Android MaterialCardView's drop shadow/elevation disappears when rotating it 180 degrees-CodePudding

The

90 degrees:

180 degrees:

As you can see, no drop shadow when it's rotated 180 degrees (when the origin is 0 degrees).

Any help would be appreciated as to why I am getting this problem, it's not major but it makes the UI of my app inconsistent.

Note: for some reason, I only get the issue on phones but not tablet devices.

CodePudding user response：

You're setting android:outlineProvider="none" on most items ... while the drop-shadow being used might have the wrong offset coordinates - you'd need to substract instead of adding the offset. There's too little code provided to answer this more accurately - but with high probability, the shadow is just hidden underneath the canvas, due to the stated cause. I'd suggest to provide your own implementation of ViewOutlineProvider and then pass this instead of none.

CodePudding user response：

You need to set total (left, right, bottom and top) of 16dp on each side android:layout_margin="16dp" and set app:cardElevation="4dp", it will work.