Database Helper Step #1

class DatabaseHelper {

  static Database _db;

  Future<Database> get db async {

    if (_db != null) {
      return _db;
    }

    _db = await initDatabase();
    return _db;

  }

  initDatabase() async {

    io.Directory documentDirectory = await getApplicationDocumentsDirectory();
    String path = join(documentDirectory.path, 'student.db');
    var db = await openDatabase(path, version: 1, onCreate: _onCreate);
    return db;

  }

  _onCreate(Database db, int version) async {
    await db
        .execute('CREATE TABLE student (id INTEGER PRIMARY KEY, nama_depan TEXT, nama_belakang TEXT, no_hp TEXT, gender TEXT, jenjang TEXT, hobi TEXT, alamat TEXT, email TEXT)');
  }
}