Hello Giuseppe,
Thanks for your answer..

Actually, I noticed that I haven't been so clear. My project is a Android project. I really needed a full example of how Lightstreamer v.4.2.1 would be implemented in Android.

I'm using the follow
implementation 'com.lightstreamer:ls-log-adapter-java:1.0.1'
implementation 'com.lightstreamer:java-system-out-log:1.0.2'
implementation 'com.lightstreamer:ls-android-client:4.2.1'


Thansk again,
John.