Xamarin / MAUI

using Android.App;

using Android.Content;

using Android.OS;

using Android.Runtime;

using Android.Views;

using Android.Widget;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using TestXamConnections.Models;

using TestXamConnections.Connection;

using TestXamConnections.Droid.Receivers;

using TestXamConnections.Helper;

namespace TestXamConnections.Droid.Connection

{

    /* Classe permettant d'établir une avec une applications tiers

     * Pré-installée sur l'appareil

     * Basée sur filtrage d'intent sur BroadcastReceiver

     */

    public class InternConnectionService : IConnectionService

    {

        public EventHandler<byte[]> DataReceivedEvent { get; set; }

        public EventHandler<string> ConnectionFailedEvent { get; set; }

        private readonly IntentReceiver intentReceiver;

        private readonly Context appContext;

        /* La fonction connect dans le cas du connexion en interne

        *  Est en fait, la configuration de l'IntentReceiver

        */

        public async Task Connect(Dictionary<string, string> param)

        {

            if (param.ContainsKey(ConnectionConstants.RECEIVABLE_INTENTS_KEY))

            {

                // Récupérations des intents recevable

                List<string> intents = new List<string>();

                intents.AddRange(param[ConnectionConstants.RECEIVABLE_INTENTS_KEY].Split(","));

                // Ajout des intents recevable au IntentFilter

                IntentFilter intentFilter = new IntentFilter();

                intents.ForEach(intent => intentFilter.AddAction(intent));

                await Task.Run( () => appContext.RegisterReceiver(intentReceiver, intentFilter) );

            }

            else

            {

                ConnectionFailedEvent.Invoke(this, null);

            }

            return;

        }

        public Task<bool> SendCommand(string command)

        {

            Intent launchIntent = appContext.PackageManager.GetLaunchIntentForPackage(command);

            if (launchIntent != null)

            {

                appContext.StartActivity(launchIntent);

                return Task.FromResult(true);

            }

            return Task.FromResult(false);

        }

        public InternConnectionService()

        {

            intentReceiver = new IntentReceiver();

            intentReceiver.OnIntentReceived += IntentReceived;

            IntentFilter intentFilter = new IntentFilter();

            appContext = Application.Context.ApplicationContext;

        }

        private void IntentReceived(object sender, Intent recIntent)

        {

            switch (recIntent.Action)

            {

                case AgridentConstants.ACTION_AGRIDENT_SUCCESS:

                    string readData = recIntent.GetStringExtra(AgridentConstants.KEY_BARCODE_DATA);

                    DataReceivedEvent.Invoke(this, Encoding.ASCII.GetBytes(readData));

                    break;

                case AgridentConstants.ACTION_AGRIDENT_ERROR:

                    DataReceivedEvent.Invoke(this, Encoding.ASCII.GetBytes("ERROR"));

                    break;

                default:

                    break;

            }

        }

        public Task<bool> SendCommand(byte[] hexValues)

        {

            throw new NotImplementedException();

        }

    }

}