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

问题描述

我希望即使应用程序关闭(kiiled)或者即使用户没有启动应用程序，该服务也能运行.我希望在安装应用程序后启动该服务，从此时起，该服务应始终运行.

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);
        }
}

我该怎么做?

推荐答案

查看您的代码，您似乎希望您的服务定期发出通知.

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

就让它持续运行而言，请记住，根据设计，Android 系统可能会随时终止您的服务进程.您可以对此施加一些影响，但无法阻止系统终止您的服务.

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，对于您的定期操作，最好将 AlarmManager 与重复警报一起使用.您的服务将基本上是一次性的，即执行一次操作然后退出.

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.

对于一些代码，请看这里例如:

For some code, look here for example:

安卓:报警管理器

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