SensorIntentService.java

    private void refreshWidget() {
        final Context mContext = this;
        WeatherService weatherService = WeatherService.retrofit.create(WeatherService.class);
        final Call<JsonObject> call = weatherService.loadData();

        call.enqueue(new Callback<JsonObject>() {
            @Override
            public void onResponse(@NonNull Call<JsonObject> call, @NonNull Response<JsonObject> response) {

                JsonObject body = response.body();
                if (body != null) {
                    Sensor sensor = createSensorsFromJsonObject(body);

                    if (sensor != null) {
                        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(mContext);
                        int[] widgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(mContext, SensorWidgetProvider.class));
                        SensorWidgetProvider.updateSensorWidgets(mContext, appWidgetManager, sensor, widgetIds);
                    }
                }
            }

            @Override
            public void onFailure(@NonNull Call<JsonObject> call, @NonNull Throwable t) {
                Log.e("LOAD_DATA", t.getLocalizedMessage());
                Toast.makeText(mContext, R.string.connection_error, Toast.LENGTH_LONG).show();
            }
        });
    }