The talk gives an introduction to automatic Android application builds with continuous integration servers. It shares ImmobilienScout24's best practices and experiences on this topic.

1. www.immobilienscout24.de
Continuously Break The
Android
GDG DevFest Berlin | 13.10.2011 | Hasan Hosgel

2. About me

3. Continuous Integration
In software engineering, continuous integration (CI) implements
continuous processes of applying quality control — small pieces of
effort, applied frequently. Continuous integration aims to improve the
quality of software, and to reduce the time taken to deliver it, by
replacing the traditional practice of applying quality control after
completing all development.
(source: http://wikipedia.org)
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

4. Reasons for Android
● faster iterations/ early response
● Error free compiling sourcecode on the SCM HEAD
● automated tests:
Unit
Integration
SmokeTest
Monkeyrunner
● using different hardware combinations
OS levels
density, resolution
● automated quality checks:
Lint, Findbugs, Checkstyle, PMD
Code coverage
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

5. CI Server Jenkins
● Needed software
Java development kit
Android development kit
Jenkins
● If you are using Ubuntu use a 32-bit installation and install Xvfb
(virtual frame buffer) for running the emulator
● For ant development  Ant
● For Maven development  Maven 3
● Install Android emulator Jenkins plugin
● SCM plugin
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

6. Using ant as buildingsystem
● You don‘t have an ant file?
android update project –p <path of the application project>
android update test-project -m <path of the application project>
-p <path of the test project>
● Create a free-style software project in Jenkins
● Configure SCM in Jenkins
● Configure your emulator (existing or create automatically)
● Add ant build step
missing dependency mamagement
official support
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

7. Using maven as buildingsystem
● You don‘t have a maven project?
http://www.androidbootstrap.com/
● Create a maven project in Jenkins
● Configure SCM in Jenkins
● Configure your emulator (existing or create automatically)
● Add maven commands
missing official support, is a XML-hell & complicated
dependency management & multi device support (install, run &
test)
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

8. Advanced & Best Practices
● Multi configuration (parameterised builds, matrix)
Different screen sizes
Different OS versions
Different packages, test size (annotations)
● Build chain (automatically) example
Compile
main OS version: unit- & integration test (package)*, static code
analyse & coverage
Multi configuration: unit- & integration test (package)*
package & sign
Release to SCM (not play store)[probably you want it manually]
* Using large test suites
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

9. What’s next?
Gradle
● Gradle is an experimental new Android SDK build system
http://tools.android.com/tech-docs/new-build-system
● Dependency management
● Make it easy to create several variants of an application, multi apk
distribution or different flavours of applications
● Filtering of resources & manifest (Maps key, signing, etc.)
● Actual version 0.2
a new build system
not finished yet (if you have knowledge, help the project!) 
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

10. Conclusion
Start continuous integration with a CI server
Write tests and run them automated
Continuously improve your work result & create amazing apps
Just do it! 
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

11. Dive Into Topic & Sources
● slideshare
http://www.slideshare.net/hosgel/continuously-break-theandroid
● Jenkins
http://jenkins-ci.org/
● Android Developer
http://developer.android.com/
● Maven Android plugin
http://code.google.com/p/maven-android-plugin/
http://www.androidbootstrap.com/
● Gradle
http://www.gradle.org/
http://tools.android.com/tech-docs/new-build-system
Continuously Break The Android | GDG DevFest Berlin | Hasan Hosgel

12. http://karriere.immobilienscout24.de
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