Layout перекрывает TabHost

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="ru.devhead.ru.costofdelivery.app.myapplication5.app.MainActivity">

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <TabHost
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:id="@+id/tabHost">

            <RelativeLayout
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:orientation="vertical">

                <TabWidget
                    android:id="@android:id/tabs"
                    android:layout_width="fill_parent"
                    android:layout_alignBottom = "@android:id/tabcontent"
                    android:layout_height="wrap_content"></TabWidget>

                <FrameLayout
                    android:id="@android:id/tabcontent"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent">

                    <LinearLayout
                        android:id="@+id/tab1"
                        android:layout_width="fill_parent"
                        android:layout_height="fill_parent"></LinearLayout>

                    <LinearLayout
                        android:id="@+id/tab2"
                        android:layout_width="fill_parent"
                        android:layout_height="fill_parent"></LinearLayout>

                    <LinearLayout
                        android:id="@+id/tab3"
                        android:layout_width="fill_parent"
                        android:layout_height="fill_parent"></LinearLayout>
                </FrameLayout>
            </RelativeLayout>
        </TabHost>
    </LinearLayout>
</RelativeLayout>