Ripple Effect Duration In Android Xml

I am Learning Material Design. I tried ripple effect on button using this gradle dependencies { compile 'com.github.traex.rippleeffect:library:1.3' } from this https://github.com

Solution 1:

You need to add xmlns:app="http://schemas.android.com/apk/res-auto" as an xmlns in your RippleView before using the app resource.

Solution 2:

Problem in the example on the page of description in GitHab. Change

rv_centered="true"

to

app:rv_centered="true"

and all will be done. All attribute of ReppleView must contain app: