root/trunk/Todo_List/src/com/paad/todolist/ToDoList.java

package com.paad.todolist;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class ToDoList extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        ListView myListView = (ListView)findViewById(R.id.myListView);
        final EditText myEditText = (EditText)findViewById(R.id.myEditText);
        
        final ArrayList<String> todoItems = new ArrayList<String>();
        final ArrayAdapter<String> aa;
        aa = new ArrayAdapter<String>(
                                                                this,
                                                                android.R.layout.simple_list_item_1,
                                                                todoItems
                                                                );
        myListView.setAdapter(aa);
        
        myEditText.setOnKeyListener(new OnKeyListener(){                
                public boolean onKey(View v,int keyCode,KeyEvent event){
                        if (event.getAction() == KeyEvent.ACTION_DOWN)
                        if(keyCode==KeyEvent.KEYCODE_DPAD_CENTER){
                                todoItems.add(0,myEditText.getText().toString());
                                aa.notifyDataSetChanged();
                                myEditText.setText("");
                                return true;
                        }
                        return false;
                }
        });
    }
}