In this blog, we are going to learn how we can Store data in Sqlite in flutter.
If you are creating an app that needs to store data in a database instead of a local file or key-value then use Sqlite.
In general, databases provide faster inserts, updates, and queries compared to other local persistence solutions.
Flutter apps can make use of SQLite databases via the sqflite plugin available on pub.dev.
Looking for the best Flutter app development?
Add Dependency
First, you need to add the sqflite package to your pubspec.yaml file and run flutter pub get to install it.
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dependencies: sqflite: ^2.0.0+3 |
Import the SQLite package in your Dart file:
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import 'package:sqflite/sqflite.dart'; import 'package:path/path.dart'; |
Create a class for your database and define the tables and columns you want to use:
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class DbManager { Database? _database = null; Future openDb() async { _database = await openDatabase(join(await getDatabasesPath(), "sqliteExample.db"), version: 1, onCreate: (Database db, int version) async { await db.execute( "CREATE TABLE person (id INTEGER PRIMARY KEY autoincrement, name TEXT, age TEXT)", ); }); return _database; } Future<int?> insertData(Model model) async { await openDb(); int? a= await _database?.insert('person', model.toJson()); return a; } Future<List<Model>> getDataList() async { await openDb(); final List<Map<String, dynamic>> maps = await _database!.rawQuery('SELECT * FROM person'); return List.generate(maps.length, (i) { return Model( id: maps[i]['id'], personName: maps[i]['name'], age: maps[i]['age']); }); } Future<int> updateData(Model model) async { await openDb(); return await _database!.update('person', model.toJson(), where: "id = ?", whereArgs: [model.id]); } Future<void> deleteData(Model model) async { await openDb(); await _database!.delete('person', where: "id = ?", whereArgs: [model.id]); } } |
In this example, we have created a table named “Person” with columns: “name”, and “age”.
Use the DbManager instance to perform operations on the database, such as inserting data, querying, updating, and deleting data.
Model class.
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class Model { int? id; String? personName; String? age; Model({this.id, this.personName, this.age}); Model fromJson(json) { return Model( id: json['id'], personName: json['name'], age: json['"age"']); } Map<String, dynamic> toJson() { return {'name': personName, 'age': age}; } } |
Check the below code to insert data in Sqlite Database by the user interface.
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class MyHomePage extends StatefulWidget { @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State<MyHomePage> { final DbManager dbManager = new DbManager(); Model? model; List<Model>? modelList; TextEditingController nameTextController = TextEditingController(); TextEditingController ageTextController = TextEditingController(); @override void initState() { super.initState(); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Sqlite DB In Flutter'), ), floatingActionButton: FloatingActionButton( onPressed: () { showDialog( context: context, builder: (context) { return DialogBox().dialog( context: context, onPressed: () async{ Model model = new Model( personName: nameTextController.text, age: ageTextController.text); int? id = await dbManager.insertData(model) ; print("data inserted ${id}" ); WidgetsBinding.instance.addPostFrameCallback((_){ setState(() { nameTextController.text = ""; ageTextController.text = ""; }); Navigator.of(context).pop(); }); }, textEditingController1: nameTextController, textEditingController2: ageTextController, /* nameTextFocusNode: nameTextFocusNode, ageTextFocusNode: ageTextFocusNode,*/ ); }); }, child: Icon( Icons.add, color: Colors.white, ), ), body: FutureBuilder( future: dbManager.getDataList(), builder: (context, snapshot) { if (snapshot.hasData) { modelList = snapshot.data as List<Model>?; return ListView.builder( itemCount: modelList?.length, itemBuilder: (context, index) { Model _model = modelList![index]; return ItemCard( model: _model, nameTextController: nameTextController, ageTextController: ageTextController, onDeletePress: () { dbManager.deleteData(_model); WidgetsBinding.instance.addPostFrameCallback((_){ setState(() {}); }); }, onEditPress: () { nameTextController.text = _model.personName??""; ageTextController.text = _model.age??""; showDialog( context: context, builder: (context) { return DialogBox().dialog( context: context, onPressed: () { Model __model = Model( id: _model.id, personName: nameTextController.text, age: ageTextController.text); dbManager.updateData(__model); WidgetsBinding.instance.addPostFrameCallback((_){ setState(() { nameTextController.text = ""; ageTextController.text = ""; }); }); Navigator.of(context).pop(); }, textEditingController2: ageTextController, textEditingController1: nameTextController); }); }, ); }, ); } return Center( child: CircularProgressIndicator(), ); }, ), ); } } class DialogBox { Widget dialog( {BuildContext? context, Function? onPressed, TextEditingController? textEditingController1, TextEditingController? textEditingController2, /*FocusNode? nameTextFocusNode, FocusNode? ageTextFocusNode*/}) { return AlertDialog( title: Text("Enter person Data"), content: Container( height: 100, child: Column( children: [ TextFormField( controller: textEditingController1, keyboardType: TextInputType.text, // focusNode: nameTextFocusNode, decoration: InputDecoration(hintText: "Enter person name "), /*autofocus: true,*/ onFieldSubmitted: (value) { //nameTextFocusNode?.unfocus(); //FocusScope.of(context!).requestFocus(ageTextFocusNode); }, ), TextFormField( controller: textEditingController2, keyboardType: TextInputType.number, //focusNode: ageTextFocusNode, decoration: InputDecoration(hintText: "enter person age"), onFieldSubmitted: (value) { // ageTextFocusNode?.unfocus(); }, ), ], ), ), actions: [ MaterialButton( onPressed: () { Navigator.of(context!).pop(); }, color: Colors.blue, child: Text( "Cancel", ), ), MaterialButton( onPressed:(){ onPressed!(); } /*onPressed!()*/, child: Text("Save"), color: Colors.blue, ) ], ); } } class ItemCard extends StatefulWidget { Model? model; TextEditingController? nameTextController; TextEditingController? ageTextController; Function? onDeletePress; Function? onEditPress; ItemCard( {this.model, this.nameTextController, this.ageTextController, this.onDeletePress, this.onEditPress}); @override _ItemCardState createState() => _ItemCardState(); } class _ItemCardState extends State<ItemCard> { final DbManager dbManager = new DbManager(); @override Widget build(BuildContext context) { return Padding( padding: const EdgeInsets.all(8.0), child: Card( child: Padding( padding: const EdgeInsets.all(8.0), child: Row( mainAxisAlignment: MainAxisAlignment.spaceBetween, children: <Widget>[ Column( crossAxisAlignment: CrossAxisAlignment.start, children: <Widget>[ Text( 'Name: ${widget.model?.personName}', style: TextStyle(fontSize: 15), ), Text( 'age: ${widget.model?.age}', style: TextStyle( fontSize: 15, ), ), ], ), Row( children: [ CircleAvatar( backgroundColor: Colors.white, child: IconButton( onPressed: (){ widget.onEditPress!(); }, icon: Icon( Icons.edit, color: Colors.blueAccent, ), ), ), SizedBox( width: 15, ), CircleAvatar( backgroundColor: Colors.white, child: IconButton( onPressed: (){widget.onDeletePress!();}, icon: Icon( Icons.delete, color: Colors.red, ), ), ) ], ), ], ), ), ), ); } } |
Output :
Conclusion :
Hope, this post gives you an idea about storing data in Sqlite in Flutter.
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Thank you !!