如何使用FirebaseJobDispatcher可靠地替换CONNECTIVITY_CHANGE

Question

我的应用程序定位到Android 7，最低限度为Android Android 4。

因此，听CONNECTIVITY_CHANGE（即使应用程序被杀）也不再有效。我想做的是

1. 即使我的主应用程序被杀，当互联网连接从＆＃34;不可用时变为＆＃34; to＆＃34; available＆＃34;，我想启动一个警报广播接收器。

我尝试使用以下代码实现

MainActivity.java

@Override
public void onPause() {
    super.onPause();
    installJobService();
}

private void installJobService() {
    // Create a new dispatcher using the Google Play driver.
    FirebaseJobDispatcher dispatcher = new FirebaseJobDispatcher(new GooglePlayDriver(this));

    Job myJob = dispatcher.newJobBuilder()
            // the JobService that will be called
            .setService(MyJobService.class)
            // uniquely identifies the job
            .setTag("my-unique-tag")
            // one-off job
            .setRecurring(true)
            // persist forever
            .setLifetime(Lifetime.FOREVER)
            // start between 0 and 60 seconds from now
            .setTrigger(Trigger.executionWindow(0, 60))
            // overwrite an existing job with the same tag
            .setReplaceCurrent(true)
            // retry with exponential backoff
            .setRetryStrategy(RetryStrategy.DEFAULT_EXPONENTIAL)
            // constraints that need to be satisfied for the job to run
            .setConstraints(
                    // only run on any network
                    Constraint.ON_ANY_NETWORK
            )
            .build();

    dispatcher.mustSchedule(myJob);
}

然而，

MyJobService.java

import android.content.Context;

import com.firebase.jobdispatcher.JobParameters;
import com.firebase.jobdispatcher.JobService;

import org.yccheok.jstock.gui.JStockApplication;

/**
 * Created by yccheok on 21/5/2017.
 */

public class MyJobService extends JobService {
    @Override
    public boolean onStartJob(JobParameters jobParameters) {
        Context context = this.getApplicationContext();

        android.util.Log.i("CHEOK", "Internet -> " + Utils.isInternetAvailable(context));

        // Answers the question: "Is there still work going on?"
        return false;
    }

    @Override
    public boolean onStopJob(JobParameters jobParameters) {
        // Answers the question: "Should this job be retried?"
        return true;
    }
}

但是，上述代码并不可靠。我如何测试

1. 退出我的应用。
2. 使用＆＃34;强制停止＆＃34;。
，通过设置明确杀死我的应用
3. 关闭互联网。
4. 开启互联网。
5. 等几分钟。永远不会执行MyJobService。

有没有可靠的方法，使用FirebaseJobDispatcher可靠地替换CONNECTIVITY_CHANGE？

我经历过Firebase JobDispatcher - how does it work compared to previous APIs (JobScheduler and GcmTaskService)?，但我仍然无法找到让它可靠运行的方法。

Answer 1

不确定您是如何通过FirebaseJobDispatcher检测CONNECTIVITY_CHANGE的，但同样的情况我使用了广播

public class ConnectivityStateReceiver extends BroadcastReceiver {
String TAG = "MyApp";

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

    Intent serviceIntent = new Intent(context, NetworkService.class);

    ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (cm == null) {
        return;
    } else if (cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected()) {
        Log.e(TAG, "Connected!");
        context.startService(serviceIntent);
    } else {
        Log.e(TAG, "Not Connected!");
        context.stopService(serviceIntent);
    }
}

}