Esto funciona para mi
Definir el permiso de Internet
<uses-permission android:name="android.permission.INTERNET" >
Agregar dependencia
compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.google.code.gson:gson:2.6.2'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
compile 'com.google.code.gson:gson:2.6.2'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
compile 'com.squareup.okhttp3:okhttp:3.4.1'
compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile ('com.squareup.retrofit2:converter-simplexml:2.1.0'){
exclude group: 'stax', module: 'stax-api'
exclude group: 'stax', module: 'stax'
exclude group: 'xpp3', module: 'xpp3'
}
En actividad principal
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.simplexml.SimpleXmlConverterFactory;
public class MainActivity extends AppCompatActivity {
private BreakfastMenu breakfastMenu;
List<BreakfastMenu> list;
TextView responseText;
APIInterface apiInterface;
String name;
String price;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
responseText=(TextView)findViewById(R.id.reponseText);
apiInterface = APIClient.getClient().create(APIInterface.class);
/**
GET List Resources
**/
Call<BreakfastMenu> call = apiInterface.getBreakfastMenu();
call.enqueue(new Callback<BreakfastMenu>() {
@Override
public void onResponse(Call<BreakfastMenu> call, Response<BreakfastMenu> response) {
Log.d("TAG", response.code() + "");
String displayResponse = "";
BreakfastMenu resource = response.body();
System.out.println(displayResponse+"display response ");
for (Food food : resource.getFoodList())
{
name=food.getName();
price=food.getPrice();
System.out.println(name+price+"=========================================");
displayResponse += food.getName() + " " + food.getPrice()+"\n"+"\n";
Toast.makeText(MainActivity.this,name+price,Toast.LENGTH_LONG).show();
}
responseText.setText(displayResponse);
}
@Override
public void onFailure(Call<BreakfastMenu> call, Throwable t) {
call.cancel();
}
});
}
}
Hacer clase APIClient.java
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
import retrofit2.converter.simplexml.SimpleXmlConverterFactory;
class APIClient {
private static Retrofit retrofit = null;
static Retrofit getClient() {
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();
retrofit = new Retrofit.Builder()
.baseUrl("https://www.w3schools.com/")
.addConverterFactory(SimpleXmlConverterFactory.create())
.build();
return retrofit;
}
}
enter code here
Make APIInterface.java
import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.Field;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.GET;
import retrofit2.http.Headers;
import retrofit2.http.POST;
import retrofit2.http.Query;
interface APIInterface {
@GET("xml/simple.xml")
@Headers({"Accept: application/xml",
"User-Agent: Retrofit-Sample-App"})
Call<BreakfastMenu> getBreakfastMenu();
}
In BreakfastMenu.java
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;
import java.util.List;
@Root(name = "breakfast_menu")
public class BreakfastMenu
{
@ElementList(inline = true)
private List<Food> foodList;
public BreakfastMenu()
{
}
public List<Food> getFoodList()
{
return foodList;
}
public void setFoodList(List<Food> foodList)
{
this.foodList = foodList;
}
}
Hacer Food.java
import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;
@Root(name = "food")
public class Food
{
@Element(name = "name")
private String name;
@Element(name = "price")
private String price;
@Element(name = "description")
private String description;
@Element(name = "calories")
private String calories;
public Food()
{
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getPrice()
{
return price;
}
public void setPrice(String price)
{
this.price = price;
}
public String getDescription()
{
return description;
}
public void setDescription(String description)
{
this.description = description;
}
public String getCalories()
{
return calories;
}
public void setCalories(String calories)
{
this.calories = calories;
}
}
En activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="@+id/reponseText"
android:layout_width="match_parent"
android:layout_height="600dp"
/>
</Linear Layout>