title: Android App Installation Failed: Package com.my.app has no certificates at entry AndroidManifest.xml
body: <p>in Android Studio I generated a signed APK with keystore and so on. While installing the APK onto a device it fails with 'App could not be installed' and in Android Monitor I saw the following line:</p>
  
  <pre><code>Package com.my.app has no certificates at entry AndroidManifest.xml; ignoring!
  </code></pre>
  
  <p>Does anybody know what's wrong? </p>