Question: I tried to follow the steps in 

<http://greenrobot.org/eventbus/documentation/subscriber-index/>

but for some reason the MyeventBusIndex simply doesn't get generated!

Are there any reasons why that is the case for me??

```
android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "my.application.id"
        minSdkVersion 18
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
        javaCompileOptions {
            annotationProcessorOptions {
                includeCompileClasspath = true
                arguments = [ eventBusIndex : 'com.example.myapp.MyEventBusIndex' ]
            }
        }
    }
}

dependencies {
    compile 'org.greenrobot:eventbus:3.1.1'
    annotationProcessor 'org.greenrobot:eventbus-annotation-processor:3.1.1'

}

```

I have gradle 3.0.1

```
buildscript {
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
    }
}

```

Answer: 
After adding that configs in build.gradle, click **Build->Make** then *MyEventBusIndex* will be generated.
Today try to generate the MyEventBusIndex class, I failed。I found if no **@Subscribe** function in my project(I create new project to test EventBus index), the MyEventBusIndex class will not generate，but I try to **add the @Subscribe** function and **rebuild** the project, then check the directory 'app/build/generated/source/..’, i generate the MyEventBusIndex.