Can't get rid of shadow under Android Button

问题

I have a Android Button that I'm placing on my screen, and am defining a custom background drawable that just specifies a green rectangle for now. But, for some reason there appears to be a very thin shadow being drawn under my button (highlighted with the red box):

Is there any way to get rid of this while still using a Button? It because really ugly when I change my background drawable to have rounded corners.

Thanks!

回答1:

@alanv's comment was the correct answer: "On Material you need to set android:stateListAnimator="@null" to remove the default elevation animator. Alternatively, just use View if you don't want the default Button styling"

回答2:

Please try this.

style="?android:attr/borderlessButtonStyle"

来源：https://stackoverflow.com/questions/27408240/cant-get-rid-of-shadow-under-android-button