Finally ANTLR(ANother Tool for Language Recognition) is on your Android device! The application is capable of generating lexer, parser, listener and visitor from a valid grammar, then you can use them to build virtually any language applications including configuration file reader, language translator, interpreter, compiler... It allows you to visualize a parser tree (just as what you saw on your pc) as well. Unleash your imagination and build your language application right in your palm. A big thanks to Terence Par for his awesome work on making ANTLR a wonderful tool! Please send me a bug report at redlee90@gmail.com, thanks!