This Library helps users to use Bottom Navigation Bar (A new pattern from google) with ease and allows ton of customizations GitHub地址：https://github.com/Ashok-Varma/BottomNavigation
A customizable welcome screen GitHub地址：https://github.com/stephentuso/welcome-android
A library that gives depth to Views GitHub地址：https://github.com/danielzeller/Depth-LIB-Android-
A Helper for SystemBar include StatusBar and NavigationBar. GitHub地址：https://github.com/H07000223/FlycoSystemBar
编辑个人资料，图片可拖拽排序。有点像可拖拽的gridView，但是会更流畅。这个demo是探探的个人资料编辑页面，受网上一位朋友的委托，该库模仿了其拖动效果。探探的安卓工程师，应该特别牛逼吧。因为最初时，这种拖拽效果真的无从下手。反编译探探的源代码，发现它做了很严肃的混淆处理。然后用Hierarchy Viewer看了View的层级，这才有了一点点的思路。在代码撰写的过程中，我也踩了不少坑。细看代
CircleIndicator for ViewPager GitHub地址：https://github.com/Modificator/CircleIndicator
CreditCardView is a rich UX custom view to accomodate Credit Cards / Debit Cards while handling payment systems. The library consists of GitHub地址：https://github.com/sharish/CreditCardView
Step indicator for onboarding or simple viewpager GitHub地址：https://github.com/badoualy/stepper-indicator
数字解锁 A clean, minimal, highly customizable pin lock view for Android GitHub地址：https://github.com/aritraroy/PinLockView