Android:IntentService 被终止

Question

我有一个 IntentService，它会永远运行，因为我使用的是无限 while 循环。但是，当我关闭我的应用程序时，服务会终止。也许我错了，但据我所知，IntentService 应该在后台运行，直到它完成任务。

此外，由于我使用的是无限 while 循环，因此该服务应该永远运行。但显然这不是正在发生的事情。

public class TaskNotifierService extends IntentService {

    public static final String TAG="TaskNotifierIS";

    public TaskNotifierService(){
        super(TAG);
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        while(true){
            Calendar calendar = Calendar.getInstance();
            int day = calendar.get(Calendar.DAY_OF_WEEK);
            String currentDay=null;

            switch(day){
                case 1:
                    currentDay="Sunday";
                    Log.i("currentDay","Current day is: "+currentDay);
                    break;
                case 2:
                    currentDay="Monday";
                    Log.i("currentDay","Current day is: "+currentDay);
                    break;
                case 3:
                    currentDay="Tuesday";
                    Log.i("currentDay","Current day is: "+currentDay);
                    break;
                case 4:
                    currentDay="Wednesday";
                    Log.i("currentDay","Current day is: "+currentDay);
                    break;
                case 5:
                    currentDay="Thursday";
                    Log.i("currentDay","Current day is: "+currentDay);
                    break;
                case 6:
                    currentDay="Friday";
                    Log.i("currentDay","Current day is: "+currentDay);
                    break;
                case 7:
                    currentDay="Saturday";
                    Log.i("currentDay","Current day is: "+currentDay);
                    break;
            }

            try {
                Thread.sleep(5000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }
    }


}

有人可以解释一下，这里出了什么问题吗？

Answer 1

IntentService 旨在处理传入的 Intent 并在之后立即停止。因此，对于您的情况，我强烈建议您将 IntentService 替换为 Service。

Service和IntentService都会在应用被kill时被kill掉，你可以在service的onCreate函数中注册一个WatchAlarm来在一个可控的时间内自启动。您可以查看以下代码:

@Override
public void onCreate() {
    registerWatchAlarm();
}

private void registerWatchAlarm() {
    AlarmManager am = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
    Intent startSelf = new Intent(this, BoostBallService.class);
    PendingIntent pi = PendingIntent.getService(this, 0, startSelf,
            PendingIntent.FLAG_UPDATE_CURRENT);
    am.setRepeating(AlarmManager.RTC_WAKEUP,
            System.currentTimeMillis() + WAKE_UP_TIME_INTERVAL, WAKE_UP_TIME_INTERVAL, pi);
}