Interact with the Application on the Android Device

1. Create a service connection.

Connecting to the first available peer found:

try {
  var agent = await Samsung.Sap.Agent.GetAgent(Samsung.Sap.Service.Profiles.First());
  var peers = await agent.FindPeers(null);
  if (peers.Count() == 0)
  {
    Console.WriteLine("There are no peers to connect to.");
  }
  else
  {
    var peer = peers.First();
    await peer.Connection.Open();
    peer.Connection.Send(agent.Channels.First().Value, System.Text.Encoding.ASCII.GetBytes("Hello"));
  }
} except (Exception exc) {
  Console.WriteLine("Communication failure: " + exc.Message);
}
Handling of an incomming connection:
Samsung.Sap.Agent agent = null;
agent = await Samsung.Sap.Agent.GetAgent("/my/profile", onConnect: con =>
  {
    if (con.Peer.ProfileVersion == agent.ProfileVersion)
    {
      con.DataReceived += (s, e) => {
        Console.WriteLine($"Received {e.Data.Length} bytes from {e.Peer.DeviceName}/{e.Channel.ID}");
      };
      return true; // accept connection from peers with the same profile version as ours
    }
    else
    {
      return false; // reject other connections
    } 
  });

2. Disconnect the service.

Connection between Peers can be closed by calling Connection.Close() method.

connection.Close();

3. Send a message.

In this sample text message is sent using Peer.SendMessage(). In contrast to sending data using Connection.Send() method establishing connection between Peers is not required.

await peer.SendMessage(Encoding.UTF8.GetBytes("Hello Message"));

4. Receive a message.

Receiving message from remote Peer is handled by OnMessage callback set before.

private async void OnMessage(Peer peer, byte[] content)
{
  string message = Encoding.UTF8.GetString(content) + " Time: " + DateTime.Now.ToShortTimeString();
  Toast.DisplayText(message);
  await peer.SendMessage(Encoding.UTF8.GetBytes(message));
}

In this case, app replies to a receiving command from remote Accessory Peer Agent in Smart device by providing the current time stamp.