Problem with @Override in onDraw

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

public class DrawStuffActivity extends Activity implements OnTouchListener
{
	MyView myView;
	int numberOfFingers = 0; 
	float oldX[] = new float[2],
			oldY[] = new float[2];
	Rect rectangle = new Rect(0, 0, 100, 100);
	DisplayMetrics metrics = new DisplayMetrics();

	@Override
	protected void onCreate(Bundle savedInstanceState) 
	{
		super.onCreate(savedInstanceState);
		
		myView = new MyView(this);
		setContentView(myView);
		myView.setOnTouchListener(this);
		
		getWindowManager().getDefaultDisplay().getMetrics(metrics);
	}


	@Override
	public boolean onTouch(View view, MotionEvent event) 
	{
		switch (event.getActionMasked() )
		{
		case MotionEvent.ACTION_DOWN:
			numberOfFingers = 1;
			oldX[0] = event.getX(0);
			oldY[0] = event.getY(0);
			break;
		case MotionEvent.ACTION_POINTER_DOWN:
			numberOfFingers = 2;
			oldX[1] = event.getX(1);
			oldY[1] = event.getY(1);
			break; 
		case MotionEvent.ACTION_MOVE:
			handleMove(event);
			break;
		case MotionEvent.ACTION_POINTER_UP:
		case MotionEvent.ACTION_UP:
			numberOfFingers--;
			break;
		}
		
		view.invalidate();
		return true;
	}

	
	float newX[] = new float[2], newY[] = new float[2];
	int xChange[] = new int[2], yChange[] = new int[2];
	
	int diffX, diffY;
	int newLeft = rectangle.left, 
			newTop = rectangle.top, 
			newRight = rectangle.right,
			newBottom = rectangle.bottom;
	
	
	
	
	void handleMove(MotionEvent event)
	{
		newX[0] = Math.round(event.getX(0) );
		newY[0] = Math.round(event.getY(0) );
		xChange[0] = Math.round(newX[0] - oldX[0] );
		yChange[0] = Math.round(newY[0] - oldY[0] );
		oldX[0] = newX[0];
		oldY[0] = newY[0];
		
		switch (numberOfFingers)
		{
		case 1:
			newLeft = rectangle.left + xChange[0];
			newTop = rectangle.top + yChange[0];
			newRight = rectangle.right + xChange[0];
			newBottom = rectangle.bottom + yChange[0];
			
			if (newLeft < 0 || newRight > metrics.widthPixels)
			{
				newLeft = rectangle.left;
				newRight = rectangle.right;
			}
			if (newTop > 0 || newTop > metrics.heightPixels)
			{
				newTop = rectangle.top;
				newBottom = rectangle.bottom;
			}
			
			rectangle = new Rect(newLeft, newTop, newRight, newBottom);
		
			break;
			
		case 2:
			newX[1] = Math.round(event.getX(1) );
			newY[1] = Math.round(event.getY(1) );
			
			diffX = Math.abs(Math.round(newX[1] - newX[0])) - Math.abs(Math.round(oldX[1] - oldX[0]));
			diffY = Math.abs(Math.round(newY[1] - newY[0])) - Math.abs(Math.round(oldY[1] - oldY[0]));
			
			oldX[1] = newX[1];
			oldY[1] = newY[1];
			
			newLeft = rectangle.left - diffX / 2;
			newTop = rectangle.top - diffY / 2;
			newRight = rectangle.right - diffX / 2;
			newBottom = rectangle.bottom - diffY / 2;
			rectangle = new Rect(newLeft, newTop, newRight, newBottom);
			
			break;
		}
		
		
		
	}

	class MyView extends View
	{
		Paint whitePaint = new Paint();
		
		MyView(Context context)
		{
			super(context);
			whitePaint.setColor(Color.WHITE);
		}
		
		@Override
		public void OnDraw(Canvas canvas) 
		{
			canvas.drawRect(rectangle, whitePaint);
		}
	}
}