How to make button width match parent?

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I want to know that how can I set a width to match parent layout width

new Container(
  width: 200.0,
  padding: const EdgeInsets.only(top: 16.0),
  child: new RaisedButton(
    child: new Text(
      "Submit",
      style: new TextStyle(
        color: Colors.white,
      )
    ),
    colorBrightness: Brightness.dark,
    onPressed: () {
      _loginAttempt(context);
    },
    color: Colors.blue,
  ),
),

I know about little bit on Expanded widget but Expanded expands view to both direction, i dont know how to do it.

23 Answers
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