No, it supports web applications using Java, Python or Go.
App Engine uses the Java Servlet standard for web applications. You provide your app's servlet classes, JavaServer Pages (JSPs), static files and data files, along with the deployment descriptor (the web.xml file) and other configuration files, in a standard WAR directory structure. App Engine serves requests by invoking servlets according to the deployment descriptor.
Any other app server supports this kind of a migration
Does AWS or any of app engine can do it?
What I am looking for is to develop a server application using b4a object file (apk or any of its decompiled files) instead of writing real code of Java, PHP or whatever language that's normally being used when writing a web application.
Using more than one language for the web application & the mobile device application complicates coding & I would like to avoid that.