What's new in Android ?

1. ConstraintLayout 
    This layout helps to make complex Android UI faster and with 
easiness.
Compatible : Above gingerbread (SDK 2.3)
    How to Add in your project ? :- follow this link ConstraintLayout
See more Working Like This

2. Multi-Window : Split Screen
Two apps can run side-by-side or one-above-the-other in split- 
screen mode.
Compatible : Above Nougat (SDK 7.0) 
How to use ? :- follow this link Example

3. Lambdas Expressions 
Lambda experssions simplifies programming.
Compatible : Above gingerbread (SDK 2.3)
    How to use ? :- follow this link Example
Download Project :- GitHub 

4. Firebase Library 
Firebase data is synchronized directly to client devices
Firebase Features:
1. User Authentication
2. Realtime Database
3. Static Hosting 
How to Add in your project ? :- Firebase
How to use ? :- follow this link Example