This is the slides I created for my talk How Android API's evolved: Viewflipper vs ViewPager during Google Developer Groups Latin America summit.

1. How Android API’s
evolved
Powered by
0
jueves, 23 de enero de 14

2. Index
+ Who i am?
+ The problem
+
+ Demo
+ Resumen
+Q&A
1
jueves, 23 de enero de 14

3. Who i am?
2
jueves, 23 de enero de 14

4. Enrique Díaz
GDG AndroidTitlan founder
Android Hacker
3
jueves, 23 de enero de 14

5. The problem
4
jueves, 23 de enero de 14

6. The problem
5
jueves, 23 de enero de 14

7. Aha!
6
jueves, 23 de enero de 14

8. How we implement
HomeScreen-like
functionality?
7
jueves, 23 de enero de 14

9. ViewFlipper+ GestureDetector
+Animations
Lots of things to do here!
0. Create an object which extends from ViewFlipper.
1. In order to recognize gestures, we need an object which
extends GestureDetector.
2. Also we need gestureListener interface to recognize when
user has touched the screen.
3. From each XML file, we define 4 animations( left intro, left
outro, right intro, right outro ).
4. Create a class which extends from SimpleOnGestureListener,
then add business logic to start an animation based on fling
direction.
5. Last, we define a ViewFlipper element from XML which
contains layouts that gets animated based in business logic.
jueves, 23 de enero de 14
8

10. Demo
9
jueves, 23 de enero de 14

11. Yes, it hurts
Worse, it’s not
what i want
ed
10
jueves, 23 de enero de 14

12. Download the code
here:
https://github.com/nRike/
Swipe-with-ViewFlip--.git
11
jueves, 23 de enero de 14

13. How we implement
HomeScreen-like
functionality?
12
jueves, 23 de enero de 14

14. PageAdapter + ViewPager
Lots of fun to enjoy here!
0. We create a class which extends PageAdapter, then
assign the amount of existing elements to swipe and inflate
them.
1. Create an element in XML which extends from
android.support.v4.view.ViewPager.
2. Assign our PageAdapter to a ViewPager object in our
main Activity.
3. We create each resource through XML.
4. There’s no step 4.
13
jueves, 23 de enero de 14

15. Demo
14
jueves, 23 de enero de 14

16. Yes, it doesn’t
hurts
it is what i
wanted!
15
jueves, 23 de enero de 14

17. Download the code
here:
https://github.com/nRike/
SimpleViewPager.git
16
jueves, 23 de enero de 14

18. Q&A
17
jueves, 23 de enero de 14

19. Resume
0. Use the latest API
level, because there’s
lots of awesome API’s
to write less code and
DO MORE.
1. Simple is better.
2. Think users first and
last.
3. Keep calm and
Gagnam Style
jueves, 23 de enero de 14
18

20. How Android API’s
evolved
Thank you!
19
jueves, 23 de enero de 14