WeatherActivity.java

package com.mycompany.myfirstapp.activity.weather;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import java.io.IOException;

import com.mycompany.myfirstapp.service.WeatherInfoService;
import com.mycompany.myfirstapp.model.weather.WeatherInfo;

import retrofit.Callback;
import retrofit.Response;

public class WeatherActivity extends AppCompatActivity {

    // This will hold our WeatherInfoService instance.
    private WeatherInfoService weatherInfoService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
      // onCreate logic...
      // Initialize our service instance.
      weatherInfoService = new WeatherInfoService();
    }

    private void getWeatherForName(String name) {
        try {
            weatherInfoService.getWeatherForName(name, new Callback() {
                // This is executed when the request goes well :)
                @Override
                public void onResponse(Response response) {
                    // response.body holds the response, mapped to our model.
                    WeatherInfo weatherInfo = (WeatherInfo) response.body();
                    // Do something with weatherInfo, like
                    // String description = weatherInfo.getWeather()[0].getDescription();
                    // which will be something like "Sky is Clear".
                }
                
                // This one's called when it goes bad :(
                @Override
                public void onFailure(Throwable t) {
                  // Tell the user there was an error.
                }
            });
        } catch (IOException e) {
            // Recover from failure.
        }
    }

    private void getWeatherForCoords(double lat, double lon) {
        try {
            weatherInfoService.getWeatherForCoords(lat, lon, new Callback() {
                @Override
                public void onResponse(Response response) {
                    // here, too, response.body holds the response, mapped to our model.
                    WeatherInfo weatherInfo = (WeatherInfo) response.body();
                    // Do something with it. Or not. But that would be weird.
                }

                @Override
                public void onFailure(Throwable t) {
                  // Tell the user something went wrong.
                }
            });
        } catch (IOException e) {
          // Recover from failure!
        }
    }
}