Gradle apt error for eventBusIndex...

I’ve wrestled with this for the past couple of hours or so, but cannot get gradle to build my index. I get the following error: warning: The following options were not recognized by any processor: '[eventBusIndex]'

Here are snippets of my build.gradle file. I also have apt working for dagger 2.0, so I know my apt configuration works:

buildscript {
    repositories {
        mavenCentral()
        maven { url 'https://maven.fabric.io/public' }
    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.21.5'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
        classpath 'me.tatarka:gradle-retrolambda:3.2.5'
    }
}

repositories {
    mavenCentral()
}

apply plugin: 'com.android.application'
apply plugin: 'com.neenbedankt.android-apt'
apply plugin: 'me.tatarka.retrolambda'

dependencies {
    compile 'org.greenrobot:eventbus:3.0.0'
    apt 'org.greenrobot:eventbus-annotation-processor:3.0.1'
}

apt {
    arguments {
        eventBusIndex "com.example.EventBusAppIndex"
    }
}

Any pointers on what I may be missing?

Thanks a lot for a fantastic library btw. I’ve used 2.x version extensively in past projects

[chufengma]

Finally, I find the reason. It must have at least one @Subscribe method such as : `

@Subscribe
    public void onEvent(Event event) {}

then build error gone

[qianzui]

@chufengma thank you!