title: Android Studio says "cannot resolve symbol" but project compiles
body: <p>I'm importing twitter4j in AndroidStudio, using the following in my build.gradle:</p>
  
  <pre><code>dependencies {
    compile 'com.android.support:support-v4:18.0.+'
    compile files('libs/twitter4j-core-3.0.4.jar')
  }
  </code></pre>
  
  <p>The project compiles fine, and I can create twitter objects without a problem. However, in Android studio, anything referencing that library shows "cannot resolve symbol" and displays in red. What do I need to do to get Android Studio to recognize the library?</p>
  
  <p>I have already tried rebuilding the project, ./gradlew clean, and closing and re-opening my project.</p>