XML READER

MainActivity.java
=======================
package com.example.myxml;

import android.annotation.SuppressLint;
import android.content.Context;
import android.os.AsyncTask;
import android.provider.DocumentsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

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

public class MainActivity extends AppCompatActivity {
    //declate a collection of currencies, to hold each currency data
    private List<ClsCur> myCurList;
    //declare of xmlString which will get our string from the internet
    String xmlString="";
    //our beloved context
    Context context;
    //declare of list view in xml
    ListView myListView;
    public final String bankURL="https://www.boi.org.il/currency.xml";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setPointer();
        readXML();
    }

    @SuppressLint("StaticFieldLeak")
    private void readXML() {
        xmlString="";
        //we next ever never using void , we need to use Void
       new AsyncTask<Void,Void,String>(){
            @Override
            protected String doInBackground(Void... voids) {
                //we need to open HTTP URL connection to our desired URL (www.boi.org.il)
                HttpURLConnection connection = null;
                try {
                    connection = (HttpURLConnection) new URL(bankURL).openConnection();
                    BufferedReader buf = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                    String line;
                    while ((line=buf.readLine())!=null){
                        xmlString+=line;
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return xmlString;
            }

            @Override
            protected void onPostExecute(String s) {
                //Log.e("XML", "onPostExecute: "+s);
                parseXML(s);
            }
        }.execute();
    }

    private void parseXML(String xmlData) {
        //we will create a document builder that will allow us an easier access to our XML String
        DocumentBuilder builder;

        try {
            builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
            Document DOM = builder.parse(new InputSource(new StringReader(xmlData)));

            //our xml structure
            NodeList itemName = DOM.getElementsByTagName("NAME");
            NodeList itemUnit = DOM.getElementsByTagName("UNIT");
            NodeList itemCode = DOM.getElementsByTagName("CURRENCYCODE");
            NodeList itemCountry = DOM.getElementsByTagName("COUNTRY");
            NodeList itemRate = DOM.getElementsByTagName("RATE");
            NodeList itemChange = DOM.getElementsByTagName("CHANGE");

            //let got on our entire collection to get the data
            for (int index=0;index<itemName.getLength();index++){
                myCurList.add(new ClsCur(
                        itemName.item(index).getTextContent(),
                        Integer.parseInt(itemUnit.item(index).getTextContent()),
                        itemCode.item(index).getTextContent(),
                        itemCountry.item(index).getTextContent(),
                        Float.parseFloat(itemRate.item(index).getTextContent()),
                        Float.parseFloat(itemChange.item(index).getTextContent())
                ));
            }
            /*
            for (ClsCur item:myCurList){
                Log.e("cur", "parseXML: "+item.getCurrencyCode()+" "+item.getRate() );
            }
            */
            //create adapter and assign it to the list view
            CurAdapter adapter = new CurAdapter(context,myCurList);
            myListView.setAdapter(adapter);
        } catch (ParserConfigurationException | SAXException | IOException e) {
            e.printStackTrace();
        }

    }

    private void setPointer() {
        this.context=this;
        myCurList = new ArrayList<>();
        myListView=findViewById(R.id.lstCur);
    }
}


activity_main.xml
==================
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="32sp"
        android:text="Current Currencies"
        android:gravity="center"
        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="3dp"
        android:background="#000"
        />
    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/lstCur"/>
</LinearLayout>


CurAdapter.java
==================
package com.example.myxml;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class CurAdapter extends BaseAdapter {
    Context context;
    List<ClsCur> myCurList;

    public CurAdapter(Context context, List<ClsCur> myCurList) {
        this.context = context;
        this.myCurList = myCurList;
    }

    @Override
    public int getCount() {
        return myCurList.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @SuppressLint("SetTextI18n")
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View myView = LayoutInflater.from(context).inflate(R.layout.cur_item,null);
        ((TextView)myView.findViewById(R.id.txtName)).setText(myCurList.get(position).getName());
        ((TextView)myView.findViewById(R.id.txtCurCode)).setText(myCurList.get(position).getCurrencyCode());
        ((TextView)myView.findViewById(R.id.txtRate)).setText(myCurList.get(position).getRate()+"");
        ((TextView)myView.findViewById(R.id.txtChange)).setText(myCurList.get(position).getChange()+"");
        ((TextView)myView.findViewById(R.id.txtChange)).setTextColor(myCurList.get(position).getRate()>0? Color.RED:Color.GREEN);
        return myView;
    }
}


cur_item.xml
================
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="MOCK DATA"
        android:layout_marginBottom="10dp"
        android:layout_weight="1"
        android:id="@+id/txtName"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="MOCK DATA"
        android:layout_marginBottom="10dp"
        android:layout_weight="1"
        android:id="@+id/txtCurCode"/>
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="MOCK DATA"
        android:layout_marginBottom="10dp"
        android:layout_weight="1"
        android:id="@+id/txtRate"/>
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="MOCK DATA"
        android:layout_marginBottom="10dp"
        android:layout_weight="1"
        android:id="@+id/txtChange"/>
</LinearLayout>



ClsCur.java
================
package com.example.myxml;

public class ClsCur {
    String name;
    int unit;
    String currencyCode;
    String country;
    float rate;
    float change;

    public ClsCur(String name, int unit, String currencyCode, String country, float rate, float change) {
        this.name = name;
        this.unit = unit;
        this.currencyCode = currencyCode;
        this.country = country;
        this.rate = rate;
        this.change = change;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getUnit() {
        return unit;
    }

    public void setUnit(int unit) {
        this.unit = unit;
    }

    public String getCurrencyCode() {
        return currencyCode;
    }

    public void setCurrencyCode(String currencyCode) {
        this.currencyCode = currencyCode;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public float getRate() {
        return rate;
    }

    public void setRate(float rate) {
        this.rate = rate;
    }

    public float getChange() {
        return change;
    }

    public void setChange(float change) {
        this.change = change;
    }
}