Android代码-底部导航tab

Simple Bottom Navigation Motivation When using a TabLayout within your application, using a ViewPager along with an adapter offers an easy way to quickly link up your views for display. The FragmentAdapter class takes care of all the hard work for you when it comes to switching between the views as the user selected a different item in the TabLayout. This process is made up something a little like this: This is great as it allows you to decouple this presentation logic from your activities