asynchrony

Forecaster.java

package com.example.michael.forecaster;

import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;


public class Forecaster {
    public void fetchForecast(int zip, Callback callback) {
        String forecastUrl = "https://api.forecast.io/forecast/cf0a68ec329b33b4189e84ce83990a97/47,122";

        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url(forecastUrl)
                .build();

        Call call = client.newCall(request);
        call.enqueue(callback);
    }
}

MainActivity.java

package com.example.michael.forecaster;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {
    EditText mZipInput;
    Button mGetForecastButton;
    TextView mForecastText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mZipInput = (EditText) findViewById(R.id.zipInput);
        mGetForecastButton = (Button) findViewById(R.id.getForecastButton);
        mForecastText = (TextView) findViewById(R.id.forecastText);

        mGetForecastButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                fetchForecast();
            }
        });
    }

    private void fetchForecast() {
        int zip = Integer.parseInt(mZipInput.getText().toString());
        final Forecaster forecaster = new Forecaster();
        forecaster.fetchForecast(zip, new Callback() {
            @Override
            public void onResponse(Response response) throws IOException {
                // handle response
                MainActivity.this.runOnUiThread(new Runnable() {
                    public void run() {
                        MainActivity.this.mForecastText.setText("rainy");
                    }
                });
            }

            @Override
            public void onFailure(Request request, IOException e) {
                // handle failure
            }
        });
    }
}