Question

When creating button drawables, I typically follow the following format to implement an “onClick” change of background:

<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <item android:state_focused="true" android:state_pressed="true" 
        android:drawable="@drawable/RESOURCE_FOR_CLICKED" /> 
    <item android:state_focused="false" android:state_pressed="true" 
        android:drawable="@drawable/RESOURCE_FOR_CLICKED" /> 
    <item android:drawable="@drawable/RESOURCE_NORMAL" /> 
</selector>

This works fine for me when I am creating traditional buttons as I want them to return to their original state once onClick is finished, and I don’t have to implement any code.

However, this does not work for RadioButtons because I actually want their background drawable to be different in the non-pressed state once they have selected.

Are there XML attributes for states involving radio buttons that I should be aware of to implement this sort of thing? If not, do I have to manage the changing of backgrounds in code?

Answer 1

android:state_checked will let you specify a drawable for when a radio item is selected.