Flutter 更改 TextField Border 颜色

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter TextInput Border Color Example',
      home: FlutterExample(),
    );
  }
}

class FlutterExample extends StatefulWidget {
  @override
  _FlutterExampleState createState() => _FlutterExampleState();
}

class _FlutterExampleState extends State<FlutterExample> {
  final myController = TextEditingController();

  @override
  void dispose() {
    myController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('TextField Border Color'),
        ),
        body: Padding(
          padding: EdgeInsets.all(16),
          child: Center(
            child: TextField(
              decoration: InputDecoration(
                focusedBorder: OutlineInputBorder(
                  borderSide: BorderSide(color: Colors.blue, width: 2.0),
                ),
                enabledBorder: OutlineInputBorder(
                  borderSide: BorderSide(color: Colors.green, width: 2.0),
                ),
                hintText: 'Enter your name',
              ),
              controller: myController,
            ),
          ),
        ));
  }
}