New Views in Android L

A short talk about the new views in the L-preview for Android, that I gave at the Dutch Android User Group meetup (http://www.meetup.com/dutch-aug/events/191381302/) in Utrecht.

Transcript

1. New Views in Android L
2. RecyclerView API documentation: „A flexible view for providing a limited window into a large data set“
3. RecyclerView • Doesn't care about visual representation at all • Delegates this to helper classes
4. LayoutManager • Defines the placement of items • One predefined LayoutManager: – LinearLayoutManager
5. ItemDecorations • Defines how items are separated from each other • No default implementation • Called once per onDraw()
6. Animations • Defines the animations for addition, removal or the moving of items • One predefined implementation: – DefaultItemAnimator
7. Adapter • Defines what gets displayed and how one item is displayed • No default implementations • ViewHolder pattern
8. Adapter sample code
9. Activity Sample Code
10. CardView • Adds a border • Two customizations possible: – Radius of corners – Background color
11. What's to Like • Support Library • Animation Support • Everything is customizable
12. What's not to Like • Everything is customizable • Too few default implementations • No OnItemSelectedListener • Inconsistencies between source and API • CardView
13. Open Questions I • Is the API complete?
14. Open Questions II • Why ViewHolder?
15. Open Questions III • What about Loaders? • Are Loaders dead?
16. https://plus.google.com/+WolframRittmeyer https://www.twitter.com/RittmeyerW http://www.grokkingandroid.com http://www.grokkingandroid.com/l_preview_views