Lollipop RippleDrawable vs Selector for Pre-Lollipop
1) Yes. See the documentation for RippleDrawable for more details on how layers are composited, but basically you want:
<?xml version="1.0" encoding="utf-8"?><ripple xmlns:android="http://schemas.android.com/apk/res/android" android:color="?android:attr/colorControlHighlight"> <item android:drawable="@drawable/yourninepatch" /></ripple>Or to also handle the disabled state in a clean way, you might want:
<?xml version="1.0" encoding="utf-8"?><ripple xmlns:android="http://schemas.android.com/apk/res/android" android:color="?android:attr/colorControlHighlight"> <item> <selector> <item android:state_enabled="false"> <nine-patch android:src="@drawable/yourninepatch" android:alpha="?android:attr/disabledAlpha" /> </item> <item> <nine-patch android:src="@drawable/yourninepatch" /> </item> </selector> </item></ripple>2) Yes, you should place your ripple XML in drawable-v21.