title: Exception while decompiling apk
body: <p>I am trying to make a secured android app. I've enabled <strong>proguard</strong> in my app. But it doesnt hide any of the xml files or manifest while decompiling. It only changes the .java files.</p>
  
  <p>I tried to decompile apk of another app from play store using <strong>apktool</strong>. Then I got the following exception</p>
  
  <pre><code>Exception in thread "main" brut.androlib.AndrolibException: brut.directory.Direc
  toryException: java.util.zip.ZipException: error in opening zip file
          at brut.androlib.ApkDecoder.hasSources(ApkDecoder.java:199)
          at brut.androlib.ApkDecoder.decode(ApkDecoder.java:83)
          at brut.apktool.Main.cmdDecode(Main.java:146)
          at brut.apktool.Main.main(Main.java:77)
  Caused by: brut.directory.DirectoryException: java.util.zip.ZipException: error
  in opening zip file
          at brut.directory.ZipRODirectory.&lt;init&gt;(ZipRODirectory.java:55)
          at brut.directory.ZipRODirectory.&lt;init&gt;(ZipRODirectory.java:38)
          at brut.androlib.res.util.ExtFile.getDirectory(ExtFile.java:55)
          at brut.androlib.ApkDecoder.hasSources(ApkDecoder.java:197)
          ... 3 more
  Caused by: java.util.zip.ZipException: error in opening zip file
          at java.util.zip.ZipFile.open(Native Method)
          at java.util.zip.ZipFile.&lt;init&gt;(Unknown Source)
          at java.util.zip.ZipFile.&lt;init&gt;(Unknown Source)
          at brut.directory.ZipRODirectory.&lt;init&gt;(ZipRODirectory.java:53)
          ... 6 more
  </code></pre>
  
  <p>Then the xml files and manifest were not revealed. I would also like to secure my app like this. How is this possible?</p>