小问题记录

CollapsingToolbarLayout的Toolbar折叠起来以后，按钮没有ripple效果

网页：https://code.google.com/p/android/issues/detail?id=176431

解决：The workaround also didn’t work for me (Doesn’t even work with the supplied sample code). The best strategy I came up till now is to set the background of the Toolbar to transparent:

<android.support.v7.widget.Toolbar

...

android:background="@android:color/transparent"/>

This enables the ripple effect (cropped to the Actionbar heigth) in expanded/collapsed/intermediate state.