title: Flutter: How to make a button expand to the size of its parent?
body: <p>I am trying to create square buttons, but Expanded doesn't seem to work the same as it does with containers. Take the following code for example</p>
  
  <pre><code>new Expanded(
   flex: 2,
     child: new Column(
       children: &lt;Widget&gt;[
         new Expanded(
           child:new Row(
             children: &lt;Widget&gt;[
               new Expanded(child: new MaterialButton(...)),
               new Expanded(child: new MaterialButton(....)),
  
               new Expanded(child: new Container(color: Colors.red)),
               new Expanded(child: new Container(color: Colors.green)),
             ]
           )
         )
       ],
     )
   )
  
   ....
  </code></pre>
  
  <p>It displays two buttons that are expanded horizontally, but not vertically. At the same time the containers will expand both horizontally and vertically. The same effect occurs if I do the following: </p>
  
  <pre><code>new Expanded(
   flex: 2,
     child: new Column(
       children: &lt;Widget&gt;[
         new Expanded(
           child:new Column(
             children: &lt;Widget&gt;[
               new Expanded(child: new MaterialButton(...)),
               new Expanded(child: new MaterialButton(....)),
  
               new Expanded(child: new Container(color: Colors.red)),
               new Expanded(child: new Container(color: Colors.green)),
             ]
           )
         )
       ],
     )
   )
  
   ....
  </code></pre>
  
  <p>Where I've changed the Row to Column. The buttons will expand vertically, but not horizontally, while the containers will do both. </p>
  
  <p>Is there a way have my buttons expand to fit their parent both vertically and horizontally?</p>