android - 如何使用 OnTouch() 检查图像是否被触摸

Question

我正在尝试获取 Touch of Image 上的 x,y 坐标，并且我想在该坐标上执行一些操作。那么，谁能告诉我如何在触摸图像时获取图像的 x、y 坐标。提前致谢。

我的代码-

public class MovableObject extends ImageView implements OnTouchListener{

    Bitmap myBmp;
    Paint myPaint = new Paint();
    int MoveX = 0;

    public MovableObject(Context context,int moveObject,Bitmap myBmp) {
        super(context);
        super.setClickable(true);
        this.myBmp = myBmp;
        myPaint.setColor(Color.WHITE);
        this.MoveX = moveObject;
        setOnTouchListener(this);
    }
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawBitmap(myBmp, MoveX, 100, myPaint);
    }
    @Override
    public boolean onTouch(View v, MotionEvent event) {

        switch (event.getAction() & MotionEvent.ACTION_MASK) {

            case MotionEvent.ACTION_DOWN:
                System.out.println("down...."+event.getX()+" "+event.getY());
            case MotionEvent.ACTION_MOVE:
        }
        return true;
    }
}

通过这个我得到了我点击的 x,y 坐标，但我想在我点击我的图片时得到 x,y 坐标。

Answer 1

MoveX - It is the starting x co-ordinate of your view.
MoveY -It is the starting y co-ordinate of your view.
imgHeiht - It is theHeight of the Image;
imgWidth - It is the Width of the Image;

event.getX()- It is the actual position of your X co-ordinate.

event.getY()- It is the actual position of your Y co-ordinate.

if(MoveX <= event.getX() && event.getX()<= (MoveX+imgWidth) && (MoveY <= event.getY() && (event.getY() <= MoveY+imgHeight))){
    System.out.println("down...."+event.getX()+" "+event.getY());
    }

这可能对你有帮助。