Android different EditText backgrounds for different states using shapes, selector or list

I suggest to use NinePatch images to customize your EditText. Here goes an example based on my code:

The Selector:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_window_focused="false" android:state_enabled="true"
        android:drawable="@drawable/twitter_im_edittext_normal" />
  <item android:state_window_focused="false" android:state_enabled="false"
        android:drawable="@drawable/twitter_im_edittext_normal" />
  <item android:state_pressed="true" android:drawable="@drawable/twitter_im_edittext_normal" />
  <item android:state_enabled="true" android:state_focused="true" android:drawable="@drawable/twitter_im_edittext_focused" />
  <item android:state_enabled="true" android:drawable="@drawable/twitter_im_edittext_normal" />
  <item android:state_focused="true" android:drawable="@drawable/twitter_im_edittext_focused" />
  <item android:drawable="@drawable/twitter_im_edittext_normal" />
</selector>

Use selector the same way you used in your code, set it to background of your EditText.

Images:

twitter_im_edittext_focused.9.png

twitter_im_edittext_normal.9.png

More about NinePatch images you can found here.

Hope it helps.

A short version of the accepted answer

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_enabled="true" android:state_focused="true"
        android:drawable="@drawable/edit_text_background_focused" />
    <item android:drawable="@drawable/edit_text_background_normal" />
</selector>