title: Android app update, assets update
body: <p>I have an  app and it uses .txt files from <em>assets</em> folder. In <em>assets</em> folder are more  directories in some depth.
  Later I will want to add new files to this assets folder so I'll have a new apk(cause files in assets are part of the apk).
  <strong>The question:</strong>  So what happens when someone, who is using my app, wants to update my app(with new files in assets) through <em>Google Play</em>, will it uninstall his old version and install the new one or how he receive these new files?
  Or <strong>simpler</strong>: What happens during an app update? </p>
  
  <p>Could someone make me keen vision in this a little? Thanks.</p>