounted(true);
    }
    return(lockStatic);
}

public WakeAlertIntentService(String name) {
    super(name);
}

@Override
final protected void onHandleIntent(Intent intent) {
    try {
        doAlertWork(intent);
    }
    finally {
        getLock(this).release();
    }
}

设置通知

NotificationManager mgr = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        Intent notificationIntent = new Intent(this, AlertDisplay.class); 
        notificationIntent.putExtra(AlertsDbAdapter.FLD_ROWID, rowId); 

        PendingIntent pi = PendingIntent.getActivity(this, 0, notificationIntent, PendingIntent.FLAG_ONE_SHOT); 

        Notification note=new Notification(android.R.drawable.stat_sys_warning, "alert", System.currentTimeMillis());
        note.setLatestEventInfo(this, "Test Alert", "alert", pi);
        note.defaults |= Notification.DEFAULT_SOUND; 
        note.flags |= Notification.FLAG_AUTO_CANCEL; 

        int id = (int)((long)rowId);
        mgr.notify(id, note);

broadcastreceiver的代码

public class OnAlarmReceiver extends BroadcastReceiver {

private static final String TAG = ComponentInfo.class.getCanonicalName（）;

@Override   
public void onReceive(Context context, Intent intent) {
    Log.d(TAG, "Received wake up from alarm manager.");

    long rowid = intent.getExtras().getLong(AlertsDbAdapter.FLD_ROWID);

    WakeAlertIntentService.acquireStaticLock(context);

    Intent i = new Intent(context, AlertService.class); 
    i.putExtra(AlertsDbAdapter.FLD_ROWID, rowid);  
    context.startService(i);
}

}

我在代码的某个地方遗漏了什么？

Answer 1

我认为你需要一个broadcastreciever课来了解下次何时触发警报。请参阅此tutorial: Alarm Notification

和aslo Android的警报管理器在设备重新启动时不记得警报。要恢复警报，您需要执行以下步骤：

<强> 1。在设置警报的活动中，还将有关每个警报的信息保存到数据库中。

<强> 2。创建一个额外的BroadcastReceiver，在启动时调用它以重新安装警报。

要了解更多信息，请参阅API Demo's - Alarm

如何设置重复警报

1 个答案: