Question

在获取设备上的纬度和经度位置时，我在logcat中得到null。

但是在genymotion模拟器中，如果我在genymotion模拟器的右侧打开gps，我将获得gps纬度和经度位置。

我不知道为什么我无法获得设备中的纬度和经度位置。

下面我发布了相关的代码。

logcat的：

E:/ gpsLocation: null

FragmentDiscovery.java：

 AppLocationService appLocationService;

  appLocationService = new AppLocationService(getActivity());

        submitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                getLocation();

                Log.e("GET_USER_LAT_STR", ""+GET_USER_LAT_STR );
                Log.e("GET_USER_LON_STR", ""+GET_USER_LON_STR );


                editor.putString("GetLat", GET_USER_LAT_STR);
                editor.putString("GetLon", GET_USER_LON_STR);


                editor.commit();


                Fragment fragment = new CardsFragment();

                FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.container_body, fragment);
                fragmentTransaction.addToBackStack(null);
                fragmentTransaction.commit();

            }
        });




        // Inflate the layout for this fragment
        return rootView;
    }

   void getLocation(){

       Location gpsLocation = appLocationService
               .getLocation(LocationManager.GPS_PROVIDER);

       Log.e("gpsLocation", ""+gpsLocation);

       if (gpsLocation != null) {
           double latitude = gpsLocation.getLatitude();
           double longitude = gpsLocation.getLongitude();

           GET_USER_LAT_STR = String.valueOf(latitude);
           GET_USER_LON_STR = String.valueOf(longitude);

       } else {
           showSettingsAlert("GPS");
       }

   }

    public void showSettingsAlert(String provider) {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity());

        alertDialog.setTitle(provider + " SETTINGS");

        alertDialog
                .setMessage(provider + " is not enabled! Want to go to settings menu?");

        alertDialog.setPositiveButton("Settings",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        Intent intent = new Intent(
                                Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                        getActivity().startActivity(intent);
                    }
                });

        alertDialog.setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });

        alertDialog.show();
    }

修改

在设备中它没有获得gpslocation.Instead只是在设置中显示打开gps窗口。但我已经打开gps

Answer 1

使用onLocationChanged获取更新的位置。

获取设备纬度和经度显示为null

1 个答案: