Hi,

You are using a client version not supported by your server.
Please, check the changelog (https://www.lightstreamer.com/repo/m...CHANGELOG.HTML) and make sure that the client you choose has the statement “Compatible with Lightstreamer Server since XXX” where XXX is equal to or lower than you server version.

The exact server version is printed to the console during the startup. You should search a string like “Lightstreamer Server 7.0.0 build 1860”.

On on the Demos page of our site (https://demos.lightstreamer.com/) you can find examples of Android application. For instance see this demo (https://github.com/Lightstreamer/Lig...client-android) for a step by step tutorial.