Continuous Integration with Maven for Android apps

Continuous Integration (CI) with Maven for Android applicationsHugo Josefson @ GTUG Malmö 2011

Agenda● Whats the problem? ● Maven & CI – Dependency management – Dependency management – Developer / – Developer / Build server mismatch Build server mismatch – Running tests – Running tests● DEMO! – How to set up Android apps for Maven – How to set up Android tests for Maven – How to set up Continuous Integration

Whats the problem?

Whats the problem? - Dependency management• External jars • Hunt down the jars • Where to store them? (svn/git? non-optimal!) • What version was this jar? • What version of other dependency jars does it work with? – all handled manually

Whats the problem? - Dependency management• Inter-project dependencies • common library jar – our-common-lib.jar • several apk projects depend on it – MyApp1.apk – MyApp2.apk

Whats the problem?- Developer / Build server mismatch• Script vs IDE for building – Is the binary built the same way across developers and build servers?• Script vs IDE for testing – Is the binary tested the same way across developers and build servers?

Whats the problem? - Running tests• Common excuses – "I dont have time for tests before commit!" – "I cant be bothered with tests before commit!" – “I forgot...”• Regressions creep in...

What is Maven?• A build tool (and more: bit.ly/whatIsMaven)• Default directory structure – overridable• Plugins

Maven as Build Tool• Tell Maven: – My project is a jar / war / apk / ... – I need library jar commons-lang:2.5• Maven knows how to build that• Maven knows how to fetch libraries• (No need to specify directories, nor handle library jars)

MavenDefault Directory Structure

Maven Plugins• Built-in for core functionality – Building jar – Building war – JavaDoc – Running Tests – … lots more• Extra for e.g. building / testing / deploying apk – maven-android-plugin

Maven vs Dependency management• External jars → Dependency declaration <dependency> <groupId>commons-lang</groupId> <artifactid>commons-lang</artifactId> <version>2.5</version> </dependency>

Maven vs Dependency management• Inter-project dependencies → Dep. declaration – Example: morse-lib by Manfred Moser

Maven vsDeveloper / Build server mismatch• Solved when both use same build and test tool – Build server can use Maven – Developer can use Maven – Maven builds and runs tests in one go – Reproducible → Same build result

DEMO TIME!

How to set upAndroid apps for Maven [DEMO]

How to set upAndroid tests for Maven [DEMO]

How to set upContinuous Integration [DEMO] Jenkins + Android SDK Android Emulator Plugin Maven project

Maven Android resources Getting Started + discussion group: http://code.google.com/p/maven-android-pluginGoogle: maven android Questions?

Extra stuff(if time allows)

Robotium• Write UI tests for Android easily with Robotium – www.robotium.org – Standalone jar (Apache License 2) – Makes it easier to write instrumentation tests – Handles all the hard stuff: – Toasts, Context menus, Timing issues, following current Activity...

Robotium, contd...• Write UI tests for Android easily with Robotium – www.robotium.org – Use normal instrumentation test class, e.g. ActivityInstrumentationTestCase2 – Some Maven-enabled robotium-samples git clone --recursive git://github.com/jayway/robotium-samples.git

Multi-module projects• Share code & resources between Android apps – Share code + Java resources → Dependency to jar – Share Android resources → Dependency to apklib » ApkLib on maven-android-plugin wiki » libraryprojects/ in Samples (beta)

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Continuous Integration with Maven for Android apps

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