LocationSettingsRequest对话框启用GPS - 跳过onActivityResult（）

Question

我的应用程序的一部分需要位置服务，因此如果当前关闭位置，应用程序将提示用户启用它。 Here是我如何做到的:(也见于this Stack Overflow答案）

LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
            .addLocationRequest(mLocationRequest);
builder.setAlwaysShow(true);

PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());

result.setResultCallback(new ResultCallback<LocationSettingsResult>() 
{
     @Override
     public void onResult(LocationSettingsResult result) 
     {
         final Status status = result.getStatus();
         final LocationSettingsStates = result.getLocationSettingsStates();
         switch (status.getStatusCode()) 
         {
             case LocationSettingsStatusCodes.SUCCESS:
                 // All location settings are satisfied. The client can initialize location
                 // requests here.
                 ...
                 Log.d("onResult", "SUCCESS");
                 break;
             case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
                 // Location settings are not satisfied. But could be fixed by showing the user
                 // a dialog.
                 Log.d("onResult", "RESOLUTION_REQUIRED");
                 try 
                 {
                     // Show the dialog by calling startResolutionForResult(),
                     // and check the result in onActivityResult().
                     status.startResolutionForResult(OuterClass.this, REQUEST_LOCATION);
                 } 
                 catch (SendIntentException e) 
                 {
                     // Ignore the error.
                 }
                 break;
             case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
                 // Location settings are not satisfied. However, we have no way to fix the
                 // settings so we won't show the dialog.
                 ...
                 Log.d("onResult", "UNAVAILABLE");
                 break;
         }
     }
 });

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
    // This log is never called
    Log.d("onActivityResult()", Integer.toString(resultCode));

    final LocationSettingsStates states = LocationSettingsStates.fromIntent(data);
    switch (requestCode)
    {
        case REQUEST_LOCATION:
            switch (resultCode)
            {
                case Activity.RESULT_OK:
                {
                    // All required changes were successfully made
                    break;
                }
                case Activity.RESULT_CANCELED:
                {
                    // The user was asked to change settings, but chose not to
                    break;
                }
                default:
                {      
                    break;
                }
            }
            break;
    }
}

这段代码效果很好，但onActivityResult()总是被跳过。无论用户是否从Yes按No，back或Dialog，onActivityResult()都不会运行。

我需要android来调用onActivityResult()，所以如果用户选择不打开位置服务，我可以适当地处理它。

谷歌的开发者页面（以及上面的代码）明确表示应该调用onActivityResult()。任何人都知道为什么会被跳过？

我也不知道这一行的目的是什么：

final LocationSettingsStates states = LocationSettingsStates.fromIntent(data);

谢谢！

编辑：关于我的应用程序结构的基本信息：

此代码包含在onResume()的Fragment方法中，该方法实现GoogleApiClient.ConnectionCallbacks，GoogleApiClient.OnConnectionFailedListener和LocationListener以接收位置更新。例子看到here。
在onLocationChanged()，Fragment将有一个自定义的View调用invalidate()并重新绘制自己的更新信息。