title: “Package file was not signed correctly” error upon installation
body: <p>I created an Android app and published it within the Google Play Store.  Upon subsequent download, I receive the “Package file was not signed correctly” error.  I investigated and found the entry:</p>
  
  <p><a href="https://stackoverflow.com/questions/2519374/published-android-apk-gives-error-package-file-was-not-signed-correctly">Published Android apk gives error &quot;Package file was not signed correctly&quot;</a></p>
  
  <p>I tried the JDK 6 solution (compile and sign under JDK 6) but there was no joy.  I tried to download/install on both a 2.3.3 and 4.x device but neither would work.  In my case, the app was new so the keystore is also (not an update) new.  I will say that the new keystore was initially created under JDK 1.7.</p>
  
  <p>I am stumped on how to approach resolving this issue, anyone have thoughts? </p>