java - Nougat - JobScheduler RESULT_SUCCESS 但作业没有输出

Question

我像这样开始工作:

JobScheduler scheduler = (JobScheduler) getSystemService(JOB_SCHEDULER_SERVICE);

    if(scheduler.getPendingJob(JOB_NUMBER) == null) {

        ComponentName componentName = new ComponentName(this, mService.class);
        JobInfo info = new JobInfo.Builder(JOB_NUMBER, componentName)
                .setRequiresCharging(false)
                .setRequiredNetworkType(JobInfo.NETWORK_TYPE_UNMETERED)
                .setPersisted(true)
                .setPeriodic(60 * 60 * 1000)
                .build();

        int resultCode = scheduler.schedule(info);
        if (resultCode == JobScheduler.RESULT_SUCCESS) {
            Log.d(TAG, "Service is not running, Job " + String.valueOf(JOB_NUMBER) + " Scheduled.");
        } else {
            Log.d(TAG, "Service is not running, However job scheduling failed.");
        }

    } else{
        Log.d(TAG, "Service is already scheduled.");
    }

在服务中:

@Override
public boolean onStartJob(JobParameters jobParameters) {

    Log.d("Service", "v1.2 Started");

我得到输出“服务正在运行”，但没有得到“服务已启动”。并且应用程序也没有接收服务应该发送的广播。

这一切在 Android 8 中都能完美运行，但在 7 中则不然。

编辑:我猜该服务必须正在运行，因为当我关闭并重新启动应用程序时，我收到消息“服务已安排”。那么为什么我看不到服务的任何日志输出呢？在牛轧糖中，它会像在奥利奥中一样立即运行吗？或者我必须等待一个小时才能开始？

Answer 1

请尝试这个:

// the service class

import android.app.job.JobParameters;
import android.app.job.JobService;
import android.util.Log;

/**
 * JobService to be scheduled by the JobScheduler.
 * start another service
 */
public class mService extends JobService {
    private static final String TAG = "SyncService";

    @Override
    public boolean onStartJob(JobParameters params) {
        Log.d("TAG", "onStartJobb");
        return true;
    }

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


// in main activity

@RequiresApi(api = Build.VERSION_CODES.N)
public void onResume(){
    super.onResume();

    JobScheduler scheduler = getSystemService(JobScheduler.class);

    if(scheduler.getPendingJob(1) == null) {

        ComponentName componentName = new ComponentName(this, mService.class);
        //JobInfo.Builder builder = new JobInfo.Builder(0, serviceComponent);
        JobInfo.Builder info = new JobInfo.Builder(1, componentName)
                .setRequiresCharging(false)
                .setRequiredNetworkType(JobInfo.NETWORK_TYPE_UNMETERED)
                .setPersisted(true)
                .setMinimumLatency(1 * 1000)
                .setOverrideDeadline(3 * 1000)
                //.setPeriodic(60 * 60 * 1000)
                //.build()
                ;

        int resultCode = scheduler.schedule(info.build());
        if (resultCode == JobScheduler.RESULT_SUCCESS) {
            Log.d("TAG", "Service is not running, Job " + String.valueOf(1) + " Scheduled.");
        } else {
            Log.d("TAG", "Service is not running, However job scheduling failed.");
        }

    } else{
        Log.d("TAG", "Service is already scheduled.");
    }
}

    // and in manifest

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <service
        android:name=".mService"
        android:enabled="true"
        android:exported="true"
        android:label="Word service"
        android:permission="android.permission.BIND_JOB_SERVICE">
    </service>

请下载this示例并从那里导入NotificationScheduler新项目并检查它。请相应地更改您的项目。

我注意到的:

1. list 条目是:

       android:name=".mService"
       android:permission="android.permission.BIND_JOB_SERVICE"
       ></service>
   

2. 作业调度程序:

   ComponentName serviceName = new ComponentName(getPackageName(), mService.class.getName());
   
   long min = JobInfo.getMinPeriodMillis();
   JobInfo.Builder builder = new JobInfo.Builder(JOB_ID, serviceName)
           .setRequiredNetworkType(NETWORK_TYPE_NONE)
           .setRequiresDeviceIdle(false)
           .setPeriodic(5000)
           .setRequiresCharging(false);
   builder.setPeriodic(5 * 1000);
   
   JobInfo myJobInfo = builder.build();
   JobScheduler jobScheduler = (JobScheduler) getSystemService(JOB_SCHEDULER_SERVICE);
   jobScheduler.schedule(myJobInfo);
   

请注意，这里对Periodic min Interval有一个限制，不幸的是它是15分钟，当我们将其设置得更小时，SDK将其更改为15分钟，并且还将Flex间隔设置为5分钟，最后我们得到服务在作业调度时间大约 7-8 分钟后开始。就是这样)。

这对我有用，

祝你好运)