.dart

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      body: SafeArea(
          child: Column(children: <Widget>[
          _path == null ? Image.asset("images/place-holder.png") : 
          Image.file(File(_path))
          ,
          FlatButton(
            child: Text("Take Picture", style: TextStyle(color: Colors.white)),
            color: Colors.green, 
            onPressed: () {
              _showOptions(context);
            },
          )
        ]),
      )
    );

  }

}