This source will help the beginners to start build their own Android  apps  from scratch. By the end of this course you will be able to build real world android apps. In this course you will learn how to build and design secure android apps avoiding Android Vulnerabilities, and how to work with android layout tools to design very attractive and responsive layout that work with different device size, then you will learn how to use Sqlite as local database storage  and Mysql as remote database storage, Also you will learn about web services and map. And  you will learn how to work with android device persimmons and access to device information and device services. Then you will learn how use Firebase to build apps with Real-time database, monetize your app, and other services that offered by firebase. In this tutorial you will learn how to build real world apps and online games like Twitter, Tic Tac Toy, and Find my phone