Generate JavaDocs with Android Gradle plugin

Question

How can I generate JavaDocs for an Android project using the new Gradle build system?

Here is what I have come up with but it doesn't work.

task generateJavadoc(type: Javadoc) {
    source = android.sourceSets.main.java.srcDirs
    ext.cp = android.libraryVariants.collect { variant ->
        variant.javaCompile.classpath.files
    }
    classpath = files(ext.cp) 
}

The main problem is that I do not get the appropriate android.jar on the classpath so some of the links in the JavaDocs are not resolved. I have to find a way to get all the necessary jars on the classpath.

Another problem with the approach I took is it collects the classpaths for all the build variants, rather than selecting one.

Answer 1

For Android gradle plugin 1.1.2+ (com.android.tools.build:gradle:1.1.2+)

libraryVariants - does not work anymore

use:

task javadoc(type: Javadoc) {
    source = android.sourceSets.main.java.srcDirs
    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
    destinationDir = file("../javadoc/")
    failOnError false
}

destinationDir = file("../javadoc/") - locate javadocs at root of project directory (in this way jenkins javadoc plugin could find it and show in special Document panel)

failOnError false - for suppress warnings that can cause fail build on jenkins