These are the slides of the talk given during the Confoo 2012 conference. For building an Android app from inside the IDE, Google provides with ADT, an Eclipse plugin to create emulators , compile your code, run the tests, package it and deploy it to a device. Reading this presentation, you will learn how to all those steps in a "headless"way, outside the IDE, so that tools such as Jenkins / Hudson or even Travis-CI can build and test your applications. Also, this presentation introduces to the reader the concept of Continuous Quality Control with Sonar and Continuous Deployment with Nexus : possible even for Android apps now !

1. 29/2/2012
Continuous Integration for Android Apps
Anthony Dahanne, Eng.
@anthonydahanne
http://blog.dahanne.net

2. @anthonydahanne 2
Continuous Integration for Android Apps
Getting to know each other ...
Work @compuware on a APM software based on
OSGi and Equinox
Develop an open source app on Android,
ReGalAndroid
Work on Continuous Integration (contribute to tools
such as Maven Tycho, m2e-android)

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Continuous Integration for Android Apps
Continuous Integration for Android Apps
A gentle introduction to Continuous Integration
Building an Android app
Testing an Android App
Setting up a CI tool for Android development
Going further than CI...

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Continuous Integration for Android Apps
A gentle introduction to Continuous
Integration (CI)

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Continuous Integration for Android Apps
A gentle introduction to CI : what is it ?
“the practice of frequently integrating one's new or changed
code with the existing code repository” Wikipedia
Each code change triggers a new build of the software
Each build should be working (not broken)
CI jobs occur on dedicated machines running CI tools such as
Hudson/Jenkins/CruiseControl/Bamboo/TravisCI

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Continuous Integration for Android Apps
A gentle introduction to CI : benefits ?
Coding within a team,
makes sure no one commits broken code
makes it easy to get the latest good build
And more generally
Eases the distribution of your software
Shows the quality and robustness of your code

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Continuous Integration for Android Apps
Building an Android app

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Continuous Integration for Android Apps
Building an Android app

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Continuous Integration for Android Apps
Building an Android app

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Continuous Integration for Android Apps
Building an Android app : outside the IDE
ADT exists for each major platform (Win, Linux, Mac)
The IDE integration is only (officially) provided for Eclipse
For Continuous Integration, we want to :
Build outside the IDE,
Build on the command line, so that a CI tool can run the
build

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Continuous Integration for Android Apps
Building an Android app : the choices
In the Java world, the main build automation tools are Ant and
Maven (equivalent of make in the C world)
Apache Ant
Appeared in 2000
Very versatile
Still very popular
Apache Maven
Convention over configuration
Build lifecycle
Dependencies management

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Continuous Integration for Android Apps
Building an Android app : with Ant
Ant is the official building tool chosen by the ADT team
The Ant script can be generated and used easily from an
Android project :
> android update project --path ./
Updated local.properties
Added file ./build.xml
Updated file ./proguard.cfg
> ant debug install
[…]
BUILD SUCCESSFUL
Demo : generate an ant script
to build your project

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Continuous Integration for Android Apps
Building an Android app : with Maven
Maven privileges “convention over configuration”
It is extensible via plugins (eg : android-maven-plugin !)
Project dependencies are fetched and cached
It provides a default execution lifecycle (you can bound a
plugin execution to each phase of the lifecycle)

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Continuous Integration for Android Apps
Building an Android app : with Maven
compilerplugin
compile
surefire plugin
test
validate
compile
test
package
integration-test
verify
install
deploy
deploy plugin
deploy
The“default”lifecycle
This schema is taken from Fabrizio Giudici
“Building Android Apps with Maven” slides

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Continuous Integration for Android Apps
Building an Android app : with Maven
2 ways to get started with a Maven enabled Android project :
Start from scratch with android archetypes :
Copy and adapt an existing pom.xml
> mvn archetype:generate
-DarchetypeArtifactId=android-quickstart
-DarchetypeGroupId=de.akquinet.android.archetypes
-DarchetypeVersion=1.0.7
-DgroupId=your.company
-DartifactId=my-android-application
> cd my-android-application
> mvn install android:deploy android:run
Demo : generate a Maven pom
to build your project

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Continuous Integration for Android Apps
Building an Android app : with Maven
commons-gallery
ReGalAndroid app
g2-java-client
g3-java-client
jiwigo-ws-api
commons-io
httpclient
json
httpclient
httpmime
commons-lang
httpcore
commons-logging
commons-codec
(transitive)
dependencies

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Continuous Integration for Android Apps
Building an Android app : which one to choose ?
The Ant script
Is generated by ADT but
Does not deal with dependencies (must copy to lib/)
And is not easily extensible
The Android Maven Plugin
Covers all android specific build steps (proguard, etc...)
Is integrated in the Eclipse IDE (thanks to m2e-android)
Leverages existing Maven plugins (deploy, replace,etc...)

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Continuous Integration for Android Apps
Testing an Android app

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Continuous Integration for Android Apps
Testing an Android app
Outside an emulator :
Externalize your logic in plain jars
Use an “Android Mocker” (robolectric)
Inside an emulator
Integration testing : tests run in a real device (robotium
helps !)

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Continuous Integration for Android Apps
Testing an Android App
ReGalAndroid app
ReGalAndroid Integration tests
1. Install the app
2. Install the test app
3. run the app and run the test app
Demo : running ReGalAndroid
integration tests

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Continuous Integration for Android Apps
Setting up a CI tool for Android
development

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Continuous Integration for Android Apps
Setting up a CI tool
As long as the CI tool supports Maven it should work
Environment must be set up
PATH + JAVA_HOME, M2_HOME, ANDROID_HOME set
Download the SDK and :
> android update sdk --no-ui --obsolete –force
(be careful >2GB as of January '12)
> android update sdk --no-ui -t platform –force
(just the Android platforms, no samples, no addons, no extras...)
> android update sdk --no-ui -t platform-tools –force
(Android platform-tools : aadt, adb, etc...)
> android create avd -n 23 -t 9 -c 16M -b armeabi
(to create an AVD/Emulator)

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Continuous Integration for Android Apps
Setting up a CI tool : case of a server (not GUI)
Android Emulator
Is needed for the integration tests
But needs an X server !
Hudson/Jenkins Xvnc plugin to the rescue !
Or, even better, Hudson/Jenkins Android Emulator PluginDemo : a Jenkins job building
an android app

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Continuous Integration for Android Apps
Going further than Continuous Integration

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Continuous Integration for Android Apps
Going further than CI : continuous quality control
At each build, check :
The tests run
Code coverage of the tests
Quality metrics of the tests, with Checkstyle, Findbugs,
PMD /CPD
Sonar does it all !
Quality dashboard of your projects
Provides : timeline, rules, diagrams, high level views, etc.

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Continuous Integration for Android Apps
Going further than CI : continuous deployment
At each build (or milestone / nightly builds)
Deploy to a an archive repository (such as Nexus)
Use some tooling to push to devices ?

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Continuous Integration for Android Apps
Thank you …
Now please vote
and react on https://joind.in/6032 !
Art
The template used for this presentation was the LibreOffice Presentation Template 1.0
The Android pictures belong to Google http://tools.android.com/overview
Tools, documentation, useful blogs for Android development and CI
Documentation on the Android Maven Plugin can be found reading the
Maven Reference Book
Updating Android SDK from the command line
Manfred Moser's blog
Using Android Maven Artifacts
See a device screen on your computer : Droid@Screen
Use Hudson/Jenkins or try TravisCI out, for CI Sonar, to check on your code quality , and
Nexus as an artifact repository manager