Why are some views inside the legacy tab in Android Studio 3.1 and what replaces them?

Question

I\'ve updated my Android Studio to 3.1 stable channel. I\'ve noticed that \"All\" tabs in palette window are removed and \"Legacy\" tab is introduced. That tab contains the foll

Answer 1

ListView - replaced with RecyclerView

TabHost - replaced with TabLayout

RelativeLayout - replaced with ConstraintLayout

GridView - replaced with ConstraintLayout

Mostly due to the new ones having better performance.

RecyclerView.Adapter has implemented the popular and recommended holder pattern and supports modern layout transitions. It also accepts a layout manager allowing you to easily implement a grid.