Droid Queue Management System - repost

My project is an Android application which will replace the usage of papers in the current queue management systems used in the post office. It requires the development of an Android application and also an online system. The Android app will be used to capture the QR code being displayed on the ticket number machine's screen and submitting the details to the system. The system will then update the queue number and return the current number being served at the counter every 5 minutes. the responsibility of the programmer will be to help develop the Android application and the system to be used. The Android application which is in charge of capturing the QR code and sending the QR Code details to the system will be used by the users themselves. The system will be in charge of retrieving the details send by the users and updating the database to make sure that the Queue number on the ticket number and the current queue number is updated. please look at the picture to have a better understanding. The parts which are circled will be developed. Thanks.