运行服务即使在应用程序关闭（终止） [英] run service even if the application is closed (killed)

问题描述

我想，即使在应用程序关闭该服务运行（kiiled），或者即使用户不启动应用程序。
我想服务启动安装应用程序后从这个角度，服务应始终运行。

I want that this service run even if the application is closed (kiiled) or even if the user dont start the app. i want the service start after the application is installed and from this point, the service should run always.

public class notifications extends Service {

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

        @Override
    public void onCreate() {
    }

    @Override
    public void onStart(Intent intent, int startId) {
                final Handler handler = new Handler();
                final Runnable runb = new Runnable()
                {
                    public void run()
                    {
                        Toast.makeText(getApplicationContext(), " Service Started", Toast.LENGTH_LONG).show();
                        handler.postDelayed(this, 10000);
                    }
                };
                handler.postDelayed(runb, 0);

    }
    @Override
    public void onDestroy() {

    }
}*/

public class notifications extends IntentService
{
        private Timer mBackGroundTimer;
        public notifications()
    {
        super("myservice");
        this.mBackGroundTimer=new Timer();
    }
        @Override
        protected void onHandleIntent(Intent intent)
    {
        // TODO Auto-generated method stub
        mBackGroundTimer.schedule(new TimerTask()
        {
            public void run()
            {
                try
                {
                        Notification("This is message from Dipak Keshariya (Android Application Developer)", "This is Android Notification Message");
                }
                catch (Exception e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        },1000, 2000);
    } // END onHandleIntent()
        private void mStopTimer()
    {
        //Call this whenever you need to stop the service
        mBackGroundTimer.cancel();
    }

        private void Notification(String notificationTitle, String notificationMessage) {
            NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            android.app.Notification notification = new android.app.Notification(R.drawable.ic_launcher, "A New Message from Dipak Keshariya (Android Developer)!",
            System.currentTimeMillis());

            Intent notificationIntent = new Intent(this, MainActivity.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
            notification.setLatestEventInfo(getApplicationContext(), notificationTitle, notificationMessage, pendingIntent);
            notificationManager.notify(10001, notification);
        }
}

我怎么能做到这一点？

how i can do that?

推荐答案

看你的code，看来你希望你的服务，定期给予通知。

Looking at your code, it appears you want your service to periodically give notifications.

至于有它连续运行得好，请记住，在设计上，Android系统可以在任何时候终止您的服务进程。你可以影响这个有点，但你不能杀死你的服务prevent系统。

As far as having it run continuously goes, keep in mind that by design, the Android system may terminate your service process at any time. You can influence this a bit, but you cannot prevent the system from killing your service.

因此​​，对于你的行为周期性，这将是最好使用带有AlarmManager一个反复出现的警报。然后，您的服务将主要是一次性的，即一次，然后执行的操作退出。

So for your periodical actions, it would be best to use AlarmManager with a recurring alarm. Your service would then basically be one-shot, i.e. perform the action once and then exit.

对于一些code，看看这里例如：

For some code, look here for example:

安卓报警管理系统

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