multi touch - Bug with Android 11 and (some) Samsung phones

Question

I’ve stumbled upon a bug about multi touch.

It seems that, from the latest Android 11 update, my app cannot get consistent coordinates inside a view.

Tested with S20+ on Samsung lab.

Let’s say i touch a view on its very top left point. A MotionEvent is spawned and event.getX() and event.getY() returns 0.

BUT… if i press the screen with 2 finger, one in a random screen area and one on the same top-left pixel of the previous view… the latter gets

event.getX() -> 300 (circa, depending on where the View is inside the screen) event.getY() -> 400 (same)

Is it a bug or i’m doing something wrong? This didn’t happen with any Samsung phone with Android 10 or any non-Samsung phone

Any workaround?

question from:https://stackoverflow.com/questions/65938332/bug-with-android-11-and-some-samsung-phones

Answer 1

Waitting for answers