Android Rest call with RetroFIT

AndroidRESTTEST

//CALLL
SectionsResponse response= new SectionsResponse();
		response.getSections(new Callback<Platforms>() {
			
			@Override
			public void success(Platforms arg0, Response arg1) {
				Log.i("Result", arg0.getTotal_items()+"");
				Toast.makeText(getBaseContext(), "HELLYEAH",Toast.LENGTH_LONG).show();
			}
			
			@Override
			public void failure(RetrofitError arg0) {
				Toast.makeText(getBaseContext(), "OHNOES",Toast.LENGTH_LONG).show();
			}
		});

APIHandler.java

package com.coffeearmy.softtest.rest;

import retrofit.RestAdapter;

public  class APIHandler {
	
	private static final String API_URL = "http://api2.softonic.com";
	private static  RestAdapter restAdapter;

	public APIHandler() {}
	
	private static  RestAdapter getRestAdapter(){
		if(restAdapter==null){
			restAdapter = new RestAdapter.Builder()
	        .setEndpoint(API_URL)
	        .build();
		}
		return restAdapter;
	}
	
	public static SoftonicAPI getApiInterface(){
		
		// Create an instance of our  API interface.
		SoftonicAPI sfAPI=null;
		try {
			if(restAdapter==null){
				restAdapter=getRestAdapter();
			}
			sfAPI = restAdapter.create(SoftonicAPI.class);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return sfAPI;
	}

}

APIInterface.java

public interface SoftonicAPI {
	  public enum Instance{
		  es, en, de, fr, it, br, pl, nl, jp, zh,
	  }
	  public enum Format{
		  xml,json
	  }
	//http://api2.softonic.com/en/section_getPlatforms/2.json?key=API_KEY&results=2
	@GET("/{instance}/section_getPlatforms/2.{format}")
	void getSection(@Path("instance") Instance instance,
			@Path("format") Format format,
			@Query("key") String API_KEY,
			Callback<Platforms> callback);
}

CallAPI.java

public class SectionsResponse {

	private static final String API_KEY = ":D";
	private Instance mInstance;
	private Format mFormat;

	public SectionsResponse() {
		// Default Value
		mInstance = SoftonicAPI.Instance.en;
		mFormat = SoftonicAPI.Format.json;
	}

	public void getSections(Callback<Platforms> callback) {

		// Create an instance of our API interface.
		SoftonicAPI responseAPI = APIHandler.getApiInterface();
		// Fetch and print a list of the contributors to this library.
		responseAPI.getSection(mInstance, mFormat, API_KEY, callback);

	}
}