Android GST Billing Project with Source Code

Android GST Billing Project is GST billing solution. The system enables you to add products and items, create customers and users, and generate as many invoices, receipts and quotes as you want.
The system provides some other awesome features which include instant invoice calculations for items, quantity, , Taxes / VAT and total without any extra effort. I build this app to android app sqlite database used.
Features
Easy Layout.
Generate Invoices and receipts PDF Support
Unique bill numbers
Functionality to create invoice item each time or choose from database.
Functionality to choose TAX.
Generate downloadable PDf files
And lot more...
Technology, Tools and Plugin Used
Android Studio
Windows 10
compileSdkVersion 25
buildToolsVersion "25.0.2"
minSdkVersion 15
targetSdkVersion 25

Detailed Project Description

Android GST Billing Project with Source Code digitises the day-to-day records and workflows of an organisation so data is stored once, retrieved instantly and reported accurately.

How It Works
1. Role-based login separates admin, staff and end users.
2. Each module (records, bookings, transactions, reports) provides full CRUD operations with validation.
3. Data lives in a relational database with proper relationships between entities.
4. Reports and search views summarise the stored information.

Technology Roles
- BLE
- Android
- SQLite

Implementation Steps
1. Define requirements and draw the ER / class diagram and screen flow.
2. Set up the environment (Arduino IDE) and create the project skeleton.
3. Design the database schema / data model and seed it with sample data.
4. Implement the core modules with validation and role-based access where needed.
5. Build the user interface and connect it to the backend / data layer.
6. Test each module (unit + manual), fix edge cases and secure inputs (SQL injection, XSS, auth).
7. Prepare documentation, screenshots and a demo build.

Key Features
- Role-based access
- CRUD modules
- Search and filters
- Reports / export
- Validation and error handling

Expected Output
On completion the student will have a multi-user application with organised records and printable/exportable reports.

Deliverables
- Complete source code with comments
- Database schema / data model and screen flow
- Project report with screenshots and results
- Demonstration-ready build