我有一个活动和后台服务。我通过从活动意图启动该服务。该服务将无限期运行，即使该活动已关闭。但这里的问题是，如果我明确从任务管理器中存储的服务站，并没有再次启动，直到活动再次启动。我希望该服务一段时间后内存被清除自动启动。我怎么能做到这一点？请大家帮帮忙。

  AlarmManager服务=（AlarmManager）getApplicationContext（）。getSystemService（
                Context.ALARM_SERVICE）;
            意图I =新的意图（这一点，BackgroundService.class）;
            日历CAL = Calendar.getInstance（）;
            cal.add（Calendar.SECOND，30）;
            PendingIntent未决= PendingIntent.getService（此，0，I，
                PendingIntent.FLAG_CANCEL_CURRENT）;
            service.setInexactRepeating（AlarmManager.RTC_WAKEUP，cal.getTimeInMillis（），30000，待定）;
 

这code是运行backgroundService真正的30000毫秒

I have an Activity and a background Service. I start the Service via Intent from the Activity. The Service runs indefinitely even if the Activity is closed. But the problem here is if I clear the memory from the Task manager the Service stops and is not started again untill the Activity is launched again. I want the Service to start automatically after some time the memory is cleared. How could I achieve this? Please help.

AlarmManager service = (AlarmManager) getApplicationContext().getSystemService(
                Context.ALARM_SERVICE);
            Intent i = new Intent(this, BackgroundService.class);
            Calendar cal = Calendar.getInstance();
            cal.add(Calendar.SECOND, 30);
            PendingIntent pending = PendingIntent.getService(this, 0, i,
                PendingIntent.FLAG_CANCEL_CURRENT);
            service.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),30000, pending);

this code is true 30000 miliseconds run backgroundService