drawerlayout's height does't work : I want make a map APP and I used Drawerlayout,my main layout is a Relativelayout and left drawer is a Linerlayout, my layout is as bellow.

    <android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/main_drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <RelativeLayout
        android:id="@+id/fragment_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    

        <com.esri.arcgisruntime.mapping.view.MapView
            android:id="@+id/main_map"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentStart="true"
            android:layout_alignParentTop="true"></com.esri.arcgisruntime.mapping.view.MapView>
        <!--SearchBar部分-->
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:orientation="horizontal" android:layout_width="500dp"
            android:layout_height="50dp"
            android:layout_marginTop="20dp"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:layout_marginLeft="20dp">

            <ImageButton
                android:id="@+id/searchbar_more_button"
                android:layout_width="50dp"
                android:layout_height="match_parent"
                android:src="@drawable/main_searchbar_more"
                android:background="@color/mainColor"
                android:scaleType="centerInside"/>

            <EditText
                android:id="@+id/searchbar_searchtext_textview"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:background="@color/whiteColor"
                android:gravity="center"
                android:hint="请输入要查询的信息"
                android:textAlignment="viewStart"
                android:textSize="20dp" />
            <ImageButton
                android:paddingTop="5dp"
                android:paddingBottom="5dp"
                android:id="@+id/searchbar_search_button"
                android:layout_width="50dp"
                android:layout_height="match_parent"
                android:background="@color/mainColor"
                android:src="@drawable/main_searchbar_search"
                android:scaleType="centerInside"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="40dp"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:layout_alignParentTop="true"
            android:layout_alignParentRight="true"
            android:layout_marginTop="70dp"
            android:layout_marginRight="20dp">

            <ImageButton
                android:id="@+id/main_global_button"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:scaleType="centerInside"
                android:background="@color/mainColor"
                android:src="@drawable/main_global_button" />

            <ImageButton
                android:id="@+id/main_layerswitch_button"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:layout_marginTop="20dp"
                android:scaleType="centerInside"
                android:background="@color/mainColor"
                android:src="@drawable/main_layerswitch_button" />

            <ImageButton
                android:id="@+id/main_electricity_button"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:layout_marginTop="20dp"
                android:scaleType="centerInside"
                android:background="@color/mainColor"
                android:src="@drawable/main_electricity_button" />

            <ImageButton
                android:id="@+id/main_measure_button"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:layout_marginTop="20dp"
                android:background="@color/mainColor"
                android:scaleType="centerInside"
                android:src="@drawable/main_measure_button" />

            <ImageButton
                android:id="@+id/main_location_button"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:layout_marginTop="20dp"
                android:background="@color/mainColor"
                android:scaleType="centerInside"
                android:src="@drawable/main_location_button" />
        </LinearLayout>


    </RelativeLayout>
    <!--左边抽屉菜单-->
    <LinearLayout
        android:id="@+id/menu_layout_left"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="left"
        android:orientation="vertical">
        <include layout="@layout/left_drawer"></include>
    </LinearLayout>
</android.support.v4.widget.DrawerLayout>

But I find the drawer's height is depended on searchbar and image button's height,when I run the code on my tablet,the result is like this:
[enter image description here][1]


  [1]: https://i.stack.imgur.com/Y8dFn.jpg
You can see that the drawer's height is wrong. Is there anyone know the reason?
Thanks very much.