Android开发经验之点击图片判断是否在图片范围之内

package xiaosi.grivaty;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.View;

public class Rects extends View
{

	private Bitmap bitmap = null;
	private float x,y;
	public Rects(Context context)
	{
		super(context);
	}

	@Override
	protected void onDraw(Canvas canvas)
	{
		super.onDraw(canvas);
		bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.v);
		canvas.drawBitmap(bitmap, 0, 0, null);
		
		//创建和位图一样位置的Rect
		Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
		if(rect.contains((int)x, (int)y)){
			System.out.println("范围之内");
		}
		else{
			System.out.println("范围之外");
		}
		System.out.println("图片宽度：" + bitmap.getWidth() + "图像高度：" + bitmap.getHeight());
		System.out.println("点击X：" + x + "点击Y：" + y);
	}

	@Override
	public boolean onTouchEvent(MotionEvent event)
	{
		if (event.getAction() == MotionEvent.ACTION_DOWN)
		{
			x = event.getX();
			y = event.getY();
			// 重绘
			invalidate();
		}
		return true;
	}
	
}