Android：如何获取图像/ ImageView中的xy坐标？

Question

I have an image (ImageView) on my screen. The image takes up roughly half of the screen which means that you can click both on the image and on the side of the image.

How to I get the x -and y coordinates on the screen when I click on the image?

I tried using onTouchEvent but it is only called when I click outside of the image, not when I click on the image.

Regards, Mattias

Answer 1

You can use getLocationOnScreen()

imageView.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {
            int[] values = new int[2]; 
            view.getLocationOnScreen(values);
            Log.d("X & Y",values[0]+" "+values[1]);
        }
    });

Also, this answer of mine will be useful as well.

Answer 2

I ended up not setting any OnClickListener on the ImageView at all. Instead I only implement "public void onTouch(MotionEvent event)" and "public void onWindowFocusChanged(boolean hasFocus)" like this:

private int fieldImgXY[] = new int[2];

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);

    // Use onWindowFocusChanged to get the placement of
    // the image because we have to wait until the image
    // has actually been placed on the screen  before we
    // get the coordinates. That makes it impossible to
    // do in onCreate, that would just give us (0, 0).
    fieldImage.getLocationOnScreen(fieldImgXY);
    Log.i(LOG_TAG, "fieldImage lockation on screen: " + 
            xyString(fieldImgXY[0], fieldImgXY[1]));
}

public boolean onTouchEvent(MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        Log.i(LOG_TAG, "touch event - down");

        int eventX = (int) event.getX();
        int eventY = (int) event.getY();
        Log.i(LOG_TAG, "event (x, y) = " + xyString(eventX, eventY));

        int xOnField = eventX - fieldImgXY[0];
        int yOnField = eventY - fieldImgXY[1];
        Log.i(LOG_TAG, "on field (x, y) = " + xyString(xOnField, yOnField));
    }
    return super.onTouchEvent(event);
}

Answer 3

imageview.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_DOWN) {
                    int x = (int) event.getX();
                    int y = (int) event.getY();
                }
                return false;
            }
        });

Answer 4

在ImageView上使用OnClickListener来接收单击事件，或从ImageView中抽象on类并覆盖函数“ public void onTouch（MotionEvent evt）”以从该视图获取X / Y坐标。