Workmanager（定期）获取位置并上传数据（Asynctask）被杀死
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【中文标题】Workmanager（定期）获取位置并上传数据（Asynctask）被杀死【英文标题】：Workmanager (periodic) get location and upload data (Asynctask ) get killed 【发布时间】：2019-12-02 12:21:53 【问题描述】：当手机处于睡眠模式时，Workmanager 不会将坐标发送到我的服务器。异步任务被杀死？
我使用 Workmanager (PeriodicWorkRequest) 每 15 分钟获取一次坐标。要获取坐标，我使用 FusedLocationClient。这很好......但我也想将它们发送到我的服务器。
如果我开始发送“public void onComplete”（参见代码），我必须使用 AsyncTask（其他解决方案？？）。当我的手机未处于睡眠模式时，它可以工作。目的是发送继续运行。我该如何解决这个问题（新手，例子让我很高兴:)）
MainActivity 启动 Workmanager
public static void scheduleWork(String tag)
PeriodicWorkRequest.Builder SendLocation =
new PeriodicWorkRequest.Builder(LocationWorker.class, 15,
TimeUnit.MINUTES);
PeriodicWorkRequest locationCheckWork = SendLocation.build();
WorkManager instance = WorkManager.getInstance();
instance.enqueueUniquePeriodicWork(tag, ExistingPeriodicWorkPolicy.KEEP , locationCheckWork);
LocationWorker
@NonNull
@Override
public Result doWork()
Log.d(TAG, "onStartJob: STARTING JOB..");
mFusedLocationClient = LocationServices.getFusedLocationProviderClient(mContext);
mLocationCallback = new LocationCallback()
@Override
public void onLocationResult(LocationResult locationResult)
super.onLocationResult(locationResult);
;
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
try
mFusedLocationClient
.getLastLocation()
.addOnCompleteListener(new OnCompleteListener<Location>()
@Override
public void onComplete(@NonNull Task<Location> task)
if (task.isSuccessful() && task.getResult() != null)
mLocation = task.getResult();
Log.d(TAG, "Location : " + mLocation);
double latitude = mLocation.getLatitude();
double longitude = mLocation.getLongitude();
// SEND TO SERVER
AsyncTask.execute(new Runnable()
@Override
public void run()
HttpURLConnection connection;
try
//Open a new URL connection
connection = (HttpURLConnection) new URL(myurl)
.openConnection();
//Defines a HTTP request type
connection.setRequestMethod("POST");
//Sets headers: Content-Type, Authorization
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Accept", "application/json");
connection.setRequestProperty("Authorization", "Token fab11c9b6bd4215a989c5bf57eb678");
String userid= Prefs.getUserid(getApplicationContext());
String compid= Prefs.getCompid(getApplicationContext());
//Add POST data in JSON format
JSONObject jsonParam = new JSONObject();
try
jsonParam.put("latitude", latitude);
jsonParam.put("longitude", longitude);
jsonParam.put("userid", userid);
jsonParam.put("compid", compid);
catch (JSONException e)
e.printStackTrace();
//Create a writer object and make the request
OutputStreamWriter outputStream = new OutputStreamWriter(connection.getOutputStream());
outputStream.write(jsonParam.toString());
outputStream.flush();
outputStream.close();
//Get the Response code for the request
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String responseBody = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N)
responseBody = br.lines().collect(Collectors.joining());
Log.i(TAG, "responseBody: "+responseBody);
//return connection.getResponseCode();
catch (IOException e)
e.printStackTrace();
);
mFusedLocationClient.removeLocationUpdates(mLocationCallback);
else
Log.w(TAG, "Failed to get location.");
);
catch (SecurityException unlikely)
Log.e(TAG, "Lost location permission." + unlikely);
try
mFusedLocationClient.requestLocationUpdates(mLocationRequest, null);
catch (SecurityException unlikely)
//Utils.setRequestingLocationUpdates(this, false);
Log.e(TAG, "Lost location permission. Could not request updates. " + unlikely);
return Result.SUCCESS;
【问题讨论】：
如果它仅在睡眠模式下不起作用，您确定它与应用程序进入睡眠以节省电池的 Android 打盹模式无关。尝试在您的设备上为您的应用关闭电池优化，看看您是否遇到同样的问题 【参考方案1】：PeriodicWorkRequests 在打盹模式下会被延迟。您的工作不保证每 15 分钟运行一次。 JobScheduler 可以决定它想在维护间隔期间运行您的工作。
【讨论】：
【参考方案2】：您正在使用同步 Worker 执行异步操作。如果您打算等待回调在您的工作人员中执行某些操作，则需要使用 ListenableWorker：https://developer.android.com/topic/libraries/architecture/workmanager/advanced/threading
【讨论】：
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