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效果图：

实现代码：

/**
 * Author : wangning
 * Email : maoning20080809@163.com
 * Date : 2022/10/25 23:26
 * Description : 我的零钱
 */

class SmallChange extends StatefulWidget {

  @override
  State<StatefulWidget> createState() => _SmallChangeState();

}

class _SmallChangeState extends State<SmallChange> {

  UserBean? _userBean;

  @override
  void initState() {
    super.initState();
    _initUser();
  }

  void _initUser() async {
    String account = SpUtils.getAccount();
    _userBean = await UserRepository.getInstance().findUserByAccount(account);
    setState(() {
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: WnAppBar.getAppBar(context, const Text("我的零钱")),

      body: Container(
        alignment: AlignmentDirectional.center,
        child: Column(

          children: [
            SizedBox(height: 40,),
            CommonUtils.getBaseIconPng("wc_small_change_icon", width: 80, height: 80),
            SizedBox(height: 30,),
            Text("我的零钱", style: TextStyle(fontSize: 20),),
            SizedBox(height: 12,),
            Text("￥${_userBean?.balance??'0'}", style: TextStyle(fontSize: 26, fontWeight: FontWeight.bold),),

            Expanded(child: Text("")),

            ElevatedButton(
                style: ButtonStyle(
                    backgroundColor: MaterialStateProperty.all(Colors.green),
                  shape: MaterialStateProperty.all(
                      RoundedRectangleBorder(borderRadius: BorderRadius.circular(30))
                  ),
                ),
                onPressed: (){
                  Navigator.push(context, MaterialPageRoute(builder: (context) => RechangeWidget()));
                },
                child: Container(
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.all(Radius.circular(30)),
                  ),
                  alignment: AlignmentDirectional.center,

                  width: 200,
                  height: 60,
                  child: Text("充值", style: TextStyle(fontSize: 22),),
                )
            ),
            SizedBox(height: 12,),
            ElevatedButton(
                style: ButtonStyle(
                  backgroundColor: MaterialStateProperty.all(Colors.white70),
                  shape: MaterialStateProperty.all(
                      RoundedRectangleBorder(borderRadius: BorderRadius.circular(30))
                  ),
                ),
                onPressed: (){
                  CommonToast.show(context, "暂未开发提现功能！");
                },
                child: Container(
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.all(Radius.circular(30)),
                  ),
                  alignment: AlignmentDirectional.center,

                  width: 200,
                  height: 60,
                  child: Text("提现", style: TextStyle(fontSize: 22, color: Colors.green),),
                )
            ),

            SizedBox(height: 30,),
          ],

        ),
      ),
    );
  }

}