How to set custom Java compiler args on an Android project?

Question

I'm putting the following at the end of my project gradle file:

gradle.projectsEvaluated {
 tasks.withType(JavaCompile) {
 options.compilerArgs += 
 ['-Xep:MissingOverride:ERROR', 
 '-Xep:MissingCasesInEnumSwitch:ERROR',]
 }
}

However, in my code if I remove an @Override annotation somewhere or remove a switch statement, my Android project still builds. Shouldn't it fail with an error?

• Nico: I don't know if it behaves different for android projects but for our java EE build I implemented this: compileJava{ options.fork = true options.forkOptions.executable = 'javac' options.compilerArgs.addAll( [ '-APackageAcronym='+gradle.ext.packageAcronym, '-s', gradle.ext.generatedQueriesDir ] ) } since compileJava is it's own task.
• ADev: Do you put compileJava at the root level? If I do so in my case I get the following error message: "Error: Could not find method compileJava() ..."
• Nico: Yes I put it at the root level. I think it's different for android gradle builds? Just thought to give it a shot :) Sorry I wasted you're time.
• ADev: No, thanks for the suggestion! Appreciate you giving the time. :)
• Nico: I googled a bit and it seems android really hides the task compileJava and denies access to it. But I found this peace which seems to work for other users allprojects { gradle.projectsEvaluated { tasks.withType(JavaCompile) { options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation" } } } found here: stackoverflow.com/questions/18689365/… information for compileJava task: stackoverflow.com/questions/16853130/…

Answer 1

I googled your problem and found this post that described your problem and the solution looks like this:

allprojects { 
 gradle.projectsEvaluated {
 tasks.withType(JavaCompile) {
 options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
 }
 }
}

As is seems the gradle build is different for android projects than for java projects and you can't access the task CompileJava itself as stated in my first comment.

• Danny E.K. van der Kolk: Sir, I salute you. This was a pain, and you solved it! I wonder why Android Studio does not have a clear option for that in the project settings. Anyway, thanks!