Renaming “java” directory to “kotlin” in Android S

Question

My android project is written 100% in Kotlin and I wanted to rename the java directory to kotlin to be consistent. I added

sourceSets{
    main.java.srcDirs += 'src/main/kotlin'
}

to gradle and renamed the directory. All compiles and works fine.

The only issue is that when I am in the project tab, in "Android" view the directory is still named "java" (if I switch to the project view in the dropdown, I do see "kotlin" tho).

What am I missing?

Answer 1

Android Studio 3.6 has the same behavior. This is how I fixed it, in app/build.gradle:

// Register kotlin files
android.sourceSets {
     androidTest.java.srcDirs += "src/androidTest/kotlin"
     debug.java.srcDirs += "src/debug/kotlin"
     main.java.srcDirs += "src/main/kotlin"
     test.java.srcDirs += "src/test/kotlin"
}

Answer 2

I have the same. It happens only in "Android" view. When I navigate to that folder in Finder it's named 'kotlin'. Looks like it's a bug in the Android studio.

Answer 3

even if it is supported in android studio, kotlin is still a plugin and v3.4 has the same behavior.

the solution:

sourceSets{ main.java.srcDirs += 'src\\main\\kotlin\\' }

in settings.gradle or local.properties works for me (windows)

Answer 4

I think this feature Android Studio. By default, the folder with the source code it is marked as "java". Even if you are in the "src/main" folder contains "kotlin" and "java".

Answer 5

This works fine in Android Studio 3.6.2 and should be the most versatile solution until AndroidSourceSet starts supporting Kotlin directly. Just add the following snippet at the end of your app/build.gradle[.kts]:

android.sourceSets.all {
    java.srcDir("src/$name/kotlin")
}

Answer 6

On Linux

In your modules gradle file ex: app.gradle

sourceSets{ 
    main.java.srcDirs += 'src/main/kotlin/' 
}