mobileCyberGamesApp/lib/pages/TipList.dart

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import '../styles/colors.dart';
import 'dart:ui';
import '../styles/totast.dart';
import 'package:flutter_redux/flutter_redux.dart';
import '../redux/AppState.dart';
import '../model/SystemNotice.dart';
import '../net/HttpManager.dart';
import '../net/Result.dart';
import 'TipInfo.dart';

class TipList extends StatefulWidget {
  @override
  TipListState createState() => TipListState();

  TipList({Key key}) : super(key: key);
}

class TipListState extends State<TipList> {
  int currentPage = 1;
  List<SystemNotice> tipList = [];
  bool isMore = false;
  ScrollController _mControll;

  Future<void> getListPage() async {
    isMore = false;
    if (currentPage != 1) {
      Toast.show(context, '加载中', -1, 'loading');
    }
    Result res = await HttpManager.get('systemNotice/page', data: {
      'userId': StoreProvider.of<AppState>(context).state.userInfo.id,
      'currentPage': currentPage,
      'pageNumber': 20,
    });
    Toast.hide();
    List<SystemNotice> list = tipList;
    if (res.success) {
      if (currentPage == 1) {
        list = [];
      }
      for (var item in res.data['pp']) {
        SystemNotice tip = SystemNotice.fromJson(item);
        list.add(tip);
      }
      if (res.data['page']['currentPage'] < res.data['page']['totalPage']) {
        isMore = true;
      }
    } else {}
    setState(() {
      tipList = list;
      PageStorage.of(context).writeState(context, tipList, identifier: ValueKey('tipList'));
    });
  }

  @override
  void initState() {
    super.initState();
    _mControll = ScrollController();
    tipList = PageStorage.of(context).readState(context, identifier: ValueKey('tipList')) ?? [];
    Future.delayed(Duration.zero, () => getListPage());
    _mControll.addListener(() {
      if (_mControll.position.pixels == _mControll.position.maxScrollExtent) {
        if (isMore) {
          currentPage++;
          getListPage();
        }
      }
    });
  }

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('消息列表'),
        centerTitle: true,
        elevation: 0,
      ),
      body: RefreshIndicator(
        color: PRIMARY_COLOR,
        backgroundColor: Colors.white,
        onRefresh: () async {
          currentPage = 1;
          getListPage();
        },
        child: Container(
          child: ListView.builder(
              physics: AlwaysScrollableScrollPhysics(),
              controller: _mControll,
              itemCount: tipList.isNotEmpty ? tipList.length : 1,
              itemBuilder: (BuildContext context, int index) {
                if (tipList.isEmpty) {
                  return Text(
                    '数据正在火速加载中...',
                    style: TextStyle(color: Colors.white30, fontSize: 13, height: 2),
                    textAlign: TextAlign.center,
                  );
                }
                return TipItem(
                    tipInfo: tipList[index],
                    tapInfo: () async {
                      bool res = await Navigator.push(context, CupertinoPageRoute(builder: (context) => TipInfo(notice: tipList[index])));
                      if (res != null) {
                        setState(() {
                          tipList = [];
                        });
                        currentPage = 1;
                        getListPage();
                      }
                    });
              }),
        ),
      ),
    );
  }
}

typedef OnTapHomeMenu = Function();

class TipItem extends StatelessWidget {
  TipItem({Key key, this.tipInfo, this.tapInfo}) : super(key: key);
  final SystemNotice tipInfo; // 用来储存传递过来的值
  final OnTapHomeMenu tapInfo;

  @override
  Widget build(BuildContext context) {
    return Container(
      // height: 108,
      margin: EdgeInsets.only(top: 10),
      color: SUB_COLOR,
      child: Material(
        color: Colors.transparent,
        child: InkWell(
          child: Padding(
            padding: EdgeInsets.symmetric(horizontal: 15),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.symmetric(vertical: 12),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      Text(readTimestamp(tipInfo.createTime, 'yyyy.MM.dd HH:mm:ss'), style: TextStyle(color: Color(0xFF9BA0AE), fontSize: 13)),
                      tipInfo.statusFlag == 0
                          ? Text('未读', style: TextStyle(color: PRIMARY_COLOR, fontSize: 13, fontWeight: FontWeight.bold))
                          : Text('已读', style: TextStyle(color: Colors.black, fontSize: 13, fontWeight: FontWeight.bold))
                    ],
                  ),
                ),
                Container(
                  height: 1,
                  color: Colors.black26,
                ),
                Padding(
                  padding: EdgeInsets.only(top: 10, bottom: 15),
                  child: Text(
                    tipInfo.content,
                    overflow: TextOverflow.ellipsis,
                    maxLines: 2,
                    style: TextStyle(color: Colors.white, fontSize: 14),
                    textAlign: TextAlign.left,
                  ),
                )
              ],
            ),
          ),
          onTap: tapInfo,
        ),
      ),
    );
  }
}