收集整理Android开发所需的Android SDK、开发中用到的工具、Android开发教程、Android设计规范，免费的设计素材等。
A very beautiful and easy to use app: "SmsCodeHelper" (verification code helper), light, open source, it can automatically copy the code to the user's clipboard, when the user receives the message verification code. Material Design and open source: http://fir.im/codehelper (or Google Play "SmsCodeHelper")
