CoordinatorLayout无法预览的问题

我的xml布局的代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">
    <!--Toolbar-->    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        android:fitsSystemWindows="true">        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="?attr/colorPrimary"
            android:minHeight="?attr/actionBarSize"
            android:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            app:theme="@style/ThemeOverlay.AppCompat.ActionBar"
            app:layout_scrollFlags="scroll|enterAlways">
        </android.support.v7.widget.Toolbar>    </android.support.design.widget.AppBarLayout>    <!--DrawerLayout-->
    <android.support.v4.widget.DrawerLayout
        android:id="@+id/dl_left"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/appbar">
        <!--主布局-->
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            <android.support.design.widget.TabLayout
                android:id="@+id/tabLayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="#30469b"
                app:tabGravity="fill"
                app:tabMode="fixed"
                app:tabSelectedTextColor="#ff0000"
                app:tabTextColor="#ffffff" />
            <ListView
                android:id="@+id/lv"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_below="@+id/tabLayout"
                app:layout_behavior="@string/appbar_scrolling_view_behavior">
            </ListView>
        </RelativeLayout>        <!--侧滑菜单-->
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#fff"
            android:layout_gravity="start">
            <ListView
                android:id="@+id/lv_left_menu"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:divider="@null"
                android:text="DrawerLayout" />
        </LinearLayout>
    </android.support.v4.widget.DrawerLayout></android.support.design.widget.CoordinatorLayout>