Question

Normally button on clik fills orange color. When I set some image as button’s background, there is no action on clik. I’d like to add some glow when button is pressed.

Answer 1

Use a StateListDrawable. Type this into a file and store it as res/drawable/button_bg.xml. Then create 4 images (button_press.png, button_focus.png, button_disabled.png and button.png) and last set your background to button_bg.

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/button_press" android:state_pressed="true" />
    <item android:drawable="@drawable/button_focus" android:state_focused="true" />
    <item android:drawable="@drawable/button_disabled" android:state_enabled="false" />
    <item android:drawable="@drawable/button" />
</selector>

The “magic” behind this is that android will go from the top to bottom and use the first one matching your buttons state.