Android 9 Development Cookbook - Third Edition

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What if we wanted actual images for the graphics instead of just a color change? This is as easy as changing the drawable referenced in the item state. The source code available for download uses two graphics, downloaded from: https://pixabay.com/ (this site was chosen because the images are free to use and don't require a login).

Once you have your desired images, place them in the res/drawable folder. Then, change the state item line in the XML to reference your images. Here's an example:

<item 
    android:drawable="@drawable/checked_on" 
    android:state_checked="true"/> 

(Change check_on to match your image resource name)