Как сделать android приложение курс валют?

import org.w3c.dom.*;

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.URL;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

public class Main {

    public static void main(String[] args){

        try {
            String pre_apiURL = "https://www.cbr-xml-daily.ru/daily_utf8.xml";
            System.out.println("url " + pre_apiURL);
            URL url = new URL(pre_apiURL);

            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(url.openStream());
            NodeList list = doc.getElementsByTagName("Valute");
            Element element = doc.getDocumentElement();

            for (int i = 0; i < list.getLength(); i++) {
                Node node = list.item(i);

                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element el = (Element) node;
                    String name1 = el.getAttribute("Name");

                    NodeList nodelist = el.getChildNodes();
                    for (int j = 0; j < nodelist.getLength(); j++) {
                        Node n = nodelist.item(j);
                        if (n.getNodeType() == Node.ELEMENT_NODE) {
                            Element name = (Element) n;
                            if (name.getTagName().equals("Name")) {
                                System.out.println(name.getTextContent());
                            }
                            if (name.getTagName().equals("Value")) {
                                System.out.println(name.getTextContent());
                            }
                        }

                    }
                }
            }



            }catch(Exception e){
            }
        }

}


Попробовала переделать под андроид и ничего не выводит объясните в чем ошибка и как исправить?
import java.net.URL;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;

import android.widget.TextView;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;



public class MainActivity extends AppCompatActivity {

   private ListView name;
   private ListView value;

    public String Name[];
    public  String Value[];

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

        ListView lvMain = (ListView) findViewById(R.id.name);
        try {
            String pre_apiURL = "https://www.cbr-xml-daily.ru/daily_utf8.xml";
            System.out.println("url " + pre_apiURL);
            URL url = new URL(pre_apiURL);

            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = dbf.newDocumentBuilder();
            Document doc = db.parse(url.openStream());
            NodeList list = doc.getElementsByTagName("Valute");
             Element element = doc.getDocumentElement();

            for (int i = 0; i < list.getLength(); i++) {
                Node node = list.item(i);

                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element el = (Element) node;
                      String name1 = el.getAttribute("Name");

                    NodeList nodelist = el.getChildNodes();
                    for (int j = 0; j < nodelist.getLength(); j++) {
                        Node n = nodelist.item(j);
                        if (n.getNodeType() == Node.ELEMENT_NODE) {
                            Element name = (Element) n;
                            if (name.getTagName().equals("Name")) {
                                Name[j]=name.getTextContent()+".";
                                ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                                        android.R.layout.simple_list_item_1, Name);
                                lvMain.setAdapter(adapter);

                            }
                            if (name.getTagName().equals("Value")) {
                                Value[j]=name.getTextContent();
                            }
                        }

                    }
                }
            }



        }catch(Exception e){
        }
    }
}