java - 如何在android中检查JobService是否正在运行？

Question

我在我的项目中使用 JobService。它运作良好。但有时服务会停止。它不会重新启动。因此，如果 JobService 未运行，我将尝试对其进行分层。但我不知道如何检查 JobService 是否已经在运行。请告诉我如何检查 JobService 是否正在运行。

我的工作服务类:

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class JobService extends android.app.job.JobService {
    @Override
    public boolean onStartJob(JobParameters params) {
        if (NetworkHandler.getInstance().isNetworkAvailable()) {
            TaskHandler.getInstance().getTaskListFromServer(PreferenceManagerForPlannedRoute.getInstance().getLastSyncTime(), PreferenceManagerForPlannedRoute.getInstance().getInProgressMoveTask());
            NotificationUtils.getInstance().CreateNotification();
            Logger.d("Scheduler", "Working!!");
        } else {
            Logger.d("Network", "not available");
        }
        return false;
    }


    @Override
    public boolean onStopJob(JobParameters params) {
        Logger.d("onStopJob", "Stopped");
        return true;
    }
}

我的实用程序类:

public class JobSchedulerUtils {

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public static void scheduleJob(Context context) {
        ComponentName serviceComponent = new ComponentName(context, JobService.class);
        JobInfo.Builder builder = new JobInfo.Builder(0, serviceComponent);
        builder.setRequiresDeviceIdle(false);
        builder.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY);
        builder.setPeriodic(5000);
        builder.setPersisted(true);           
        JobScheduler jobScheduler = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
        jobScheduler.schedule(builder.build());
    }
}

开始:

synchronized public void startAlarmManager() {
        if(Build.VERSION.SDK_INT>=21) {
            JobSchedulerUtils.scheduleJob(Application.getInstance().getApplicationContext());
        }else {
            Intent myIntent = new Intent(Application.getInstance(), AlarmManagerForPlannedRoute.class);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(Application.getInstance(), 0, myIntent, 0);
            AlarmManager alarmManager = (AlarmManager) Application.getInstance().getSystemService(Context.ALARM_SERVICE);
            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis(), Constants.TIME_DELAY_FOR_TASK_LIST_SERVICE_CALL_IN_SECONDS * 1000, pendingIntent);
        }
    }

停止:

 synchronized private void stopAlarmManager(Activity activity) {
        if(Build.VERSION.SDK_INT>=21){
            JobScheduler jobScheduler = (JobScheduler) Application.getInstance().getApplicationContext().getSystemService(Context.JOB_SCHEDULER_SERVICE);
            jobScheduler.cancelAll();
        }else {
            Intent myIntent = new Intent(activity, AlarmManagerForPlannedRoute.class);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(activity, 0, myIntent, 0);
            AlarmManager alarmManager = (AlarmManager) activity.getSystemService(Context.ALARM_SERVICE);
            alarmManager.cancel(pendingIntent);
        }
    }

Answer 1

我得到了解决方案。

public static boolean isJobServiceOn( Context context ) {
    JobScheduler scheduler = (JobScheduler) context.getSystemService( Context.JOB_SCHEDULER_SERVICE ) ;

    boolean hasBeenScheduled = false ;

    for ( JobInfo jobInfo : scheduler.getAllPendingJobs() ) {
        if ( jobInfo.getId() == JOB_ID ) {
            hasBeenScheduled = true ;
            break ;
        }
    }

    return hasBeenScheduled ;
}

使用此方法我们可以检查 jobService 是否正在运行。