title: Android-Studio-1.2.RC Proguard warnings on Square's Okio library reference
body: <p>WIth Android Studio: 1.2.RC</p>
  
  <p>I enabled proguard in .gradle:
  ```</p>
  
  <pre><code>minifyEnabled=true
  </code></pre>
  
  <p><code>
  and added these rules to my proguard-rules.pro:
  </code></p>
  
  <pre><code>-dontwarn com.squareup.**
  -dontwarn okio.**
  </code></pre>
  
  <p><code>
  and added these lint rules to my .gradle file:
  </code></p>
  
  <pre><code>warningsAsErrors false
  abortOnError false
  disable 'InvalidPackage'
  </code></pre>
  
  <p>```</p>
  
  <p>But I still get these warning when I try to run the app in debug mode:</p>
  
  <pre><code>```
  Warning: okio.DeflaterSink: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
  Warning: okio.Okio: can't find referenced class java.nio.file.Files
  Warning: okio.Okio: can't find referenced class java.nio.file.Files
  Warning: okio.Okio: can't find referenced class java.nio.file.Files
  Warning: okio.Okio: can't find referenced class java.nio.file.Path
  Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
  Warning: okio.Okio: can't find referenced class java.nio.file.Path
  Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
  Warning: okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
  Warning: okio.Okio: can't find referenced class java.nio.file.Path
  Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
  Warning: okio.Okio: can't find referenced class java.nio.file.Path
  Warning: okio.Okio: can't find referenced class java.nio.file.OpenOption
  Warning: okio.Okio: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
  Warning: there were 14 unresolved references to classes or interfaces.
           You may need to add missing library jars or update their versions.
           If your code works fine without the missing classes, you can suppress
           the warnings with '-dontwarn' options.
           (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
  :app:proguardDebug FAILED
  </code></pre>
  
  <p>```</p>
  
  <p>It's so weird since I also added these rules/options to all my library modules that depend on OkHttp/Picasso, I don't know where went wrong, perhaps this is a Android Studio bug ? Does anyone have any clues to this problem ?</p>
  
  <p>I have opened an <a href="https://github.com/square/okio/issues/144#issuecomment-95573233">issue</a> on github.</p>