Flutter 州政府：等待： 返回中心（子项：CircularProgressIndicator（））； 案例连接状态.active： 返回文本（“”）； 案例连接状态。完成： if（snapshot.hasError）{ 返回文本( “${snapshot.error

州政府：等待： 返回中心（子项：CircularProgressIndicator（））； 案例连接状态.active： 返回文本（“”）； 案例连接状态。完成： if（snapshot.hasError）{ 返回文本( “${snapshot.error}”， 样式：TextStyle（颜色：Colors.red）， ); }否则{ 返回CheckboxListTile( 标题：文本（“本地化.获取”）， controlAffinity:ListTileControlAffinity.leading， 值：snapshot.data， 一旦更改：（值）{ //已获取设置（设置、值）； }); } } })); } } 类设置{}

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由于您一次获取所有内容，因此可以使用FutureBuilder包装ListView，然后您可以迭代元素以绘制ListTile。由于您一次获取所有内容，因此可以使用FutureBuilder包装ListView，然后您可以迭代元素以绘制ListTile。

Future<Map<String, dynamic>> getItem(String tableName, String id) async {
    Database db = await this.db;
    var result = await db.rawQuery(
        "SELECT * FROM $tableName WHERE $colId = $id ORDER BY $colCategory DESC, $colName DESC");
    Map<String, dynamic> singleMap = result[0];
    return singleMap;
  }

 Future<bool> isObtainedDB(Settings settings) async {
    var map = await _dbHelper.getItem(_dbHelper.tblSavedata, id);
    //var map = Map<String, dynamic>();
    bool obtained = map[_dbHelper.colObtained];
    return obtained;
  }

FutureBuilder(
          future: isObtainedDB(settings),
          builder: (context, snapshot) {
            return CheckboxListTile(
              title: Text(localization.obtained),
              controlAffinity: ListTileControlAffinity.leading,
              value: isObtainedDB(settings),
              onChanged: (value) {
                setObtained(settings, value);
              });}),

FutureBuilder(
  future: isObtainedDB(settings),
  builder: (context, snapshot) {
    return CheckboxListTile(
      title: Text(localization.obtained),
      controlAffinity: ListTileControlAffinity.leading,
      value: snapshot.data, //true or false
      onChanged: (value) {
        setObtained(settings, value);
      }
    );
  }
)

@override
  void initState() {
    _future = isObtainedDB(settings);
    super.initState();
  }
 ... 
body: FutureBuilder(
            future: _future, 

switch (snapshot.connectionState) {
        case ConnectionState.none:
          return Text('none');
        case ConnectionState.waiting:
          return Center(child: CircularProgressIndicator()); 

CheckboxListTile(
                    title: Text("localization.obtained"),
                    controlAffinity: ListTileControlAffinity.leading,
                    value: snapshot.data,

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Future<bool> _future;
  Settings settings = Settings();

  Future<Map<String, dynamic>> getItem(String tableName, String id) async {
    await Future.delayed(Duration(seconds: 5), () {});
    /*Database db = await this.db;
    var result = await db.rawQuery(
        "SELECT * FROM $tableName WHERE $colId = $id ORDER BY $colCategory DESC, $colName DESC");
    Map<String, dynamic> singleMap = result[0];*/
    return Future.value(null);
  }

  Future<bool> isObtainedDB(Settings settings) async {
    var map = await getItem("_dbHelper.tblSavedata", "id");
    //var map = Map<String, dynamic>();
    bool obtained = true; //map[_dbHelper.colObtained];
    return obtained;
  }

  @override
  void initState() {
    _future = isObtainedDB(settings);
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: FutureBuilder(
            future: _future,
            builder: (context, AsyncSnapshot<bool> snapshot) {
              switch (snapshot.connectionState) {
                case ConnectionState.none:
                  return Text('none');
                case ConnectionState.waiting:
                  return Center(child: CircularProgressIndicator());
                case ConnectionState.active:
                  return Text('');
                case ConnectionState.done:
                  if (snapshot.hasError) {
                    return Text(
                      '${snapshot.error}',
                      style: TextStyle(color: Colors.red),
                    );
                  } else {
                    return CheckboxListTile(
                        title: Text("localization.obtained"),
                        controlAffinity: ListTileControlAffinity.leading,
                        value: snapshot.data,
                        onChanged: (value) {
                          //setObtained(settings, value);
                        });
                  }
              }
            }));
  }
}

class Settings {}