A simple note-taking app built in Flutter (inspired by Google Keep).

The goals of this project were:

  • to display a grid view of widgets of varying height depending on their content
  • to utilize SQLite within a Flutter app

Overview

  • Database is a simple singleton which loads the sqlite database (using sqflite) from disk on init. If the database doesn’t exist on disk, then it reads in a template from assets.
  • DatabaseUtils contains constants strings for insert, update, delete, select etc. sql queries.
  • The widget tree consists of only two screens, MainScreen and NoteScreen:
    • MainScreen displays a list of database entries represented as NoteTile’s. These widgets are staggered on screen using flutter_staggered_grid_view.
    • NoteScreen facilitates the editing of an note.
  • There is no shared state in this app. NoteScreen contains TextFields and is thus a StatefulWidget, while MainScreen is likewise a StatefulWidget so that it is automatically build after a pushed route is popped.

Remarks

  • The database was created using DB Browser for SQLite on macOS, however it could have been created in code using: 
    Database database = await openDatabase(path, version: 1,
  onCreate: (Database db, int version) async {
await db.execute(
    'CREATE TABLE Notes (id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE, title TEXT NOT NULL, contents TEXT NOT NULL)');
});
  • I suppose MainScreen needs to be stateful as if it was stateless, then there would be no reason to rebuild it after popping a pushed route.

Resources

flutter_staggered_grid_view

sqflite

This post was generated from a GitHub repository.