How to get the device height and width in Android

Question

I am using to get the device with and height using of the following code.

screenHeight = getWindowManager()
                    .getDefaultDisplay().getHeight();
            screenWidth = getWindowManager()
                    .getDefaultDisplay().getWidth();

But getDefaultDisplay() is deprecated. So I search for the solution and I got the following solution.

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
            final WindowMetrics metrics = getWindowManager().getCurrentWindowMetrics();
            // Gets all excluding insets
            final WindowInsets windowInsets = metrics.getWindowInsets();
            Insets insets = windowInsets.getInsetsIgnoringVisibility(WindowInsets.Type.navigationBars()
                    | WindowInsets.Type.displayCutout());

            screenWidth = insets.right + insets.left;
            screenHeight = insets.top + insets.bottom;
           
        }else{
            screenHeight = getWindowManager()
                    .getDefaultDisplay().getHeight();
            screenWidth = getWindowManager()
                    .getDefaultDisplay().getWidth();
        }

But Here I am getting always zero for the width and height 126. Please help me on this.

I tried the following code also. But not getting the exact screen width and height.

DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
            float dpHeight = displayMetrics.heightPixels / displayMetrics.density;
            float dpWidth = displayMetrics.widthPixels / displayMetrics.density;
            screenHeight =  convertDpToPixel(dpHeight,this);
            screenWidth = convertDpToPixel(dpWidth,this);