In Android Studio 3.1.2 this setting is under:
File -> Other Settings -> Default Settings... -> Build, Execution, Deployment -> Compiler -> Java Compiler -> Additional command line parameters
Update
For more recent versions of Android Studio [tested on Android Studio 3.5 but probably starting from 3.4 according to Joel's comment] this setting is under:
File -> Other Settings -> Settings for New Projects... -> Build, Execution, Deployment -> Compiler -> Java Compiler -> Additional command line parameters
For existing projects it seems to me that the only option is to implement the solution described in these two answers A1 and A2, modifying the build.gradle
file wrapping around allprojects
or not based on your needs:
allprojects {
gradle.projectsEvaluated {
tasks.withType(JavaCompile) {
options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
}
}
}
More details about Gradle's Multi-Project Builds can be found here on their official website