title: Android proguard, keep inner class
body: <p>My android program has a <code>class A</code>, which has two <code>static inner class</code>. They are found to be stripped from <code>.dex</code> after applying proguard.</p>
  
  <pre><code>public class A{
  
    ...
    static class B{
      ...
    }
  
    static class C{
      ...
    }
  }
  </code></pre>
  
  <p>I have put the following lines in proguard.flags, but seem no luck. </p>
  
  <pre><code>-keep class com.xxx.A
  -keep class com.xxx.A$*
  </code></pre>
  
  <p>Any hint?</p>