Android system 8.0 and above must be created to display the "XX application is running" notification problem handling when opening the Service

background:

For Android system 8.0 and above, the startForegroundService(Intent intent) method must be used to start the Service , and the corresponding Service must be set to startForeground(int id, Notification notification) , so we must create a notification so that when the service is running, it will always display a " xx is running" similar notice.

aims:

Eliminate "xx is running" notification content

solution:

Use of official JobService , by JobInfo.Builder creates a corresponding demand JobInfo , by JobScheduler.schedule (JobInfo jobInfo) to implement Service function

• Android5.0 launches JobService, so system 5.0 and later versions can be used.
• Below Android7.0 version, you can use JobInfo.Builder.setPeriodic(long intervalMillis) to freely set the task execution interval.
• The minimum interval for task execution of Android7.0 and later system versions is limited to JobInfo.getMinPeriodMillis() , which is 15 minutes . But the second parameter of setPeriodic (long intervalMillis, long flexMillis) can set the window time for the next task execution, the time is JobInfo.getMinFlexMillis() (5 minutes) or 5% of the task interval time , whichever is greater Who. The specific task execution is as follows

Code example:

JobService example

import android.app.job.JobParameters;
import android.app.job.JobService;
import android.os.Build;
import android.support.annotation.RequiresApi;


/**
 * created by z on 2018/11/19
 * 系统5.0以上使用的服务
 */
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class CowboyJobService extends JobService {

    @Override
    public boolean onStartJob(JobParameters jobParameters) {

        //此处进行自定义的任务
        return false;
    }

    @Override
    public boolean onStopJob(JobParameters jobParameters) {
        return false;
    }
}

The JobService is declared in the <application></application> tag of AndroidManifest.xml 

//具体的JobService名字和路径以自己编写的为准
<service
            android:name=".service.CowboyJobService"
            android:permission="android.permission.BIND_JOB_SERVICE" />

 Start running JobService

//开启JobService服务：CowboyJobService.class为上边创建的JobService
    public static void startPollingService(Context context) {

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

            JobInfo.Builder builder = new JobInfo.Builder(1, new ComponentName(context, CowboyJobService.class));
            builder.setMinimumLatency(0)
                    .setBackoffCriteria(JobInfo.DEFAULT_INITIAL_BACKOFF_MILLIS, JobInfo.BACKOFF_POLICY_LINEAR);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                builder.setPeriodic(JobInfo.getMinPeriodMillis(), JobInfo.getMinFlexMillis());
            } else {
                builder.setPeriodic(TimeUnit.MINUTES.toMillis(5));
            }

            JobScheduler jobScheduler = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
            if (jobScheduler != null) {
                jobScheduler.schedule(builder.build());
            }

        } else {

            //系统5.0以下的可继续使用Service
        }
    }