无法从WorkManager调用位置 [英] Location not getting called from WorkManager

问题描述

我正在使用工作管理器启动位置服务，它每隔 15分钟就会加载 doWork()方法，但是不执行 onLocationChanged .

I am using work manager to start location services, it loads doWork() method after every 15 minutes, but does not execute onLocationChanged.

在我使用Job Scheduler之前，它工作得很好.

Before i was using Job Scheduler, and it was working just fine.

如果我在15分钟后显示来自工作管理器的通知，则以下代码也可以正常工作.

The following code also works fine, if i display notification from Work Manager after 15 minutes.

这是我的代码.

   public class LocationWorker extends Worker implements LocationListener, GoogleApiClient.ConnectionCallbacks,
    GoogleApiClient.OnConnectionFailedListener{


        private static final long BACKGROUND_INTERVAL = 1000 * 60 * 60;
        final private String TAG = LocationUpdateService.class.getSimpleName();
        LocationRequest mLocationRequest;
        GoogleApiClient mGoogleApiClient;



 @NonNull
    @Override
    public Result doWork() {


        if (isGooglePlayServicesAvailable()) {
            mGoogleApiClient = new GoogleApiClient.Builder(GlobalApplication.getAppContext())
                    .addApi(LocationServices.API)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .build();

            mGoogleApiClient.connect();
            jwtToken = getJWTToken();
        }


        mLocationRequest = new LocationRequest();
        mLocationRequest.setInterval(BACKGROUND_INTERVAL);
        mLocationRequest.setFastestInterval(BACKGROUND_INTERVAL);
        mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

        return null;
    }



@Override
    public void onLocationChanged(Location location) {


        String storedLat, storedLng;
        //...

}

推荐答案

此代码有一些错误之处:

There are a few things that are wrong with this code:

1. 从总体上讲，您正在使用一个同步的Worker来执行异步(基于回调)的代码.这行不通.请阅读 https://developer.android.com/topic/libraries/体系结构/工作管理器/高级/线程处理(尤其要注意ListenableWorker，这是您要使用的类).

1. At a high level, you are using a Worker - which is synchronous - to execute an asynchronous (callback-based) piece of code. This won't work. Please read https://developer.android.com/topic/libraries/architecture/workmanager/advanced/threading (and in particular, pay attention to ListenableWorker - that's the class you want to use).

您正在从@NonNull方法返回null.WorkManager将立即将此工作视为失败.返回正确的值.

You are returning null from a @NonNull method. WorkManager will immediately treat this work as failed. Return a proper value.

您的位置间隔设置为一个小时.工人们最多可以执行10分钟，因此这也不起作用.FWIW，我真的很怀疑这段代码是否与JobScheduler一起正常工作.它也有一个10分钟的执行窗口.

Your location interval is set for an hour. Workers can execute for a maximum of 10 minutes, so this won't work either. FWIW, I really doubt this code was working properly with JobScheduler; it too has a 10 minute execution window.

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