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1. What is Android? 1.1. The Android operating system Android  is an operating system based on the Linux kernel. The project responsible for developing the Android system is called the Android Open Source Project  (AOSP) and is primarily lead by Google. The Android system supports background processing, provides a rich user interface library, supports 2-D and 3-D graphics using the OpenGL-ES (short OpenGL) standard and grants access to the file system as well as an embedded SQLite database. An Android application typically consists of different visual and non visual components and can reuse components of other applications. 1.2. Task In Android the reuse of other application components is a concept known as  task . An application can access other Android components to achieve a task. For example, from a component of your application you can trigger another component in the Android system, which manages photos, even if this comp...