Android 项目总结报告

static News fromJSON(Map<String, dynamic> json) {
  return News(
    json['id'],
    json['pubDate'],
    json['pubDateStr'],
    json['title'],
    json['summary'],
    json['infoSource'],
    json['sourceUrl']
  );
}

static Overview fromJSON(Map<String, dynamic> json) {
  return Overview(
    json['currentConfirmedCount']!,
    json['confirmedCount']!,
    json['suspectedCount']!,
    json['curedCount']!,
    json['deadCount']!,
    json['seriousCount']!,
    json['suspectedIncr'],
    json['currentConfirmedIncr'],
    json['confirmedIncr'],
    json['curedIncr'],
    json['deadIncr'],
    json['seriousIncr']
  );
}

static ProvinceDesc fromJSON(dynamic json) {
  // this json is part of `provinceArray`
  var cityArray = json["cityArray"];
  List<CityDesc> list = cityArray
    .map<CityDesc>((city) => CityDesc(city["totalCured"], city["totalDeath"], city["childStatistic"], city["totalConfirmed"]))
    .toList();

  return ProvinceDesc(json["childStatistic"], json["totalCured"], json["totalDeath"], json["totalConfirmed"], list);
}

static AbroadNews fromJSON(dynamic json) {
  return AbroadNews(
    json['continents'],
    json['provinceName'],
    json['currentConfirmedCount'],
    json['confirmedCount'],
    json['curedCount'],
    json['deadCount']
  );
}

class NewsCard extends StatelessWidget {
  late News news;
  NewsCard(this.news);
}

Widget buildRow(BuildContext context) {
  return SizedBox(
    height: 50,
    child: Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: [
    Text(news.title),
    Icon(Icons.arrow_forward_ios),
      ],
    ),
  );
}

Widget buildButton(BuildContext context) {
  return OutlineButton(
    onPressed: () {
  Navigator.push(
    context,
    MaterialPageRoute(
      builder: (context) => NewsFullPage(news)
    ),
      );
    },
    child: buildRow(context),
  );
}

class OverviewCard extends StatelessWidget {
  late Overview overview;
  OverviewCard(this.overview);
}

@override
Widget build(BuildContext context) {
  return ConstrainedBox(
    constraints: BoxConstraints(
      maxHeight: 240
    ),
    child: Center(
      child: Padding(
  padding: EdgeInsets.all(10),
  child: buildGrid(context),
      )
    )
  );
}

Widget buildGrid(BuildContext context) {
  List<Widget> widgets = [];
  if(overview.confirmedIncr == null) {
    widgets = [
      buildOne(context, '现存确诊', overview.currentConfirmedCount, Colors.red),
      buildOne(context, '境外输入', overview.suspectedCount, Colors.orange),
      buildOne(context, '现存无症状', overview.seriousCount, Colors.brown),
      buildOne(context, '累计确诊', overview.confirmedCount, Colors.red),
      buildOne(context, '累计死亡', overview.deadCount, Colors.blueGrey),
      buildOne(context, '累计确诊', overview.curedCount, Colors.green),
    ];
  } else {
    widgets = [
      buildOneWithIncr(context, '现存确诊', overview.currentConfirmedCount, overview.currentConfirmedIncr!, Colors.red),
      buildOneWithIncr(context, '境外输入', overview.suspectedCount, overview.suspectedIncr!, Colors.orange),
      buildOneWithIncr(context, '现存无症状', overview.seriousCount, overview.seriousIncr!, Colors.brown),
      buildOneWithIncr(context, '累计确诊', overview.confirmedCount, overview.confirmedIncr!, Colors.red),
      buildOneWithIncr(context, '累计死亡', overview.deadCount, overview.deadIncr!, Colors.blueGrey),
      buildOneWithIncr(context, '累计确诊', overview.curedCount, overview.curedIncr!, Colors.green),
    ];
  }


  return GridView.count(
    crossAxisCount: 3,
    children: widgets,
  );
}

columns: [
  DataColumn(label: Text('地区')),
  DataColumn(label: Text('累计确诊'), numeric: true),
  DataColumn(label: Text('死亡'), numeric: true),
  DataColumn(label: Text('治愈'), numeric: true)
],

rows: provinceDescList.map((province) => DataRow(cells: [
      DataCell(Text(province.name, softWrap: true,)),
      DataCell(Text(province.totalConfirmed.toString())),
      DataCell(Text(province.totalDeath.toString())),
      DataCell(Text(province.totalCured.toString()))
])).toList(),

Widget buildTable(BuildContext context) {
  // TODO: implement build
  return DataTable(
    headingTextStyle: TextStyle(fontWeight: FontWeight.w800, fontSize: 16, color: Colors.black),
    headingRowHeight: 50,
    columns: [
      DataColumn(label: Text('地区')),
      DataColumn(label: Text('累计确诊'), numeric: true),
      DataColumn(label: Text('死亡'), numeric: true),
      DataColumn(label: Text('治愈'), numeric: true)
    ],

    rows: provinceDescList.map((province) => DataRow(cells: [
    DataCell(Text(province.name, softWrap: true,)),
    DataCell(Text(province.totalConfirmed.toString())),
    DataCell(Text(province.totalDeath.toString())),
    DataCell(Text(province.totalCured.toString()))
    ])).toList(),
  );
}

@override
Widget build(BuildContext context) {
  return SingleChildScrollView(
    scrollDirection: Axis.vertical,
    child: SingleChildScrollView(
      scrollDirection: Axis.horizontal,
      child: buildTable(context),
    )
  );
}

class AbroadDescTable extends StatelessWidget {
  late AbroadDesc abroadDesc;
  AbroadDescTable(this.abroadDesc);


  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      scrollDirection: Axis.vertical,
      child: SingleChildScrollView(
  scrollDirection: Axis.horizontal,
  child: buildTable(context),
      )
    );
  }

  Widget buildTable(BuildContext context) {
    var tableItems = abroadDesc.newslist;
    return DataTable(
      headingRowHeight: 50,
      headingTextStyle: TextStyle(fontWeight: FontWeight.w800, fontSize: 16, color: Colors.black),
      columns: [
  DataColumn(label: Text('地区')),
  DataColumn(label: Text('累计确诊'), numeric: true),
  DataColumn(label: Text('累计死亡'), numeric: true),
  DataColumn(label: Text('死亡率'), numeric: true)
      ],
      rows: tableItems.map((item) => DataRow(cells: [
      DataCell(Text(item.provinceName, softWrap: true,)),
      DataCell(Text(item.confirmedCount.toString(), textAlign: TextAlign.right,)),
      DataCell(Text(item.deadCount.toString(), textAlign: TextAlign.right,)),
      DataCell(Text(((item.deadCount / item.confirmedCount) * 100)
    .toStringAsFixed(2) + "%", textAlign: TextAlign.right,)),
      ])).toList(),

    );
  }

}

Widget buildFutureLocalDesc(BuildContext context) {
  final padding = EdgeInsets.only(left: 10, top: 10);
  final title1 = Container(
    padding: padding,
    child: Text("国内疫情数据", style: TextStyle(fontSize: 30, fontWeight: FontWeight.w900, color: Colors.blue),),
  );

  final title2 = Container(
    padding: padding,
    child: Text("疫情热点", style: TextStyle(fontSize: 30, fontWeight: FontWeight.w900, color: Colors.red),),
  );


  return FutureBuilder(
    future: fetchLocalDesc(),
    builder: (context, AsyncSnapshot snapshot) {
      List<Widget> firstchildren = [];
      List<Widget> secondchildren = [];

      if(snapshot.hasData && snapshot.data != null) {
  LocalDesc localDesc = snapshot.data;
  firstchildren = [title1, OverviewCard(localDesc.overview)];
  secondchildren = [title2, NewsShortcutPage(localDesc.newslist)];
      } else {
  firstchildren = [title1, CircularProgressIndicator()];
  secondchildren = [title2, CircularProgressIndicator()];
      }

      return Column(
  children: [
    Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: firstchildren,
    ),

    Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: secondchildren,
    )
  ],
      );
    }
  );
}

Widget buildFutureProvinceDesc(BuildContext context) {
  final title = Container(
    padding: EdgeInsets.only(left: 10, top: 10),
    child: Text("各地疫情数据", style: TextStyle(fontSize: 30, fontWeight: FontWeight.w900, color: Colors.grey),),
  );

  return FutureBuilder(
    future: fetchProvinceDesc(),
    builder: (context, AsyncSnapshot snapshot) {
      if(snapshot.hasData && snapshot.data != null) {
  List<ProvinceDesc> provinceDescList = snapshot.data;
  return Column(
    crossAxisAlignment: CrossAxisAlignment.start,
    children: [
      title,
      ProvinceDescTable(provinceDescList)
    ],
  );

      } else {
  return Column(
    crossAxisAlignment: CrossAxisAlignment.start,
    children: [
      title,
      CircularProgressIndicator()
    ],
  );

      }
    },
  );
}

@override
Widget build(BuildContext context) {

  // TODO: implement build
  return SingleChildScrollView(
    child: Column(
      children: [
  buildFutureLocalDesc(context),
  buildFutureProvinceDesc(context)
      ],
    ),
  );
}

class AbroadwidePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return FutureBuilder(
      future: fetchAbroadDesc(),
      builder: (context, AsyncSnapshot snapshot) {
  if(snapshot.hasData && snapshot.data != null) {
    AbroadDesc abroadDesc = snapshot.data;
    return AbroadDescTable(abroadDesc);
  } else {
    return CircularProgressIndicator();
  }
      }
    );
  }