... handlers. An event handler is a way of saying, “When this happens, the app does this.” In a traditional language like Java, you have to un-derstand classes, objects, and special objects called ... While Driving” app; two communications majors created “Android, Where’s My Car?”; and an International Studies major created the “BroadcastHub” app (Chapter 11). When an art major knocked on ... visual blocks language for implementation on Android uses the Kawa Language Framework and Kawa’s dialect of the Scheme programming language, developed by Per Bothner and distributed as part...