TableLayout columns equal width

Something easy like columns of equal width in a TableLayout shouldn't be difficult. It's not, but there is a trick to getting the desired layout. layout_width="0dip" and layout_weight="1" tags must be set in your XML layout. Here's an example:

<tablelayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:stretchColumns="1">

    <TableRow>
      <!-- Column 1 -->
      <TextView
         android:id="@+id/tbl_txt1"
         android:layout_width="0dip"
         android:layout_height="wrap_content"
         android:background="@color/red"
         android:textColor="@color/white"
         android:padding="10dip"
         android:layout_margin="4dip"
         android:layout_weight="1"
         android:text="Column 1" />
         
      <!-- Column 2 -->
      <TextView
         android:id="@+id/tbl_txt2"
         android:layout_width="0dip"
         android:layout_height="wrap_content"
         android:background="@color/red"
         android:textColor="@color/white"
         android:padding="10dip"
         android:layout_margin="4dip"
         android:layout_weight="1"
         android:text="Column 2" />
         
      <!-- Column 3 -->
      <TextView
         android:id="@+id/tbl_txt3"
         android:layout_width="0dip"
         android:layout_height="wrap_content"
         android:background="@color/red"
         android:textColor="@color/white"
         android:padding="10dip"
         android:layout_margin="4dip"
         android:layout_weight="1"
         android:text="Column 3" />
    </TableRow>
</TableLayout>