I keep getting the error message on the emulator even though I've changed the longitude.

public class MainActivity extends AppCompatActivity {

    public static final String TAG =MainActivity.class.getSimpleName();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String apiKey = "xxxxxxxxxxxxx";
        double latitude = 37.8267 ;
        double longitude =-122.4233;
        String forecastURL = "https://api.darksky.net/forecast/"+apiKey+"/"
                + latitude +" , "+ longitude+"";


        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url(forecastURL)
                .build();
        //This is the request to get data from forecast.

        okhttp3.Call call = client.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(okhttp3.Call call, IOException e) {

            }

            @Override
            public void onResponse(okhttp3.Call call, Response response) throws IOException {

                try {Log.v(TAG, response.body().string());

                    if (response.isSuccessful()) {

                    }

                else {
                       alertUserAboutError();
                    }


            }catch (IOException e){
                Log.e(TAG, "Exception caught", e);
            }
               Log.d(TAG, "Main UI code is running!");
            }

            });
        }

public class AlertDialogFragment extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Context context = getActivity();
        AlertDialog.Builder builder = new AlertDialog.Builder(context)
                .setTitle(R.string.error_title)
                .setMessage(R.string.error_message)
                .setPositiveButton(R.string.error_ok_button_text, null);
        AlertDialog dialog = builder.create();
        return dialog;