title: Class in AAR file not available in Android Studio
body: <p>I created a library project which I built as an AAR file and later included in another project. It's in the libs folder, and the main gradle.build file includes it: <code>implementation fileTree(include: ['*.jar','*.aar'], dir: 'libs')</code></p>
  
  <p>When I try to use classes of this aar file, all of them are available except one class. I initially imagined it could be Proguard, but I even removed Proguard and it is still not available. It's a public class, and it's even there when I decompile the AAR file.</p>
  
  <p>This is the content:</p>
  
  <pre><code>package com.onboarding;
  
  import android.content.Context;
  import android.content.Intent;
  import android.support.annotation.Keep;
  
  
  /**
   *
   */
  @Keep
  public class Builder {
  
  
      /**
       *
       */
      public static String mainColor = null;
      public static String baseUrl = null;
      public static Class firstActivity = null;
      public static Class onboardingSettingsActivity = null;
  
  
      /**
       *
       */
      public static String tosUrl = null;
      public static String privacyUrl = null;
      public static String cookieUrl = null;
      public static String contactsLearnMoreUrl = null;
  
  
      /**
       *
       */
      private static Builder builder = null;
  
  
      /**
       *
       */
      private Builder() {}
  
  
      /**
       *
       */
      public static Builder init() {
          if (builder == null) {
              builder = new Builder();
          }
          return builder;
      }
  
  
      /**
       *
       */
      public void start(final Context context) {
          final Intent intent = new Intent(context, Onboarding1.class);
          context.startActivity(intent);
      }
  
  
      /**
       *
       */
      public Builder setMainColor(final String color) {
          mainColor = color;
          return this;
      }
  
  
      /**
       *
       */
      public Builder setBaseUrl(final String url) {
          baseUrl = url;
          return this;
      }
  
  
      /**
       *
       */
      public Builder setFirstActivity(final Class c) {
          firstActivity = c;
          return this;
      }
  
  
      /**
       *
       */
      public Builder setOnboardingSettingsActivity(final Class c) {
          onboardingSettingsActivity = c;
          return this;
      }
  
  
      /**
       *
       */
      public Builder setTosUrl(final String u) {
          tosUrl = u;
          return this;
      }
  
  
      /**
       *
       */
      public Builder setPrivacyUrl(final String u) {
          privacyUrl = u;
          return this;
      }
  
  
      /**
       *
       */
      public Builder setCookieUrl(final String u) {
          cookieUrl = u;
          return this;
      }
  
  
      /**
       *
       */
      public Builder setContactsLearnMoreUrl(final String u) {
          contactsLearnMoreUrl = u;
          return this;
      }
  
  }
  </code></pre>
  
  <p>Any idea why I can't access this class from the main project?</p>
  
  <p>Thanks!</p>