No ripples for MaterialCardView

Question

Are there no ripples on the new MaterialCardView?

I used CardView with android:clickable="true" and android:foreground="?android:attr/selectableItemBackground" which worked fine but with the new MaterialCardView there are no ripples at all

标签： android material-design material-components

举报

Answer 1

This is a bug with MaterialCardView. It's overriding the foreground after it's created. I've filled a bug. It should be fixed to show a ripple if the card is clickable without needing to set the foreground.

If you can't wait for a fix you could use CardView from the support lib, or you could change your code to set the foreground drawable after the CardView has been inflated, or we would gladly accept a pull request! Relevant code at: https://github.com/material-components/material-components-android/blob/master/lib/java/com/google/android/material/card/MaterialCardView.java. It can probably use https://github.com/material-components/material-components-android/blob/master/lib/java/com/google/android/material/ripple/RippleUtils.java and a RippleDrawable for SDK >= 21.