在Android的BroadcastReceiver中使用JobService

Question

我需要在后台从Web Service获取信息，并且此过程必须以指定的间隔重复（例如，每3个小时）。 我使用BroadcastReceiver来确保我有互联网连接。

public class NetworkChangeReceiver extends BroadcastReceiver {
private Context mContext;
private JobScheduler mJobScheduler;

@Override
public void onReceive(final Context context, final Intent intent) {
    try {

        boolean isVisible = AppController.isActivityVisible();// Check if
        Log.i("Activity is Visible ", "Is activity visible : " + isVisible);

        // If it is visible then trigger the task else do nothing

        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connectivityManager
                .getActiveNetworkInfo();

        // Check internet connection and accrding to state change the
        // text of activity by calling method
        if (networkInfo != null && networkInfo.isConnected()) {
            mContext = context;
            mJobScheduler = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
            JobInfo.Builder builder = new JobInfo.Builder(1,
                    new ComponentName(MainActivity.PACKAGE_NAME, Job.class.getName()));

            builder.setPeriodic(3000);
            builder.build();
            if (mJobScheduler.schedule(builder.build()) == JobScheduler.RESULT_FAILURE) {
                Log.i("mJobScheduler", "If something goes wrong ");
            }
        } else {
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

}}

这是我的JobService类：

public class Job extends JobService {
private static final String TAG = "SyncService";
@Override
public boolean onStartJob(JobParameters params) {
    // fake work
    Log.i(TAG, "on start job: " + params.getJobId());
    return true;
}
@Override
public boolean onStopJob(JobParameters params) {

    Log.i(TAG, "on start job: " + params.getJobId());
    return true;
}

}

和Manifest：

    <uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
        <service
        android:name=".Job"
        android:exported="true"
        android:permission="android.permission.BIND_JOB_SERVICE" />

    <receiver
        android:name=".NetworkChangeReceiver"
        android:enabled="true">
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
            <action android:name="android.net.wifi.STATE_CHANGE" />
        </intent-filter>
    </receiver>

没有错误。 NetworkChangeReceiver类也得到了很好的处理，但Job类没有运行。