relativeLayout按下换颜色背景

颜色背景xml<selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true" android:drawable="@color/rblue"/>
        <item android:state_focused="true"  android:drawable="@color/rblue"/>
    <item android:drawable="@color/white"/>
</selector>

使用该文件RelativeLayout 布局
<RelativeLayout
         android:layout_width="fill_parent"
             android:layout_height="50dip"
             android:gravity="center_vertical"

　　　　 android:clickable="true"
             android:background="@drawable/relatbg"
             >
</RelativeLayout>