(The "Android Development Script" written by BRILLIANT SERVICE Co., Ltd. is divided into 6 chapters. Chapter 1: Introduction to Android, which introduces the basic information about Android development. Chapter 2 is a rudimentary application development script. This chapter begins to introduce the basic knowledge you must know and know when developing Android applications, and explains the unique functions of Android such as Activity and Intent, as well as the technologies needed to use them. Chapter 3 Use the Practice Script of Program Development. This chapter will guide readers into the world of Android application development. From the technology necessary for developing user programs using OpenGL, azimuth information and sensors, to optimizing the use of user programs. Chapter 4 Native Code Secrets explains the skills of developing Android user programs using native code. From building the development environment to the unique libc (bionic) of Android, the technology required for deeper development is introduced. Chapter 5 Customized Secrets introduces the secrets of using Android source code sensitively. From the environment for compiling source code to the overview of source code and the transformation of the framework, readers can experience the advantages and interests of exploring open source code. Chapter 6 Debugging Secrets introduces very effective techniques for debugging Android programs. Android Development Secrets is suitable for Android programmers, Android enthusiasts, and developers with some practical experience. This document includes the following annexes:)