app developer

I need an Android app. I would like it designed and built. I want a simple app for android with source code. my business is delivery service. we just provide delivery of all essential [login to view URL] need just a option like grocery, meat, fruits etc in which customer we type the products which he wants get deliver. and also we deliver anything that they want from some office or home. then the order details will be send to admin whatsapp and after confirmation the customer will get get details of order on there whatsapp. the payment mode is cash on delivery. it is just like a diary where the write there order list to purchase from store Following are the brief details. *Application* Customer login vendor login delivery boy login *customer login:* 1. Customer signup filling form 2. Order filling form with option Grocery | Household Items. Medicine. Vegetables | Fruits. Meat Items. Food | Restaurant Orders Documents | Stationary | Books. Electronic Items. Laundry. Repairing. Keys. Paan. Other. 3. Order cofirmation placing 4. order send to admin whatsapp and admin panel 5. after confirm customer recieve code. 6. the code will be share with delivery boy to know that order is delivered. *Vendor login:* 1. Vendor login is done by admin. 2. vendor recieve the order from admin(not by customer) 3. Vendor recieve the code after order generated. 4. vendor share code with delivery boy while giving products to delivery boy. 5. admin will confirm the Payment done of order after reciveing payment from customer. *delivery boy login:* 1. Login done by the admin with rider name and details. 2. He will recieve the order from admin with all details of customer with location and order. 3. he will get the code from the vendor when vendor give the order products to delivery boy. the code will confirm that delivery boy had received the products from vendor. 4. customer will give the delivery boy a code which was generated after order confirm. the code will confirm that order is received by customer. *admin:* 1. admin will have full power of customer, delivery guy and vendor. 2. admin can check all the details of delivery and order. 3. total payment received and pending amount.