IssueTracker

Component used: androidx.core:core-ktx

Version used: 1.8.0-alpha04

Devices/Android versions reproduced on: Pixel 6 Pro/A13-DP1, Pixel 3XL/A12

Short Description: Window.getDecorView() can no longer be used to get the WindowInsetsControllerCompat as the function always return null.

Explanation: In the version 1.8.0-alpha03 of androidx.core:core, WindowInsetsControllerCompat now fully depends on a View as seen in I29264. More importantly, following that change, the ViewCompat.getWindowInsetsController(View) function now relies on the rootView's layout params to determine whether if it's an instance of WindowManager.LayoutParams, and if not, null is returned (the previous implementation did not rely on the layout params). When passing decorView in the new function, getLayoutParams returns null, so because it isn't an instance of WindowManager.LayoutParams, ViewCompat.getWindowInsetsController(decoreView) always returns null too.