This example shows how to add a custom attribute in regular Views for TouchFeedback effects using Android Data Binding.
In the class Bindings.java there is a method called "touchFeedback" that can be used in XML layout without a CustomView and set a touch feedback for views like:
- RelativeLayout
- ImageView
- LinearLayout
The method "touchFeedback" has a ColorDrawable parameter that will be the feedback color.
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_weight="1"
android:background="#F44336"
android:scaleType="center"
android:src="@mipmap/ic_launcher"
app:touchFeedback="@{@color/md_light_blue_A100}" />The feedback effect for API >= 21 (LOLLIPOP) is a Ripple Effect and for older versions is a selector with a smooth transaction between states
I wrote a post about it as well https://developer.beer/touch-feedback-with-android-data-binding-3cffbc9d3ad8?gi=af725482d218#.61vh0e2uv