There are many good libraries available for Android developers on GitHub, but it's always a pain in the *ss to convert them to B4A, even with the available tools. Most people here start working on the conversion, but either give up before the project is finished, or don't follow up on the updates of the original project (yes, there are exceptions, I know...).
My wish is that we could integrate external libraries in an easier way, even if that means a bit of java code has to be inserted in the B4A source code...