Android 7服务gpsupdate

Question

我有一个用于android7的java服务类，它应该提交设备的GPS位置。见下文。

我遇到的问题是Android Studio抛出了一个异常，比如“任务还没有完成”。

我还尝试将其作为单独的线程运行。

如何解决这个问题？

protected void getLocation() {
    // Create the location request to start receiving updates
    mLocationRequest = new LocationRequest();
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    mLocationRequest.setInterval(UPDATE_INTERVAL);
    mLocationRequest.setFastestInterval(FASTEST_INTERVAL);

    // Create LocationSettingsRequest object using location request
    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
    builder.addLocationRequest(mLocationRequest);
    LocationSettingsRequest locationSettingsRequest = builder.build();

    // Check whether location settings are satisfied
    // https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient
    SettingsClient settingsClient = LocationServices.getSettingsClient(this);
    settingsClient.checkLocationSettings(locationSettingsRequest);

    // new Google API SDK v11 uses getFusedLocationProviderClient(this)
    fusedLocationClient = getFusedLocationProviderClient(this);

    // Approach 1
    setGpsLocation(fusedLocationClient);

    // Approach 2
    new Thread(new Runnable() {
        @Override
        public void run() {
            try {
                setGpsLocation(fusedLocationClient);
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }).start();

}

private void setGpsLocation(FusedLocationProviderClient f) {
    Location location = f.getLastLocation().getResult();

    StringBuilder sb = new StringBuilder();
    sb.append("<Data>");
    sb.append(" <UserId>" + userId + "</UserId>");
    sb.append(" <Type>GpsLocation</Type>");
    sb.append(" <Longitude>" + location.getLongitude() + "</Longitude>");
    sb.append(" <Latitude>" + location.getLatitude() + "</Latitude>");
    sb.append(" <DateTime>" + sdf.format(new Date()) + "</DateTime>");
    sb.append("</Data>");

}

}

Answer 1

getLastLocation()方法返回一个任务对象。Task对象表示异步操作(通常是获取某个值的操作，在本例中是Location对象)。您可以从location对象中检索位置的纬度和经度。在极少数情况下，当位置不可用时，location对象为null。

Task类提供了用于添加成功和失败侦听器的方法。如果操作成功，成功的监听器将传递所需的对象。如果操作不成功，则失败监听器将传递异常。

mFusedLocationClient.getLastLocation().addOnSuccessListener(
       new OnSuccessListener<Location>() {
           @Override
           public void onSuccess(Location location) {
               if (location != null) {
                   mLastLocation = location;
               } 
           }
       });

mFusedLocationClient.getLastLocation().addOnFailureListener(
       new OnFailureListener() {
           @Override
           public void onFailure(@NonNull Exception e) {
               Log.e(TAG, "onFailure: ", e.printStackTrace());

           }
       }
);