Hide and show Floating button based on scrolling of RecyclerView.

hideShowFloatingbutton.java

import android.support.design.widget.FloatingActionButton;
import android.support.v7.widget.RecyclerView;

// View Declaration and initialization.
private FloatingActionButton floatingAddButton = view.findViewById(R.id.floatingAddButton);
private RecyclerView recyclerBookSeats = view.findViewById(R.id.recyclerBookSeats);

// Implementation of scrolling with Floating button hide & show.
recyclerBookSeats.addOnScrollListener(new RecyclerView.OnScrollListener() {
  @Override
  public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
    super.onScrolled(recyclerView, dx, dy);
    if (dy > 0 && floatingAddButton.getVisibility() == View.VISIBLE) {
      floatingAddButton.hide();
    } else if (dy < 0 && floatingAddButton.getVisibility() != View.VISIBLE) {
      floatingAddButton.show();
    }
  }
});