Center View below another View

Question

I use RelativeLayout to post a View. Now I want to add another view, which is below the first view, and needs to be centered, referring to the first view. But there seems to be no option called something like android: layout_alignCenter .. How can I achieve this?

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="fill_parent"
       android:layout_width="fill_parent" android:gravity="top">

            <TextView
        android:text="Blaa"
        android:id="@+id/TextView1"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="100dp"
        android:gravity="center"
        />
            <TextView
        android:text="Foo"
        android:id="@+id/TextView2"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_below="@+id/TextView1"
            --- NEED STH THAT ALIGNS THIS SECOND VIEW CENTRAL UNDER THE FIRST VIEW --
        />
</RelativeLayout>

Answer 1

This is an old question, but still not answered, therefore ...

, , . , , . , . :

<TextView
    android:id="@+id/TextView2"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:layout_below="@+id/TextView1"
    android:layout_alignLeft="@+id/TextView1"
    android:layout_alignRight="@+id/TextView1"
    android:gravity="center"
    android:text="Foo" />

Answer 2

. , - LinearLayout.. , , - , , , , , .

Answer 3

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="top" >

    <TextView
        android:id="@+id/TextView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="100dp"
        android:gravity="center"
        android:text="Blaa" />

    <RelativeLayout
        android:id="@+id/rel_main"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/TextView1"
        android:layout_alignRight="@+id/TextView1"
        android:layout_below="@+id/TextView1"
        android:gravity="center" >

        <TextView
            android:id="@+id/TextView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:text="Foo" />
    </RelativeLayout>

</RelativeLayout>