How to handle the Ripple effect on 9-patch and CardView, and have control over the states of the selector?

RippleDrawable extends LayerDrawable. Touch feedback drawable may contain multiple child layers, including a special mask layer that is not drawn to the screen. A single layer may be set as the mask by specifying its android:id value as mask. The second layer can be StateListDrawable.

For example, here is our StateListDrawable resource with name item_selectable.xml:

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="..." android:state_selected="true"/>    <item android:drawable="..." android:state_activated="true"/>    <item android:drawable="..." android:state_focused="true" android:state_pressed="true"/>    <item android:drawable="..." android:state_pressed="true"/>    <item android:drawable="..."/></selector>

To achieve ripple effect along with selectors we can set drawable above as a layer of RippleDrawable with name list_selector_ripple.xml:

<?xml version="1.0" encoding="utf-8"?><ripple xmlns:android="http://schemas.android.com/apk/res/android"        android:color="@color/colorControlHighlight">    <item android:id="@android:id/mask">        <color android:color="@android:color/white"/>    </item>    <item android:drawable="@drawable/item_selectable"/></ripple>

UPD:

1) To use this drawable with CardView just set it as android:foreground, like this:

<android.support.v7.widget.CardView    ...    android:foreground="@drawable/list_selector_ripple"    />

2) To make the ripple effect works within the bounds of the 9-patch we should set this 9-patch drawable as mask of ripple drawable (list_selector_ripple_nine_patch.xml):

<?xml version="1.0" encoding="utf-8"?><ripple xmlns:android="http://schemas.android.com/apk/res/android"        android:color="@color/colorControlHighlight">    <item android:id="@android:id/mask" android:drawable="@drawable/your_nine_patch" />    <item android:drawable="@drawable/your_nine_patch" /></ripple>

Then set the background of view:

<LinearLayout    ...    android:background="@drawable/list_selector_ripple_nine_patch"    />

Simple way to create a ripple make a xml in drawable-v21 folder and use this code for xml.

android:backgroung="@drawable/ripple_xyz"

And if, Through java / dynamically use.

View.setBackgroundResource(R.drawable.ripple_xyz);

Here is the ripple_xyz.xml.

<?xml version="1.0" encoding="utf-8"?><ripple xmlns:android="http://schemas.android.com/apk/res/android"android:color="#228B22" >// ^ THIS IS THE COLOR FOR RIPPLE<item>    <shape        android:shape="rectangle"        android:useLevel="false" >        <solid android:color="#CCFFFFFF" />// ^ THIS IS THE COLOR FOR BACK GROUND    </shape></item>

You have to set a mask layer in the ripple.

Something like this:

<?xml version="1.0" encoding="utf-8"?><ripple xmlns:android="http://schemas.android.com/apk/res/android"    android:color="?attr/colorControlHighlight">    <item android:id="@id/mask">        <color android:color="@color/myColor" />    </item></ripple>