CODEWITHSUNDEEP
androidandroid-layoutandroid-constraintlayout
dev90
dev90

Reputation: 7519

How to get the x & Y coordinates of a view

I have placed an image view in my layout, now i need to know its x & y coordinates to draw some stuff over it dynamically.

enter image description here

I tried imageView.getTop(); & imageView.getY()but they both return "0", but the image is not starting from "0" there is some margin from start and much margin from top.

Is there any other way to get this.

Upvotes: 1

Views: 664

Answers (2)

Juan Fraga
Juan Fraga

Reputation: 464

To ensure view has had a chance to update, run your location request after the View's new layout has been calculated by using view.post:

view.post {
    val point = IntArray(2)
    view.getLocationOnScreen(point)
    val (x, y) = point
}

Values SHOULD no longer be 0 but i had bad experiences with huawei devices. Other way to get x and y coordinates is using viewTreeObserver

view.viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
            override fun onGlobalLayout() {
                view.viewTreeObserver.removeOnGlobalLayoutListener(this)      
                val point = IntArray(2)
                view.getLocationOnScreen(point)
                val (x, y) = point
            }
});

Possibly you experience some visual glitch with this approach

Upvotes: 1

Blagojco
Blagojco

Reputation: 346

Try with imageView.getLocationOnScreen(int[]) to get X and Y of a view relative to its parent/screen:

int[] positions = new int[2];
imageView.getLocationOnScreen(positions);
int x = positions[0];
int y = positions[1];

Upvotes: 1

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