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; } }