Android and ArrayList (Java)

package com.myapp;

import java.util.ArrayList;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {

	ArrayAdapter<String> adapter;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
 
        /**** Sample 1 ****/ 
        ArrayList<String> myArrList = new ArrayList<String>();
        myArrList.add("Belgium");
        myArrList.add("France");
        myArrList.add("Italy");
        myArrList.add("Germany");
        
        // Get Size ArrayList
        final TextView txtView1 = (TextView)findViewById(R.id.textView1); 
        txtView1.setText("ArrayList Size = " + myArrList.size());
        
        // Loop Data ArrayList
        final TextView txtView2 = (TextView)findViewById(R.id.textView2); 
        txtView2.setText("");
        for (int i = 0; i < myArrList.size(); i++) {
        	// myArrList.get(i))
        	txtView2.setText(txtView2.getText() + myArrList.get(i) + ",");
		}
        
        // Loop Sample
    	//for (String temp : myArrList) {
    		// txtView2.setText(temp);
		//}
        
        // Convert ArrayList to Array
		String[] myArr = {};
		myArr = myArrList.toArray(new String[myArrList.size()]);
		
		// Show Array to ListView
        final ListView lView = (ListView)findViewById(R.id.listView1); 
        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, myArr);
        lView.setAdapter(adapter);
        
    }
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
	
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="22dp"
        android:text="TextView" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="20dp"
        android:text="TextView" />
    


    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_marginTop="250dp" >

    </ListView>

</RelativeLayout>