DrawerLayout侧滑布局点击不响应事件

drawerlayout必须放在主界面布局后面

google的api是这样写的：

To use a DrawerLayout, position your primary content view as the first child with a width and height of match_parent. Add drawers as 
child views after the main content view and set the layout_gravity appropriately. Drawers commonly use match_parent for height with
 a fixed width.

布局这么写就OK了

  <android.support.v4.widget.DrawerLayout
        android:id="@+id/contact_drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <!-- The navigation drawer -->
        <include
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            layout="@layout/activity_contact_list_center"/>
        <!--侧滑布局-->
        <include
            android:id="@+id/contact_list_side"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            layout="@layout/activity_contact_list_side"/>
    </android.support.v4.widget.DrawerLayout>