Customer’s Choice is a AB-Test library for Android. Unlike the Amazon’s offer, you can use it in every productive application, configure it freely and it’s easily extensible. It is provided as an Open Source library that can be used within any Android project. The slides will be an introduction into the library and will present a Demo for showing the practical usage of Customer’s Choice.

1. www.immobilienscout24.de
Customer‘s Choice
Let the user decide, which is the best solution
moosecon | 07.03.2013 | Hasan Hosgel

2. About me
Hasan Hosgel
Twitter: @alosdev
Github: alosdev
Google+: Hasan Hosgel
Slideshare: hosgel
developer @ ImmobilienScout24
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel

3. Agile Scenario
The Product Owner defines following user story:
„As a user I want to purchase the products on a
shopping card with a click on a button.“
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel
Source: http://www.flickr.com/photos/europedistrict/4292951182/

4. First design
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5. Design Variants
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6. User Test
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7. User Test Results
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8. What now?
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9. What now?
What do we normally in the web?
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10. Make an AB-Test
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11. AB-Test for Android
You have an application, which is probably publicly
available.
Send an amount of users to another variant than the
normal one.
 Depending on success ratio you have the best
suiting solution.
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel

12. The Development
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Source: http://www.flickr.com/photos/geminidustin/275375865/ moosecon 2013 | Customer‘s Choice | Hasan Hosgel

13. Developer’s Todo List
● Create switches depending on the business logic
● Create a proprietary solution
Not reusable
● Publish application
Waiting for the results
● Remove switches and republish application
Waiting that everybody updates to the new version
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel

14. Smarter Solution
The library Customer’s Choice
with a common approach

15. Customer’s Coice
A lightweight Open Source Android library making
simple AB-Tests in an application, which can be
configured over the network.
Possible AB-Tests variants:
● For layouts and positions
● For colors
● For workflows
● For texts
https://github.com/alosdev/CustomersChoice
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel

16. Usage
● Add the library (*.jar) to your project
● Configure your switch based on the variant
CustomersChoice.getVariant(context,“VariantName”);
● When you reach your expected goal, report it
CustomersChoice.reachesGoal(“VariantName”);
● done
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17. Usage
● Will an exception be raised?
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18. Usage
● Will an exception be raised?
No
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel

19. Usage
● Will an exception be raised?
No
● Will it have full functionality?
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel

20. Usage
● Will an exception be raised?
No
● Will it have full functionality?
Not really
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moosecon 2013 | Customer‘s Choice | Hasan Hosgel

21. Usage
● Will an exception be raised?
No
● Will it have full functionality?
Not really
● Why?
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22. Usage
● Will an exception be raised?
No
● Will it have full functionality?
Not really
● Why?
It is not configured, therefore #getVariant(String) will
always return variant 1 for the given variant name
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23. Configuration of Variants
● Through code
● JSON String in resources
● Configuration file on SD card
● Configuration file in the network with standard caching
mechanism, like Etag- and Modified Since Header
● For testing purposes you can overwrite a variant with a
broadcast intent
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24. Variant’s Attributes
● name: String (required)
● startTime: Integer in Milliseconds
● endTime: Integer in Milliseconds
● spreading: Integer array for ratio of different variants
● reset: Boolean for resetting the current value
{“variants”:[{
“name”:”VariantName”, “startTime”:768997,
“endTime”:1022222, ”spreading”:[1,2,1],
“reset”:true}, {…}
,…]}
Global Attribute: resetAll – reset all variants
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25. Extensibility
You can write custom plugins for:
● Logging
● Reporting
You can fork the library on Github, make your changes and
send a pull request.
https://github.com/alosdev/CustomersChoice
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26. Demo time
Showing code samples

27. Demo Application
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28. Attention
Always make clear
what and how to
report for gaining the
results you need.
Otherwise you can get
a comparison like the
diagram.
source: http://i.imgur.com/h2JClux.jpg
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29. Q&A
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30. www.immobilienscout24.de
Thanks for your attention!
We are hiring!
Contact:
Hasan Hosgel Customer‘s Choice
Twitter: @alosdev Repo: https://github.com/alosdev/CustomersChoice
Github: alosdev SlideShare: http://de.slideshare.net/hosgel/moosecon-2013-customerschoice