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Prototype project for using Maven to build a Scala Android project

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Maven Android Scala Prototype

This setup works. We use it with multiple clients.

Setup

  • Install JDK 1.5+.
  • Install the Android SDK.
  • Install Maven 3.0.3+.
  • Set the ennvironment variable $ANDROID_HOME to the path of your Android SDK.
  • Add $ANDROID_HOME/tools and $ANDROID_HOME/platform_tools to your $PATH.

Create Device

Choose whether you want to develop on a physical phone or an emulator.

Physical device

  • Just plug your device into your computer. If on Ubuntu, also see Troubleshooting section below.

Emulator

  • Launch the SDK Manager with android and install the "SDK Platform" under Android 2.2 ("Froyo"). Restart the SDK manager if prompted.
  • Launch AVD Manager with android avd and create an emulator using the default values and the target "Android 2.2 - API Level 8". Start the emulator.

Compile & Run on Attached Device or Running Emulator

$ git clone https://github.com/comb/maven-android-scala-prototype.git
$ cd maven-android-scala-prototype
$ mvn clean install android:deploy

Once that is done, open the app drawer on the emulator and launch the "Maven Android Scala Prototype" app.

Help

$ mvn android:help

Improvement

I'm trying to figure out how to:

  • Avoid running ProGuard during development mode
  • Reduce the jar search path to avoid all the duplicate jars that ProGuard wastes time on
  • Integrate ProguardCache (banshee/ProguardCache)
  • Introduce multiple modes, one for development and one for deploy
  • Specify the key to sign with

If you can do any of these things, please send me a pull request on GitHub.

Troubleshooting

Device permissions

On recent versions of Ubuntu you may get a permission denied error trying to develop with a physical phone. You will also see this in sbt:

 $ adb devices
 List of devices attached 
 ????????????    no permissions

To solve this problem, create the file /etc/udev/rules.d/51-android.rules and paste these contents:

SUBSYSTEM=="usb", SYSFS{idVendor}=="0bb4", MODE="0666"
SUBSYSTEM=="usb", SYSFS{idVendor}=="22b8", MODE="0666"
SUBSYSTEM=="usb", SYSFS{idVendor}=="18d1", MODE="0666"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="18d1", ATTRS{idProduct}=="0c01",
MODE="0666", OWNER="[me]"
SUBSYSTEM=="usb", SYSFS{idVendor}=="19d2", SYSFS{idProduct}=="1354", MODE="0666"
SUBSYSTEM=="usb", SYSFS{idVendor}=="04e8", SYSFS{idProduct}=="681c", MODE="0666"

Then run sudo service udev reload, unplug and replug the device, and things should work:

 $ adb devices
 List of devices attached 
 015A7A370900601C         device

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