AndroidAnnotations Nothing Generated, Empty Activity

I am trying to create a project using AndroidAnnotations in Android Studio. When I build and run the project, everything seems to compile fine, yet I get nothing but a blank activity for the app. In addition, it does not appear that anything is generated by AndroidAnnotations.

I have added androidannotations-api-2.7.1.jar as a dependency for my project, and enabled annotation processing with the processor path the path to androidannotations-2.7.1.jar, which is in a separate folder from androidannotations-api-2.7.1.jar. I have checked store generated sources relative to module content root, and tried many different directories for the sources -- from generated, to gen/aa, to (currently) build/source/aa to match where it seems the generated files are created in Android Studio. Nothing has worked. I have changed the activity name in the manifest to Activity_, and set the configuration to launch this when the project is run.

The only other dependencies I have are android-support-v4 and ActionBarSherlock. I have tried with both of these disabled, to no result. I initially planned to use Roboguice in conjunction with AndroidAnnotations, but have disabled it for the time being to try to focus on this issue.

I am also using, or trying to use, Gradle. This is currently my build.gradle:

buildscript {
  repositories {
    maven { url 'http://repo1.maven.org/maven2' }
  }
  dependencies {
    classpath 'com.android.tools.build:gradle:0.4'
  }
}

apply plugin: 'android'

dependencies {
  compile files('libs/android-support-v4.jar')
  compile files('libs/actionbarsherlock-4.3.1.jar')
  compile files('libs/androidannotations-api-2.7.1.jar')
}

android {
  compileSdkVersion 17
  buildToolsVersion "17.0.0"

  defaultConfig {
    minSdkVersion 7
    targetSdkVersion 17
  }
}

However, I haven't really figured out how G