Question

我想在上午9点设置闹钟，每天只执行一次并且使用这个警报我想执行一个BroadcastReciver并通过该BroadcastReciver 我想执行服务。我使用以下代码，但在下面的代码中是问题 1）警报不会在确切的上午9点执行。 2）执行时执行多次

请帮我解决这个问题。任何帮助都会很明显。

=============================================== ============ 如果用户按下单击以自定义b

，则来自此活动的breakfastflag的值为boolean

     if(breakfastflag){
        Intent myIntent = new Intent(SplashScreenActivity.this, MyBreakfastReciver.class);
          System.out.println("getting Breakfast Reminder");
        pendingIntent = PendingIntent.getBroadcast(SplashScreenActivity.this, 0, myIntent,0);
        // Set the alarm to start at approximately 9:00 a.m.
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.HOUR_OF_DAY, 9);
        AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
        // With setInexactRepeating(), you have to use one of the AlarmManager interval
        // constants--in this case, AlarmManager.INTERVAL_DAY.
         alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);
    }



   BreakfastReciever.java

  ==============================
 public class MyBreakfastReciver extends BroadcastReceiver
 {

@Override
 public void onReceive(Context context, Intent intent)
{
   Intent service1 = new Intent(context, MyBreakfastAlarmService.class);
   context.startService(service1);

  }

}

  MyBreakfastAlarmService.java

 ===================================

        public class MyBreakfastAlarmService extends Service 

       {
      private NotificationManager mManager;

      @Override
     public IBinder onBind(Intent arg0)
    {
   // TODO Auto-generated method stub
    return null;
    }

   @Override
   public void onCreate() 
   {
   // TODO Auto-generated method stub  
   super.onCreate();
    }

   @SuppressWarnings("static-access")
   @Override
   public void onStart(Intent intent, int startId)
   {  

   DatabaseHandler db=new DatabaseHandler(getApplicationContext());
   HashMap<String,String> user = new HashMap<String,String>();
   String abc="Breakfast";
   user= db.getUserCalDetails();
   String userid=user.get("userid");

    final Calendar c = Calendar.getInstance();
    int  mYear = c.get(Calendar.YEAR);
    int   mMonth = c.get(Calendar.MONTH);
    int   mDay = c.get(Calendar.DAY_OF_MONTH);
     String day="";
     String month="";
     mMonth=mMonth+1;

    if(mMonth<=9){

        month="0"+mMonth;

    }
    else{

        month=""+month;
    }

   if(mDay<=9){

        day="0"+mDay;

    }
    else{

        day=""+mDay;
    }

     String year=mYear+"";

    String finalDate=year+"-"+month+"-"+day;   
    int ab=db.getMealDettailsForRemider(userid,abc ,finalDate);

    if(ab==0) 
   {


     showNotification(this); 
   }


   }



   @SuppressLint("NewApi") private void showNotification(Context context) {
    NotificationCompat.Builder mBuilder =
           new NotificationCompat.Builder(context)
           .setSmallIcon(R.drawable.capture)
           .setAutoCancel(true)
           .setContentTitle("DietGuru")
           .setContentText("You haven't logged your Breakfast for today.")
           .setSubText("Would you like to do it now?")


           ;



  // Creates an explicit intent for an Activity in your app
   Intent resultIntent = new Intent(context, SplashScreenActivity.class);

   // The stack builder object will contain an artificial back stack for the
   // started Activity.
   // This ensures that navigating backward from the Activity leads out of
   // your application to the Home screen.
   TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
   // Adds the back stack for the Intent (but not the Intent itself)
   stackBuilder.addParentStack(SplashScreenActivity.class);

   // Adds the Intent that starts the Activity to the top of the stack
   stackBuilder.addNextIntent(resultIntent);


   PendingIntent resultPendingIntent =
           stackBuilder.getPendingIntent(
               0,
               PendingIntent.FLAG_UPDATE_CURRENT
           );
   mBuilder.setContentIntent(resultPendingIntent);
   mBuilder.setContentIntent(resultPendingIntent);
   mBuilder.setDefaults(Notification.DEFAULT_ALL);

   NotificationManager mNotificationManager =
           (NotificationManager)  context.getSystemService(Context.NOTIFICATION_SERVICE);
   // mId allows you to update the notification later on.

 mNotificationManager.notify(1, mBuilder.build());

  }

 @Override
 public void onDestroy() 
 {

     super.onDestroy();
  }

  }

Answer 1

您应该使用setRepeating()代替setInexactRepeating()。

修改

我注意到你的代码中还有两个错误：

1。您已拨打mBuilder.setContentIntent(resultPendingIntent)两次。你应该只调用一次。我想这就是警报可能不止一次出现的原因。

2。您已撰写month=""+month;。它应该是month=""+mMonth;

试试这个。这应该有用。

编辑2：

根据文件：

as of API 19, all repeating alarms are inexact. If your application needs precise delivery times then it must use one-time exact alarms, rescheduling each time as described above. Legacy applications whose targetSdkVersion is earlier than API 19 will continue to have all of their alarms, including repeating alarms, treated as exact.

要获得完全时间，唯一的方法是使用setExact()每次警报响起时都需要设置，因为它不会重复。

应用程序关闭时，警报管理器不会按时触发

1 个答案: