to-do list 2

[code]
package com.paad.todolist;

import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class ToDoList extends Activity {
    
static final private int ADD_NEW_TODO = Menu.FIRST;
static final private int REMOVE_TODO = Menu.FIRST + 1;

private boolean addingNew = false;
private ArrayList<String> todoItems;
private ListView myListView;
private EditText myEditText;
private ArrayAdapter<String> aa;

/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Inflate your view
    setContentView(R.layout.main);
    
    // Get references to UI widgets
    myListView = (ListView)findViewById(R.id.myListView);
    myEditText = (EditText)findViewById(R.id.myEditText);

    todoItems = new ArrayList<String>();
    
    int resID = R.layout.todolist_item;
    aa = new ArrayAdapter<String>(this, resID, 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());
            myEditText.setText("");
            aa.notifyDataSetChanged();
            cancelAdd();
            return true;
         }
        return false;
     }
    });
    
    registerForContextMenu(myListView);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);

    // Create and add new menu items.
    MenuItem itemAdd = menu.add(0, ADD_NEW_TODO, Menu.NONE,
                                R.string.add_new);
    MenuItem itemRem = menu.add(0, REMOVE_TODO, Menu.NONE,
                                R.string.remove);

    // Assign icons
    itemAdd.setIcon(R.drawable.add_new_item);
    itemRem.setIcon(R.drawable.remove_item);

    // Allocate shortcuts to each of them.
    itemAdd.setShortcut('0', 'a');
    itemRem.setShortcut('1', 'r');

    return true;
}

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    super.onPrepareOptionsMenu(menu);

    int idx = myListView.getSelectedItemPosition();

    String removeTitle = getString(addingNew ?
                                 R.string.cancel : R.string.remove);

    MenuItem removeItem = menu.findItem(REMOVE_TODO);
    removeItem.setTitle(removeTitle);
    removeItem.setVisible(addingNew || idx > -1);

    return true;
}

@Override
public void onCreateContextMenu(ContextMenu menu,
                                 View v,
                                 ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    menu.setHeaderTitle("Selected To Do Item");
    menu.add(0, REMOVE_TODO, Menu.NONE, R.string.remove);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    super.onOptionsItemSelected(item);

    int index = myListView.getSelectedItemPosition();

    switch (item.getItemId()) {
     case (REMOVE_TODO): {
        if (addingNew) {
         cancelAdd();
        }
        else {
         removeItem(index);
        }
        return true;
     }
     case (ADD_NEW_TODO): {
        addNewItem();
        return true;
     }
    }

    return false;
}

@Override
public boolean onContextItemSelected(MenuItem item) {
    super.onContextItemSelected(item);
    switch (item.getItemId()) {
     case (REMOVE_TODO): {
        AdapterView.AdapterContextMenuInfo menuInfo;
        menuInfo =(AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
        int index = menuInfo.position;

        removeItem(index);
        return true;
     }
    }
    return false;
}

private void cancelAdd() {
    addingNew = false;
    myEditText.setVisibility(View.GONE);
}

private void addNewItem() {
    addingNew = true;
    myEditText.setVisibility(View.VISIBLE);
    myEditText.requestFocus();
}

private void removeItem(int _index) {
    todoItems.remove(_index);
    aa.notifyDataSetChanged();
}
}
[/code]