Presentation of the lightweight Android library named "Customer's Choice" at the GDG Android Berlin on the January 2013 Meetup

1. Customer's Choice
Let the users decide, which is the best
solution.

2. about me
Hasan Hosgel
Twitter: @alosdev
Github: alosdev
G+: Hasan Hosgel
Senior Developer
@ImmobilienScout24
Mobile enthusiast

3. Current Scenario
Product Management, Designer & Developer
has created a new screen with a button for an
Android application.
They can't decide on two Variants, which
position should be the button.

4. Current Scenario
possible button
positions

5. Current Scenario
They decide to make a user test with about six
participants.
=> NO explicit result
What now?!

6. Current Scenario
Already a published application in the
Playstore.
=> make a so called AB-Test
It is a Test on a live application, where
an amount of users get one variant
and the others another. Depending on
the success ratio you have now the
best fitting solution.

7. Development Part
Create switches depending on a business logic
and create a proprietary solution, which is not
reusable.
Republish the application and hope everybody
will update after the test to the final solution.

8. Here comes
Customer's Choice

9. Customer's Choice
a lightweight Android library for making simple
usability tests on a live application
https://github.com/alosdev/CustomersChoice

10. Usage
add the library (*.jar) to your project
CustomersChoice.getVariant("Variant name");
returns the chosen variant for the test and
reports the test start
CustomersChoice.reachesGoal("Variant name");
for reporting the goal
THAT'S ALL ;)

11. Does it crash?

12. No

13. Minor Problem: it returns
always variant 1

14. Configuration of Variants
● code
● JSON string in resources
● configuration file on the SD card
● configuration file in the network
For testing purpose over a Broadcast Intent
with overwriting.

15. Attributes for a Variant
● Name (required)
● startTime in Milliseconds
● endTime in Milliseconds
● spreading, int definition for ratio of
different Variants
{"variants":[{
"startTime": 768997,
"endTime": 3787789,
"spreading": [1,2,1],
"name": "Variant name"},
{...}
,...]}

16. Extensibility
You can write easily plugins for:
● Reporting
● Logging
Open Source

17. Live Coding-/
Demo time

18. Demo Application

19. Attention
make always clear
what and how to
report.
Also gaining the
results you need.
source: http://i.imgur.com/h2JClux.jpg

20. Q&A

21. Really Last Slide
● Repo: https://github.
com/alosdev/CustomersChoice
● Demo-Application
https://play.google.com/store/apps/details?id=de.
alosdev.customerschoice.demo
● Slides
http://slideshare.net/hosgel/customers-choice-
gdgandroidberlinjanuary