RubyMotion for Android features a completely new Ruby runtime specifically designed and implemented for Android development. This is a new implementation of the Ruby language, it does not share code with RubyMotion for the Objective-C runtime. We are using the RubySpec project to make sure the runtime behaves as expected.
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We feature an LLVM-based static compiler that will transform Ruby source files into ARM machine code. The generated machine code contains functions that conform to JNI so that they can be inserted into the Java runtime as is.
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RubyMotion Android apps are packaged as .apk archives, exactly like Java-written apps. They weight about 500KB by default and start as fast as Java-written apps.
http://blog.rubymotion.com/post/87048665656/rubymotion-3-0-s...
