onPressed: () {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                          builder: (context) => ProtocolListScreen()),
                    );
                  },

//ProtocolListScreen need a parameter to move from home page to that screen but i don't want to as i have to put that key in every screen which is making difficulties

class ProtocolListScreen extends StatelessWidget {
  final BluetoothDevice polarDevice;
  final BluetoothDevice breathingDevice;
  // Constructor to accept Bluetooth devices
   ProtocolListScreen({
    Key? key,
    required this.polarDevice,
    required this.breathingDevice,
  }) : super(key: key);

trailing: TextButton(
                onPressed: () {
                  if (protocol['name'] == 'Anulom Vilom Pranayam') {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                        builder: (context) => AnulomVilomScreen(
                          polarDevice: polarDevice,  // ✅ Pass the device properly
                          breathingDevice: breathingDevice, // ✅ Pass the device properly
                        ),
                      ),
                    );
                  }
}

onPressed: () {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                          builder: (context) => ProtocolListScreen()),
                    );
                  },

//ProtocolListScreen need a parameter to move from home page to that screen but i don't want to as i have to put that key in every screen which is making difficulties

class ProtocolListScreen extends StatelessWidget {
  final BluetoothDevice polarDevice;
  final BluetoothDevice breathingDevice;
  // Constructor to accept Bluetooth devices
   ProtocolListScreen({
    Key? key,
    required this.polarDevice,
    required this.breathingDevice,
  }) : super(key: key);

trailing: TextButton(
                onPressed: () {
                  if (protocol['name'] == 'Anulom Vilom Pranayam') {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                        builder: (context) => AnulomVilomScreen(
                          polarDevice: polarDevice,  // ✅ Pass the device properly
                          breathingDevice: breathingDevice, // ✅ Pass the device properly
                        ),
                      ),
                    );
                  }
}

• flutter
• dart
• bluetooth-lowenergy

• 1 Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. – Community Bot Commented Feb 7 at 13:11

1 Answer 1

Your question is not clear, but I will give you a solution from the provided info.

You use provider package, You can create a dart class like this.

import 'package:flutter/material.dart';

class BluetoothDeviceHelper extends ChangeNotifier {
  late BluetoothDevice _polarDevice;
  late BluetoothDevice _breathingDevice;

  // Getters
  BluetoothDevice get polarDevice => _polarDevice;
  BluetoothDevice get breathingDevice => _breathingDevice;

  // Setters
  void setPolarDevice(BluetoothDevice value) {
    polarDevice = value;
    notifyListeners();
  }
  
  void setBreathingDevice(BluetoothDevice value) {
    breathingDevice = value;
    notifyListeners();
  }
}

IMPORTANT NOTES:

• Make sure you put your provider class above the screens in the widget tree (if you want to use it all over the app, it is better to put above MaterialApp() ) like this.

ChangeNotifierProvider(
  create: (BuildContext context) => BluetoothDeviceHelper(),
  child: MaterialApp(),
),

and you can use the values you want this way:

 Provider.of<BluetoothDeviceHelper>(context, listen: false).polarDevice;
 Provider.of<BluetoothDeviceHelper>(context, listen: false).breathingDevice;