This plugin in deprecated. AndroidStudio 1.4 has this support built in.

AARLinkSources Plugin

The AARLinkSources Plugin is designed to attach sources for .aar dependencies in AndroidStudio.

Setup

buildscript {
    repositories {
        maven { url 'https://raw.github.com/xujiaao/mvn-repository/master/releases' }
    }

    dependencies {
        classpath 'com.github.xujiaao:aarLinkSources:1.0.0'
    }
}

Usage

apply plugin: 'aar-link-sources'