This Textbook Is About Learning Android And Developing Native Apps Using The Java Programming Language. It Follows Java And Object-oriented (oo) Programmers'' Experiences And Expectations And Thus Enables Them To Easily Map Android Concepts To Familiar Ones.each Chapter Of The Book Is Dedicated To One Or More Android Development Topics And Has One Or More Illustrating Apps. The Topics Covered Include Activities And Transitions Between Activities, Android User Interfaces And Widgets, Activity Layouts, Android Debugging And Testing, Fragments, Shared Preferences, Sqlite And Firebase Databases, Xml And Json Processing, The Content Provider, Services, Message Broadcasting, Async Task And Threading, The Media Player, Sensors, Android Google Maps, Etc.the Book Is Intended For Introductory Or Advanced Android Courses To Be Taught In One Or Two Semesters At Universities And Colleges.