Android Sales Invoice - repost 2

Simple Design of Android Application for a web based financial system to add invoice and download pdf report so the sales staff can make it with the clients by his android phone and this invoice saved in database. Data transfer using a JSON Webservice already created and documented.(see attached documentation). Forms: 1. Login Form. 2. Home Form with 3 buttons.(Add Invoice button - Show Report button - Settings ) 3. Settings (to set the domain). 4. Invoice Form to be filled (see attachments) 5. add new customer Form (see attachments) 6. Report Form (2 buttons to download 2 different reports) See Attachments for details.