LinearLayout按下(pressed)或获取焦点(focused)时背景设置不同颜色或图片

 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/myview"
     android:orientation="horizontal"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:gravity="top"
     android:background="@drawable/myDrawable"
     android:clickable="true" >
 </LinearLayout>

加上 android:clickable="true" 就可以了