Android Secure Coding : building a secure smartphone society, timely feedback on a regular basis through the beta version, usage agreement of the guidebook, composition of the guidebook, using technology in a sage way, creating/using activities, receiving/sending broadcasts, creating/using content providers, creating/using services, using sqlite, handling files, using brow sable intent, outputting log to logcat, using webview, using notifications, how to use security functions, creating password input screens, permission and protection level, add in-house accounts to account manager, communicating via https, handling privacy data, using cryptography.