meincantor-app/lib/Settings.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'networking.dart';

class Settings extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text("Einstellungen"),
        ),
        body: ListView(
          padding: EdgeInsets.fromLTRB(20, 20, 20, 20),
          children: [
            Padding(
                padding: EdgeInsets.fromLTRB(0, 0, 0, 0),
                child: TextField(
                    decoration: InputDecoration(
                      icon: Icon(CupertinoIcons.lock),
                      border: OutlineInputBorder(),
                      labelText: 'API Key (POST /login)',
                    ),
                    onSubmitted: (String value) async {
                      SharedPreferences prefs = await SharedPreferences.getInstance();
                      String api_key = value;
                      print('Set new API key to $api_key');
                      await prefs.setString('api_key', api_key);
                    }
                )
            ),
            Divider(),
            buildClassesChooser()
          ],
        )
    );
  }
}