为什么就业服务没有重复

Question

我正在尝试开发 JobScheduler，我希望该应用在被系统杀死时每1分钟做某事。

androidManifest.xml

<service
    android:name=".BaiduPush.BaiduJobService"
    android:enabled="true"
    android:permission="android.permission.BIND_JOB_SERVICE"/>

MainActivity

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_main2)

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            startJobService()
        }
}
private fun startJobService() {
        Log.d(TAG,"startBaiduJobService")
        val JOB = 10
        val jobScheler = getSystemService((Context.JOB_SCHEDULER_SERVICE)) as JobScheduler
        val jobinfo = JobInfo.Builder(JOB, ComponentName(packageName,BaiduJobService::class.java.name))
                //.setPeriodic(AlarmManager.INTERVAL_FIFTEEN_MINUTES)
                .setOverrideDeadline(60000)
                .setPersisted(true)
                .build()
        jobScheler.schedule(jobinfo)
    }

baidujobservice

class BaiduJobService : JobService() {
    val TAG = "BaiduJobService"
    override fun onStartJob(params: JobParameters?): Boolean {
        Log.d(TAG,"BaiduJobService onStartJob")
        return true
    }
    override fun onStopJob(params: JobParameters?): Boolean {
        return false
    }
}

当我使用setPeriodic(AlarmManager.INTERVAL_FIFTEEN_MINUTES)时。onStartJob尚未调用。

当我使用setOverrideDeadline(60000)时。onStartJob首先仅显示一次。

但是，时间到了，BaiduJobService似乎没有调用。

我错过了什么吗？预先感谢。

Answer 1

我正在使用警报管理器来保持服务的活力，这比作业调度程序更好。我在Service OnCreate((方法中实现此代码。

public class CallService extends Service {
        @Override
        public void onCreate() {
            super.onCreate();
            Intent intent = new Intent(this, RestartServiceBroadcast.class);
            mKeepAlivePendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
            ((AlarmManager) this.getSystemService(Context.ALARM_SERVICE)).setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + 60000, 60000, mKeepAlivePendingIntent);
        }
    }

创建Broadcastreceiver在OnRecieve

中再次致电服务

public class RestartServiceBroadcast extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals("service.RestartService")) {
        // Here Call a Service
    }
    }
}

像这样的表现

 <receiver
                android:name=".service.receiver.RestartServiceBroadcast"
                android:enabled="true"
                android:exported="true"
                android:process=":sipStack">
                <intent-filter>
                    <action android:name="service.RestartService" />
                </intent-filter>
   </receiver>
        <service
            android:name=".service.CallService"
            android:enabled="true"
            android:exported="false"
            android:stopWithTask="false">
        </service>