The App needs to do the following:

I need a small app to scan barcodes. Barcodeformat is EAN 13 with add-on 2 or 5 digits.
After scanning the barcode the app should open a webpage (inside the app) and submits the barcode to the webpage. The webpage is already existing. On the webpage the user can enter some date an click save. Then he should be able to hit a “scan” button to restart the scanning process (or better instead of hitting the scan button he should be referred to the scanner automatically after saving the webpage content (submit the form)).

Important: before start scanning he needs to logon to the website (inside the app). Login system is already available and uses cookies.

So the workflow should be like this:
1) Open Webview to existing login url
2) after login in web view go to barcode scanner
3) after scanning a code post barcode to existing url (ie. )
4) after loading the url, entering data and save it go back to barcode scanner to start over again