要使用 IntelliJ IDEA（或 Android Studio）的 Flutter 插件完成实验室安全测试平台的应用程序开发，你可以参考以下步骤：
### 1. 准备工作
#### 添加依赖
在 `pubspec.yaml` 文件中添加必要的依赖，例如 `sqflite` 用于数据库操作。
```yaml
dependencies:
flutter:
sdk: flutter
sqflite: ^1.3.0
```
保存文件后，点击编辑窗口右上角的 "Packages get" 按钮安装依赖。
### 2. 数据库设计
#### 创建数据库文件
根据需求，创建包含 8 个表的 `school.db` 数据库文件，每个表对应一种题库类。表结构如下：
```sql
CREATE TABLE tsl (
tino INTEGER PRIMARY KEY,
ticontent TEXT,
tia TEXT,
tib TEXT,
tic TEXT,
tid TEXT,
tianswer TEXT,
titype INTEGER
);
-- 其他表类似，例如 hxl, yxswl, jxjzl, dql, fsl, tzsbl, xfl
```
#### 将数据库文件放入资源目录
将 `school.db` 放入项目的 `assets/db` 目录，并在 `pubspec.yaml` 文件中声明资源文件。
```yaml
flutter:
assets:
- assets/db/school.db
```
### 3. 初始化数据库
#### 定义初始化数据库方法
在应用启动时检查数据库文件是否存在，如果不存在则从资源文件中复制。
```dart
import 'package:path_provider/path_provider.dart';
import 'package:sqflite/sqflite.dart';
import 'dart:io';
import 'package:path/path.dart';
Future<Database> initDB() async {
String path = join(await getDatabasesPath(), 'school.db');
bool exists = await databaseExists(path);
if (!exists) {
try {
await Directory(dirname(path)).create(recursive: true);
} catch (_) {}
ByteData data = await rootBundle.load(join('assets', 'db', 'school.db'));
List<int> bytes = data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
await File(path).writeAsBytes(bytes, flush: true);
}
return await openDatabase(path);
}
```
### 4. 题库选择页面
#### 定义题库类别按钮组
创建题库选择页面，包含题库类别的按钮组。
```dart
import 'package:flutter/material.dart';
class MainPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MainPageState(),
);
}
}
class MainPageState extends StatefulWidget {
@override
_MainPageState createState() => _MainPageState();
}
class _MainPageState extends State<MainPageState> {
List<String> types = [
'通识类\n安全题',
'化学类\n安全题',
'医学生物类\n安全题',
'机械建筑类\n安全题',
'电气类\n安全题',
'辐射类\n安全题',
'特种设备\n安全题',
'消防\n安全题',
'退出系统'
];
List<Widget> selects = [];
@override
void initState() {
super.initState();
initFlatButton(types, context);
}
void initFlatButton(List<String> types, BuildContext context) {
for (int i = 0; i < types.length; i++) {
FlatButton flatButton = FlatButton(
color: Colors.blue,
child: Text(
types[i],
style: TextStyle(fontSize: 18),
textAlign: TextAlign.center,
),
onPressed: () {
if (i < types.length - 1) {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Exam(examId: i, db: initDB()),
),
);
} else {
exit(0);
}
},
);
selects.add(flatButton);
}
}
@override
Widget build(BuildContext context) {
GridView gridView = GridView.count(
crossAxisCount: 3,
mainAxisSpacing: 3,
crossAxisSpacing: 3,
children: selects,
);
return Scaffold(
appBar: AppBar(title: Text('实验室安全测试平台')),
body: Padding(
padding: EdgeInsets.all(10),
child: gridView,
),
);
}
}
```
### 5. 测试页面
#### 获取测试题库表
根据用户选择的题库类型，从数据库中读取相应的题目。
```dart
import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
class Exam extends StatefulWidget {
final int examId;
final Future<Database> db;
Exam({@required this.examId, @required this.db});
@override
_ExamState createState() => _ExamState();
}
class _ExamState extends State<Exam> {
int examNo;
Database studyDB;
List<Map<String, dynamic>> maps = [];
List<Map<String, dynamic>> smaps = [];
String examType = 'tsl';
int jindex = 0;
var jselected = '';
String jticontent = '';
String jtino = '';
String jtia = '';
String jtib = '';
String jtianswer = '';
@override
void initState() {
super.initState();
widget.db.then((value) {
studyDB = value;
examNo = widget.examId;
examType = getExamType(examNo);
getJudgeDetail(examType, '1');
getSingleDetail(examType, '2');
});
}
String getExamType(int examNo) {
switch (examNo) {
case 0:
return 'tsl';
case 1:
return 'hxl';
case 2:
return 'yxswl';
case 3:
return 'jxjzl';
case 4:
return 'dql';
case 5:
return 'fsl';
case 6:
return 'tzsbl';
case 7:
return 'xfl';
default:
return 'tsl';
}
}
void getJudgeDetail(String examType, String tiType) async {
List<dynamic> values = [tiType];
String sql = 'SELECT * FROM $examType WHERE titype = ?';
List<Map<String, dynamic>> maps = await studyDB.rawQuery(sql, values);
setState(() {
this.maps = maps;
if (maps.isNotEmpty) {
jtino = maps[0]['tino'].toString();
jticontent = maps[0]['ticontent'];
jtia = maps[0]['tia'];
jtib = maps[0]['tib'];
jtianswer = maps[0]['tianswer'];
}
});
}
void getSingleDetail(String examType, String tiType) async {
List<dynamic> values = [tiType];
String sql = 'SELECT * FROM $examType WHERE titype = ?';
List<Map<String, dynamic>> smaps = await studyDB.rawQuery(sql, values);
setState(() {
this.smaps = smaps;
});
}
@override
Widget build(BuildContext context) {
// 生成测试页面
Widget jdetail = Padding(
padding: EdgeInsets.all(8),
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text('$jtino, $jticontent'),
RadioListTile(
value: 'a',
groupValue: jselected,
title: Text('A'),
subtitle: Text(jtia),
onChanged: (value) {
setState(() {
jselected = value;
});
},
),
// 其他选项代码类似
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Text(
'你选的答案为：$jselected',
style: TextStyle(color: jselected == jtianswer ? Colors.black : Colors.red),
),
FlatButton(
child: Text('查看解析'),
onPressed: () {
showModalBottomSheet(
context: context,
builder: (context) {
return Container(
alignment: Alignment.center,
height: 100,
child: Text('标准答案为：$jtianswer'),
);
},
);
},
),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
RaisedButton(
child: Text('上一题'),
onPressed: () {
if (jindex > 0) {
jindex--;
setState(() {
jselected = '';
jtino = maps[jindex]['tino'].toString();
jticontent = maps[jindex]['ticontent'];
jtia = maps[jindex]['tia'];
jtib = maps[jindex]['tib'];
jtianswer = maps[jindex]['tianswer'];
});
}
},
),
RaisedButton(
child: Text('下一题'),
onPressed: () {
if (jindex < maps.length - 1) {
jindex++;
setState(() {
jselected = '';
jtino = maps[jindex]['tino'].toString();
jticontent = maps[jindex]['ticontent'];
jtia = maps[jindex]['tia'];
jtib = maps[jindex]['tib'];
jtianswer = maps[jindex]['tianswer'];
});
}
},
),
],
),
],
),
);
// 选择题测试页面 (sdetail) 代码类似
TabBar tabBar = TabBar(
tabs: <Widget>[
Tab(icon: Icon(Icons.offline_pin), text: '判断题'),
Tab(icon: Icon(Icons.panorama_fish_eye), text: '选择题'),
],
labelColor: Colors.yellow,
);
TabBarView tabBarView = TabBarView(
children: <Widget>[
jdetail,
// sdetail,
],
);
DefaultTabController tabController = DefaultTabController(
length: 2,
child: Scaffold(
appBar: AppBar(
title: Text(getExamType(examNo)),
bottom: tabBar,
),
body: tabBarView,
),
);
return tabController;
}
}
```
### 6. 运行应用
在 IntelliJ IDEA 或 Android Studio 中运行应用，确保所有配置正确无误。
通过以上步骤，你可以完成实验室安全测试平台的应用程序开发。希望这对你有所帮助！
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