(The rapid development of mobile communication equipment, represented by mobile phones, has brought a revolutionary impact on the way people produce. From the "Big Brother" with single function and analog signal in the early 1990s to the industry's top iPhone 4, which represents the comprehensive design and use level of smart phone terminals, all show the strength of technology and business. The driving force of this change is, in the final analysis, the unremitting pursuit of freedom and openness - freedom of technology and openness of business - so that more people can join in the development field of this huge potential smartphone business. The colorful mobile phone operating system platforms and various kinds of software brought about by this have brought you more prosperity and rich user experience. And the Android mobile phone operating system is the representative of this open platform. Its short history of five or six years of pre development has caused Apple enterprises a great headache. They have to send Steve Jobs to God to seek help, let alone the futile struggle of Nokia and other conformists. Former industry leaders, such as Samsung and Motorola, have finally found a weapon against Apple and flocked to it. It is true that Android now has a great influence by virtue of Google's "Open Mobile Alliance", because its openness has now filled all aspects of daily life. With the further spread of Android devices, due to its scalability and easy to carry characteristics, Android intelligent end rules are quickly integrated into the day, and even can be seamlessly connected with microblog, Facebook and Twitter. Especially in the field of mobile health monitoring, a series of emerging industries, such as special mobile phone accessories and use services, have gradually emerged. If we can combine the rapid development of cloud computing, we believe it will be a good time to create a new industrial growth point. In recent years, the translator has also had the honor to participate in a series of related research and manufacturing industries. He knows the joys and sorrows of this period, so he is willing to introduce this book to readers to welcome the new IT industry revolution.)