Android TextView fill_parent

Question

I need to build a layout similar to the following:

The three rows in the left are TextViews, whose total height is unknown at the beginning. The element in the right should be any widget that can change its background color dynamically. And it should span its height to fill the parent.

How can I achieve this? What widget should I use to display the color? And what layout?

I tried the following using a TextView for the right element, but it doesn't fill the parent.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

<TextView 
    android:id="@+id/txtRow_color"
    android:layout_width="10dip"
    android:layout_height="fill_parent"
    android:layout_alignParentRight="true"  
    android:layout_alignParentTop="true"
    android:layout_alignParentBottom="true"
    android:background="#ff23cf"      
    android:text="" />

    <TextView
        android:id="@+id/txtRow_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_toLeftOf="@id/txtRow_color"
        android:textColor="#FFFF66"
        android:text="@string/nullstring" />

    <TextView
        android:id="@+id/txtRow_Tweet"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentBottom="true"
        android:layout_below="@id/txtRow_name"
        android:layout_toLeftOf="@id/txtRow_color"
        android:layout_alignWithParentIfMissing="true"
        android:gravity="center_vertical"
        android:text="@string/nullstring" />

</RelativeLayout>

Answer 1

can try

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="wrap_content"
    android:orientation="horizontal" android:weightSum="1">

    <LinearLayout android:layout_width="0dp"
        android:layout_height="wrap_content" android:orientation="vertical"
        android:layout_weight=".8">
        <TextView android:id="@+id/te" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Text1" />
        <TextView android:id="@+id/tile" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Text2" />
        <TextView android:id="@+id/e" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Text3" />

    </LinearLayout>

    <LinearLayout android:layout_width="0dp"
        android:layout_height="fill_parent" android:layout_weight=".2"
        android:background="@color/green">

    </LinearLayout>
</LinearLayout>