flutter: # ... assets: - assets/database.db In your app, you'll have to copy the asset file into "documents". This is slightly complicated. // Construct a file path to copy database to Directory documentsDirectory = await getApplicationDocumentsDirectory(); String path = join(documentsDir...
Future<Database> createDatabase() async {// 获取数据库路径final path = await getDatabasePath('my_db.db');// 打开数据库final database = openDatabase(path,version: 1,// 当数据库第一次被创建时,执行创建表的操作onCreate: (db, version) {return db.execute("CREATE TABLE my_table(id INTEGER...
// 获取本地SQLite数据库vardatabasesPath =awaitgetDatabasesPath();Stringpath = join(databasesPath,"demo.db");// 删除数据库awaitdeleteDatabase(path);// 打开数据库Database database =awaitopenDatabase(path, version:1, onCreate: (Database db,intversion)async{// 当打开数据库的时候创建一张表awai...
SQLite is a lightweight, embedded database that is perfect for mobile applications. Flutter, a popular framework for cross-platform app development, provides excellent SQLite support through packages like sqflite. This guide explores how to integrate SQLite into Flutter projects, perform CRUD operations...
1.Setup Flutter Project预览12:09 2.Setup Material Route预览12:44 3.App Navigation and TextFormField预览12:50 4.Extract TextFormField Widget预览10:23 5.Setup Date Picker11:59 6.Custom Date Format.mp405:26 7.Refactor Date Picker Form Field07:16 8.Create Database Table04:10 9.Create Data...
dependencies: flutter: sdk: flutter sqflite: ^2.0.0+4 # 确保版本号是最新的 添加依赖后,运行flutter pub get命令来安装依赖。 创建一个SQLite数据库实例: 使用sqflite插件提供的openDatabase方法来打开或创建一个数据库。例如: dart import 'package:path/path.dart'; import 'package:sqflite/sqflite.dart...
在Flutter中,可以将SQLite .db文件放置在应用程序的本地文件系统中。具体来说,可以将.db文件放置在应用程序的assets目录中,然后在应用程序启动时将其复制到设备的本地文件系统中。 以下是完善且全面的答案: Flutter是一种跨平台的移动应用开发框架,它允许开发者使用单一代码库构建高性能、美观的移动应用程序。在F...
在上述代码中,我们定义了一个getMyDataFromDB函数,它接受一个Database对象,并返回一个MyData对象的列表。我们首先调用queryAll函数来获取所有数据,然后使用List.generate方法来生成一个MyData对象的列表。在生成列表的过程中,我们从每个Map中获取id和name字段,并创建一个新的MyData对象。 7. 更新数据 7.1 更新数据...
One thing I did not like about scheme management in Flutter is that it was all written using string constants and then supplied to the database. It was definitely not readable and actually confusing to someone like me that always seems to struggle with SQL in general. For that reason I als...
SQLite基础语法速用大法(Flutter) 前记 (可跳过这段来自本up的罗里吧嗦。。。) 在做上一个项目的时候,需要用到本地数据库,以前做公司项目用的是轻量级数据库Realm,做自己小项目用的是greenDAO,大学学的是SQL server,但是在flutter中,相关插件用的数据库是SQLite(sqflite插件),但本人还没接触过SQLite,问了后台...