How to add java compiler options when compiling with Android Gradle Plugin?

Question

I have a build.gradle file with dependencies { classpath \'com.android.tools.build:gradle:0.13.3\'} and apply plugin: \'com.android.applicati

Answer 1

I found the following solution based on Gradle Plugin User Guide on Manipulating Tasks and Gradle DSL doc about JavaCompile:

Add to build.gradle:

preBuild {
    doFirst {
        JavaCompile jc = android.applicationVariants.find { it.name == 'debug' }.javaCompile
        jc.options.compilerArgs = ["-Xlint:unchecked"]
    }
}

The application variants are null during Gradle's configuration phase and the required JavaCompile task also doesn't exist, thus I do the modification in the execution phase instead.