title: android studio - proguard.cfg file is missing
body: <p>I want to minimize the size of <code>.apk</code> file, so I follow the Android Developer guide (<a href="http://developer.android.com/tools/help/proguard.html" rel="nofollow noreferrer">http://developer.android.com/tools/help/proguard.html</a>), but there are some problems I encountered as follows:</p>
  
  <p>I create a new project via Android Studio, but it doesn't generate a <code>proguard.cfg</code> file. And there exists a local. Properties file rather than project. Properties file. </p>
  
  <p>How can I figure out this issue? </p>