Spanning columns with TableLayout [duplicate]

add android:layout_span=”3″ to span 3 columns.
For example:

        <TableRow>
            <Button android:id="@+id/item_id"
                android:layout_span="2"
                android:layout_width="wrap_content" 
                android:layout_height="wrap_content" 
                android:text="item text" />     
        </TableRow>