Xamarin / MAUI

using Android.Bluetooth;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using TestXamConnections.Device;

using TestXamConnections.Services;

namespace TestXamConnections.Droid.Services

{

    public class BluetoothService : IBluetoothService

    {

        private readonly BluetoothAdapter bluetoothAdapter;

        public ObservableCollection<DeviceInfo> FoundDevices = new ObservableCollection<DeviceInfo>();

        public BluetoothService()

        {

            FoundDevices = new ObservableCollection<DeviceInfo>();

            bluetoothAdapter = BluetoothAdapter.DefaultAdapter;

        }

        public ICollection<DeviceInfo> GetBondedDevices()

        {

            ICollection<DeviceInfo> ret = new ObservableCollection<DeviceInfo>();

            foreach (BluetoothDevice bondedDevice in bluetoothAdapter.BondedDevices)

            {

                DeviceInfo toAddItem = new DeviceInfo

                {

                    MACAddress = bondedDevice.Address,

                    Name = bondedDevice.Name

                };

                ret.Add(toAddItem);

            }

            return ret;

        }

    }

}