Initial work on more flexible and reusable tasks.

[marcusb]

Apology

This started as some small modifications to the plugin, but has grown more into a quasi-rewrite. So maybe submitting a pull request is not appropriate, but I want to point to some of the improvements that the plugin could benefit from.

Features

• Tasks are stand-alone, reusable and mostly free from assumptions about project details.
• Task inputs and outputs are correctly declared, allowing for up-to-date checking and skipping tasks when possible.
• Supports multi-project builds containing library projects and test projects, and manages the dependencies between them using native Gradle dependency configurations.
• Includes tasks for Emma coverage, Lint, AIDL, ProGuard, device tests...

  Usage hints

• The dependency from the main project to a library project is expressed with the special androidLibs configuration:

dependencies {
    androidLibs project(':facebook')
}

• The dependency from a test project to the main project is expressed with the special androidTest configuration in the test project:

dependencies {
    androidTest project(':main')
}

Notes

• This work started from a pre-1.0 version of the plugin, I have not tracked recent improvements upstream.
• I have not attempted to stay compatible with older SDK Tools releases, currently we are using it with tools r19 and Gradle 1.0-milestone-8a.
• My employer MBTE Sweden AB graciously allowed the changes to be published (Apache license).
• The documentation is now all wrong, I should supply some samples...

[jvoegele]

Hi, I'm interested in the refactoring you made here, but with such sweeping changes it's hard to tell if something won't break. Have you been able to do any testing to make sure the plugin still works for the various Android SDK releases?

Also, if I were to merge this pull request, it would be necessary to update documentation accordingly. Can you add doc updates to the pull request?

Thanks!