![]() ![]() this opens the database (and creates it if it doesn't exist) lazily instantiate the db the first time it is accessed only have a single app-wide reference to the database Static final DatabaseHelper instance = DatabaseHelper._privateConstructor() It contains methods to create a Database if not present, connect to the database, perform SQLite operations like query rows from table, update a row, delete a row, insert a row, etc.ĭbhelper.dart import 'package:flutter_sqlite_tutorial/car.dart' Database Helper ClassĬreate a Database helper Class as shown below. We shall use this class type to transfer data between UI (main.dart) and Database Helper Class. Under lib folder, create a file named car.dart with class as shown below.Ĭar.dart import 'package:flutter_sqlite_tutorial/dbhelper.dart' No need to mention the version number for the packages sqflite and path. dependencies:Īnd click on Packages get button on the top right corner of editor. Under dependencies section, below flutter property, add sqlite and path packages. When user provides the id and presses Delete button, the row shall be deleted, based on id, if present in the database table. In Delete Screen, we have a TextField to read id. You can go the View tab, press on Refresh button to see if the update happened. When user enters these fields and click update button, we shall update name and miles for the id provided. In Update Screen, we have three TextFields for reading id, name and miles from user. We have attached onChanged() method, so that, when user starts typing, it dynamically queries the table and shows the rows below the button in a ListView. In Query Screen, there is a TextField to get the name of the car from user. When you click on it, it queries all the rows and displays them in a ListView. Then when you click on the Insert button, we shall prepare the Car object through _insert() method of main() and call insert() method of Database Helper. In Insert Screen, we shall take car name and number of miles it has gone through TextField widgets. Our Application should be able to insert a row into the database, query rows, update a row or delete a row based on the required fields provided.įollowing example application contains a TabBar with TabBarView for operations Insert, View, Query, Update and Delete operations that we shall perform on the car_table. We maintain a car database where each car has an id, name and number of miles driven. In this tutorial, we shall learn basic SQLite operations with the help of a complete Flutter Application. Flutter - Navigate from one screen to another.Flutter - RaisedButton color property not working.Flutter GridView - Build GridView items dynamically.Flutter GridView - Spacing between Items.Flutter GridView - Set crossAxisCount based on width.Flutter Container - Margin at left, right, top, bottom. ![]()
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