About ExtraLayoutSpace

1. ExtraLayoutSpace
of RecyclerView
kyobashi.dex #2
@amyu_san

2. ABOUT ME
▸ Name : Yuki Mima
▸ Twitter : @amyu_san
▸ github : amyu
▸ Work : Android App Engineer

3. Why do you use
RecyclerView

4. I can not be implemented
in the ListView

5. TEXT
The good point of RecyclerView
▸ Easy implementation of Animation
▸ Easy implementation of Animation
▸ Easy implementation of Animation
▸ Easy implementation of Animation
▸ Easy implementation of pre-load
▸ Easy implementation of Cache

6. TEXT
What is ExtraLayoutSpace
▸ The amount of extra space that should be laid out by
LayoutManager.

7. ExtraLayoutSpace = 0

8. https://www.youtube.com/watch?v=1xMNmMjqEbI

9. ExtraLayoutSpace =
Display Heigh

10. https://www.youtube.com/watch?v=4c7ZID7yjII

11. TEXT
How to implement
▸ Override the LinearLayoutManager#getExtraLayoutSpace
Returns the amount of extra space that should be laid out by
LayoutManager.
By default, LinearLayoutManager lays out 1 extra page of items
while smooth scrolling and 0 otherwise.
You can override this method to implement your custom layout
pre-cache logic.
protected int getExtraLayoutSpace (RecyclerView.State state)

13. Laying out invisible elements
will eventually come with
performance cost!

14. But it improves
user experience!!!!

15. Try to use!