B4J Question Best Communication Method between Android and Desktop App

[dieterp]

I want to develop a B4J app that will receive a request and then perform a key press event through code. The request will be sent via a B4A app. I understand that I can use an API to post the request from the B4A app and then have the B4J app get the response, but there will be a delay of maybe 2-3 seconds and I'm trying to get the process as instant as possible.

Is there a quicker way for the B4A app to connect/communicate with the B4J app so that there won't be any delay?

 

[Xfood]

try to take a look here

[example] [B4X] Control the desktop with your phone

This example shows how simple it is to create network solutions with B4J, B4A and B4i. In this case the network communication is based on UDP. It implements a remote desktop mouse, where the Android device or iOS device control the desktop mouse. The B4J app uses jAWTRobot library to control...

www.b4x.com

 

[dieterp]

Thanks. Much appreciated!

 

[emexes]

UDP

Although, from memory, it's not guaranteed. But in practice, on working networks, I've never had a problem yet.

It is included with both B4A and B4J (probably B4I and B4R too) so there's no (additional separate) API.

 

[emexes]

Network Time Protocol uses UDP, so it must be good.

 

[MicroDrie]

As long as you realize that UDP is a sessionless protocol, where speed and efficiency are more important than perfect reliability: there is no control over the correct arrival of the sent packets.

 

[emexes]

there is no control over the correct arrival of the sent packets.

in practice, on working networks, I've never had a problem yet.

Those reliability and out-of-order issues only seem to happen when packets travel across the stormy medium of the internet.

Across local networks - and probably any situation where there are not multiple paths - I have found that UDP works just great.

But if the phone is working via mobile phone internet, then sometimes a packet will take the scenic route or be otherwise delayed.