Recently I looked into continuous integration for Android applications, that I hosted on Github. After some research cloudbees.com caught my interest. Here I will shortly describe how to set this up in about 15 minutes.
Prerequisite: Cloudbees account. Also posible to use youre google account.
Github account with a public repository. Private is posible too, but will discus later.
Step one:
Setup your cloubees account and go to builds.
Step two:
Enter a job name and select “Build a free-style software project” and hit OK.
Step three:
Fill in the following:
At Source Code Management choose Git and enter you’re repository.
for example:
git://github.com/username/repository.git
At Build do the following:
Add build step and choose Execute shell.
Enter the following in the box:
#generate the local.properties file
rm -f local.properties
$ANDROID_HOME/tools/android update project --path ./
Then add another build step but this time choose:
Invoke Ant and enter the preferred ant builds. For now just type:
clean debug
Now on the right choose advanced and setup the build.xml file. Normally this is in the root of the project so enter there:
build.xml
//Side note If you have not configured your Android project for Ant build see the following website how to setup your project for ANT.
http://www.androidengineer.com/2010/06/using-ant-to-automate-building-android.html
Final step:
Then presse Apply and Save. This will bring you back to you’re job. Now all you have to do is choose build now and you are done! Take a QR code When the build is successful you can find back the debug .APK that Jenkins has generated, go to workspace and choose bin. project.APK. 
