huixiang_app/lib/message/mine_message.dart

import 'dart:collection';

import 'package:flutter/material.dart';
import 'package:huixiang/view_widget/message_item.dart';

class MineMessagePage extends StatefulWidget {
  final int status;
  final Function(bool) onChanged;
  MineMessagePage(this.status, this.onChanged);

  @override
  State<StatefulWidget> createState() {
    return _MineMessagePage();
  }

}

class _MineMessagePage extends State<MineMessagePage> {
  Map<int, bool> map;

  @override
  void initState() {
    super.initState();
    map = HashMap();
  }

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Container(
        margin: EdgeInsets.only(
          left: 16,
          right: 16,
          top: 32,
        ),
        padding: EdgeInsets.only(top: 16, bottom: 16),
        decoration: BoxDecoration(
            color: Colors.white,
            boxShadow: [
              BoxShadow(
                  color: Colors.black.withAlpha(12),
                  offset: Offset(0, 3),
                  blurRadius: 14,
                  spreadRadius: 0)
            ],
            borderRadius: BorderRadius.all(Radius.circular(8))),
        child: ListView.builder(
            itemCount: 12,
            shrinkWrap: true,
            physics: new NeverScrollableScrollPhysics(),
            itemBuilder: (context, position) {
              return Container(
                margin: EdgeInsets.only(top: 12, bottom: 12),
                child: GestureDetector(
                  onTap: () {
                    Navigator.of(context).pushNamed('/router/system_msg_page');
                  },
                  child: MessageItem(widget.status, (check) {
                    map[position] = check;
                    refreshStatus();
                  }),
                ),
              );
            }),
      ),
    );
  }

  refreshStatus() {
    var isOneCheck = false;
    map.forEach((key, value) {
      if (value) {
        isOneCheck = true;
      }
    });
    if (widget.onChanged != null) {
      widget.onChanged.call(isOneCheck);
    }
  }
}