title: What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
body: <p>I was trying to change my default/main/startup (whatever you call it) activity by editing the <code>androidmanifest.xml</code> file. All i did was change the <code>android:name</code> property. however, this completely broke the entire app. when I try to install it fails and reads.</p>
  
  <blockquote>
    <p>Installation error: INSTALL_PARSE_FAILED_NO_CERTIFICATES</p>
  </blockquote>
  
  <p>When I tried to change it back to its previous state, it was still giving me the same error... What have I done?</p>