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Fabian Reyes
Asked: 2020-10-23 13:54:35 +0800 CST 2020-10-23 13:54:35 +0800 CST

Load data without Future Builder - Flutter

  • 772

I want to load the data saved in a SQlite database into Flutter. I don't want to use the FutureBuilder method since it generates a widget and what I need is to do some validation procedures.

I am using the code:

Future cargarcarros() async {
    final carros = await DBProvider.db.getTodosVehiculos();

    for (int i = 1; i <= carros.length; i++) {
      final db = await DBProvider.db.getVehiculoId(i);
      String placanumero = db.placa.replaceAll(RegExp(r'[a-zA-Z]'), "");
      String ultimo = placanumero.substring(placanumero.length - 1);
      //shownotification(db.placa);
      return print(ultimo);
    }
{
  }

This code only returns the first value of the list of items from the database.

How can I manage to load all the items and make the iteration work correctly.

flutter

1 Answers

  1. Best Answer

    If you don't want to use FutureBuilderor Streams, you can do it the easiest way with StatefulWidget.

    Assuming you're inside the State class of the StatefulWidget :

    void cargarcarros() async {
    final carros = await DBProvider.db.getTodosVehiculos();
    listado.clear();
    for (int i = 1; i <= carros.length; i++) {
      final db = await DBProvider.db.getVehiculoId(i);
      String placanumero = db.placa.replaceAll(RegExp(r'[a-zA-Z]'), "");
      String ultimo = placanumero.substring(placanumero.length - 1);
      //shownotification(db.placa);
      listado.add(ultimo);
    }

print(listado);
    //con esto refrescas tu widget , ahora podrás usar la variable `listado` 
    setState((){
});
}

final listado = List<String>();
    • 1