Apps Problems in extending from ListView

[vidhu.0007]

Hi All,

I want to create my own Mylist_view by extending from ListView and implementing its methods. My code is not running properly.
The MyList class goes like this:

public class MyList extends ListView{

    private Paint marginPaint;
    private Paint linePaint;
    int paperColor;
    private float margin;
    
    public MyList(Context context) {
        super(context);
        init();
        // TODO Auto-generated constructor stub
    }
    public MyList(Context context, AttributeSet atts,int ds)
    {
        super(context,atts,ds);
    init();
    }
    
    public MyList(Context context, AttributeSet atts)
    {
        super(context,atts);
        init();
    }
    
    
    private void init()
    {
    final Resources myResources=getResources();
    
    marginPaint=new Paint(Paint.ANTI_ALIAS_FLAG);
    marginPaint.setColor(myResources.getColor(R.color.notepad_margin));
    linePaint=new Paint(Paint.ANTI_ALIAS_FLAG);
    linePaint.setColor(myResources.getColor(R.color.notepad_lines));
    paperColor=myResources.getColor(R.color.notepad_paper);
    margin=myResources.getDimension(R.dimen.notepad_margin);
    }
    
    //draw the back ground screen
    public void onDraw(Canvas canvas)
    {
        
    canvas.drawColor(paperColor);
    canvas.drawLine(0, 0, getMeasuredHeight(), 0, linePaint);
    canvas.drawLine(0, getMeasuredHeight(), getMeasuredWidth(), getMeasuredHeight(), linePaint);
    canvas.drawLine(margin,0, margin, getMeasuredHeight(),  marginPaint);
    
    canvas.save();
    canvas.translate(margin, 0);
    
    super.onDraw(canvas);
    canvas.restore();
        
    }

My Activity class goes like this:

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);
        final EditText myEditText= (EditText) findViewById(R.id.myEditText);
        ListView myListView= (ListView)findViewById(R.id.myListView);
     int resId=R.layout.mylist_item;
        
        final ArrayList<String> items=new ArrayList<String>();
        final ArrayAdapter<String> aa=new ArrayAdapter<String>(this,resId,items);
        
     myListView.setAdapter(aa);
     
     myEditText.setOnKeyListener(new OnKeyListener(){

        public boolean onKey(View v, int keyCode, KeyEvent event) {
            // TODO Auto-generated method stub
            if(event.getAction()==KeyEvent.ACTION_DOWN)
            {
            //    if(keyCode==KeyEvent.KEYCODE_DPAD_CENTER)
                //{
                    items.add(0, myEditText.getText().toString());
                    aa.notifyDataSetChanged();
                    myEditText.setText("");
                    return true;
                //}
            }
            return false;
        }
         
     }); }}

The resources mylist_item.xml is below:

<?xml version="1.0" encoding="UTF-8"?>
<com.todolist.MyList
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textColor="@color/notepad_text"
/>

I tried debugging the above code. The "EditText" resource is loading properly. But when I click on the down arrow key, mylist_item is loaded, i.e. MyList constructor is called. But after it executes the MyList::init() method, the application is terminated. It never reaches the Mylist:OnDraw(Canvas) method.

I am new to android. Cant figure out why it is not executing completely. Maybe I need to implement some more methods of ListView class.

Please help.