Na hora de fazer o debug, dá erro, ja revisei o código e nada.

class FormularioTransferencia extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Criando Transferência'),
       ),
       body: Column(
         children: <Widget>[
           Padding(
             padding: const EdgeInsets.all(16.0),
             child: TextField(
               style: TextStyle(
                 fontSize : 17.0,
               ),
               decoration: InputDecoration(
                 labelText: 'Numero da Conta',
                 hintText: '0000'
               ),
               keyboardType: TextInputType.number,
             ),
           ),
           Padding(
             padding: const EdgeInsets.all(16.0),
             child: TextField(
               style: TextStyle(
                 fontSize : 17.0,
               ),
               decoration: InputDecoration(
                 icon: Icon(Icons.monetization_on),
                 labelText: 'Valor',
                  hintText: '0.00'
               ),
               keyboardType: TextInputType.number,
             ),
           ),
          RaisedButton(
            child: Text('Confimar'),
          ),
        ],
      ),     
    );
  }
}