<?xml version="1.0" encoding="utf-8"?>
<selectorxmlns:android="http://schemas.android.com/apk/res/android">
  <itemandroid:state_pressed="true" android:drawable="@drawable/button_pressed"/>
  <itemandroid:state_focused="true" android:drawable="@drawable/button_pressed"/> 
   <itemandroid:drawable="@drawable/button_normal"/>
</selector>

<LinearLayout
  android:layout_height="wrap_content"
  android:layout_width="wrap_content"
  android:clickable="true"<!--这条是必须的，否则没有高亮显示效果，这有别于自动的button，textview等其他控件-->
    android:background="@drawable/linearlayout_background"> 
<Button ....../>
<TextView ...../>
</LinearLayout>