Hi, by just following your readme nothing happens when I add one of your ItemAnimators. Is there maybe documentation missing?

Is it necessary to set a duration? Is it necessary to always call notifyItemInserted() or notifyItemRemoved()?

I really loved this repo but I struggled a lot with it.
Unclear documentation and a very hard samples (specially for some one new to android dev)
You should check them and more easer samples

In my app I need to modify the drop position. If the item is hovering over position X, I need to say that the item will really drop in position Y, and have item Y open up so that it's visually clear to the user that this will happen.

iOS UITableView supports this with this delegate method.

JavaDoc for addItem()/addItems() states that when passing a negative position it will be appended to the end. On eu.davidea:flexible-adapter:5.1.0 you got following annotation
@IntRange(from = 0) which prevents passing negative positions

I don't know how in pre-layout determine an appearing views, which are going to be moved to visible bounds. Detailed description provided on stackoverflow

In navigation drawer when user click on any specific menu then that menu should be shown selected
How do we do this by using your library...??please help me to figure out this solution.