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; 
    } 
     
} 
  
 
 


摘自 落日小屋

补充：移动开发 , Android ,