retrofit.java

package com.mydietitian.android.activities;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import retrofit.Callback;
import retrofit.RestAdapter;
import retrofit.RetrofitError;
import retrofit.client.Response;
import retrofit.http.GET;

public class RetrofitActivity extends Activity {
    String TAG = "RetrofitActivity";

    JsonEchoService service;
    JsonMock js;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        RestAdapter restAdapter = new RestAdapter.Builder()
                .setServer("http://echo.jsontest.com")
                .build();

        service = restAdapter.create(JsonEchoService.class);

        testJson();
    }

    private void testJson() {
        service.getJsonAsync(new Callback<JsonMock>() {
            @Override
            public void success(JsonMock jsonMock, Response response) {
                Log.i(TAG, jsonMock.toString());
                Log.i(TAG, response.toString());
            }

            @Override
            public void failure(RetrofitError retrofitError) {
                Log.i(TAG, "failed");
            }
        });
    }

    public interface JsonEchoService{
        @GET("/key/value/one/two/three/four")
        void getJsonAsync(Callback<JsonMock> callback);
    }

    public class JsonMock {
        String key;
        String one;
        String three;

        @Override
        public String toString() {
            return "JsonMock {" +
                    "key='" + key + '\'' +
                    ", one='" + one + '\'' +
                    ", three='" + three + '\'' +
                    '}';
        }
    }
}