How to add -Xlint:unchecked to my Android Gradle based project?

Question

I tried to add the following to the root build.gradle file:

subprojects {
    gradle.projectsEvaluated {
        tasks.withType(Compile) {
              


        

Answer 1

I had a different compilation argument to set. The following works for me.

gradle.projectsEvaluated {
    tasks.withType(JavaCompile) {
        options.compilerArgs << "-XDignore.symbol.file"
        options.bootClasspath = "$System.env.JAVA_HOME/jre/lib/rt.jar"
    }
}

You have to set the boot classpath for JDK 1.8 and above for things like Unsafe and sun.swing.* classes. Fix the source code especially for the latter, because Jigsaw Java 9, the up and coming modularity implementation for the JRE, will finally make these methods inaccessible(!). Consider yourself warned.