Drawable for a touch hover effect pre lollipop and with ripple effect and an example usage

touch_effect.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android" 
          android:exitFadeDuration="@android:integer/config_shortAnimTime">
    <item android:state_pressed="false">
        <color android:color="@android:color/transparent"/>
    </item>
  
    <item android:state_pressed="true">
          <!--<color name="touch_hover">#44565656</color> -->
        <color android:color="@color/touch_hover" />
    </item>
    <item android:drawable="@android:color/transparent" />
</selector>

touch_effect_v21.xml

<!-- res/drawables-v21 -->
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/touch_hover">
    <!--<color name="touch_hover">#44565656</color> -->
    <item
        android:id="@android:id/mask"
        android:drawable="@android:color/white" />
</ripple>

view_implement_touch.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:padding="8dp"
        android:layout_margin="8dp"
        android:layout_height="200dp">

        <ImageView
            android:layout_height="match_parent"
            android:src="@drawable/example"
            android:layout_width="match_parent"/>

        <View
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/touch_effect"/>

    </android.support.v7.widget.CardView>
</layout>