如何将嵌套的LinearLayout与顶部对齐

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:orientation="vertical">

        <!-- 嵌套的LinearLayout的内容 -->

    </LinearLayout>

</LinearLayout>

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:orientation="vertical">

        <!-- 嵌套的LinearLayout的内容 -->

    </LinearLayout>

</RelativeLayout>