Building a Custom Android POS Terminal from Scratch: A Step-by-Step Guide with Source Code

Are you looking to build a point-of-sale (POS) terminal for your business or project? Do you want full control over the hardware and software, without having to rely on third-party solutions? If so, an Android-based POS terminal is a great choice. In this tutorial, we will guide you through the process of building a custom Android POS terminal from scratch. We will cover everything from selecting the hardware components, to programming the software using Java and Android Studio. By the end of this article, you will have a working POS terminal that you can customize to suit your specific needs.

Step 1: Selecting the Hardware Components

The first step in building your own POS terminal is to select the appropriate hardware components. Here are some of the key components you will need:

Android device: You can use a smartphone, tablet, or dedicated POS device running Android as the core of your POS terminal. Make sure it supports USB peripherals and has enough processing power and storage to run your software.

Barcode scanner: Depending on your requirements, you may need a barcode scanner to scan products or customer IDs. You can use a wired or wireless scanner that connects to your Android device via USB or Bluetooth.

receipt printer: A receipt printer is essential for issuing receipts or tickets to customers. You can use a thermal or dot matrix printer that supports USB or Bluetooth connectivity.

cash drawer: If you accept cash payments, you will need a cash drawer that connects to your printer or directly to your Android device via USB.

Once you have selected your hardware components, you can start assembling them according to the manufacturer's instructions. You may also need to download and install the necessary drivers and libraries to enable communication between the hardware and software.

Step 2: Programming the Software

The next step is to program the software that will run on your POS terminal. We will be using Java and Android Studio to create our application. Here are some of the key features you may want to include:

User interface: You will need to design a user-friendly interface that allows staff to enter products, prices, and quantities, and issue receipts or invoices. You can use the Android layout editor to create the UI elements, such as text fields, buttons, and labels.

Barcode scanning: You can integrate a barcode scanning library into your app that enables you to read and decode barcodes from the scanner. You can use the Google Mobile Vision API or a third-party library, such as ZXing.

Payment processing: You will need to integrate your app with a payment gateway or processor that handles card and digital payments. You can use a third-party service, such as Square, PayPal, or Stripe, or develop your own payment gateway.

Receipt printing: You can use a printing library, such as ESC/POS or Google Cloud Print, to send print commands to your thermal or dot matrix printer. You can customize the receipt template to include your company logo, address, and other information.

Cash management: If you accept cash payments, you will need to program the cash drawer to open automatically when a cash payment is received. You can use a GPIO library, such as Pi4J or WiringPi, to control the drawer via USB.

Once you have developed and tested your software, you can deploy it to your Android device and start using it as a fully functioning POS terminal.

Conclusion

In this tutorial, we have shown you how to build your own Android POS terminal from scratch using off-the-shelf hardware components and programming it with Java and Android Studio. You can customize your POS terminal to suit your business or project needs, and integrate additional features, such as loyalty programs, discounts, or inventory management. By building your own POS terminal, you can save money, gain flexibility, and enhance the customer experience.

Happy coding!

POS Terminals

Breaking through commercial boundaries for
complete payment experience

Portable Handheld POS Terminal With Printer-S600

- Built-in POS receipt printer uses 58*35mm printing paper, no need of print cartridges or ribbons for low operating cost, low noise and high speed while printing.

- Integration of Various Payment Methods, such as Magnetic stripe cards, IC cards, con-tactless cards,QR code payments.

- Support 4G,3G, 2G, Wi-Fi, Bluetooth, and GPS positioning, support blue-tooth printer mode and ESC/POS mode. Improve your efficiency.

- With premium quality 3100mAh 7.6V Li-ion battery, fast charging, long usage time and large capacity enduring working time.

- Android POS terminal receipt printer support preinstalled catering, store management APP. Free SDK support if you plan to make your own APP, Compatible with custom Android software.

Efficient Work

Mobile Portable Printer, 0.2 seconds to complete a code scan. It fits for 58mm receipt printer with Android 12.0 OS, more environmental and cleaner. A swift printing speed of 120mm/s boosts 20% working efficiency, and low noise while printing receipts offers you a comfortable working occasion.

120mm/s
Printing Speed

58mm
Paper Width

38mm
Paper Diameter

0.2s
Scan code

Kingtop Financial Bank-Grade POS Terminals

·Trusted Point-of-Sale Platforms for Transaction Processing
·Reliable Receipt Printing and Long Battery Life
·Powerful and Versatile POS Systems for Retail Business
·All-in-one POS Systems for Efficient Transaction Processing
·Scalable Solutions with Bulk Discounts for Large Orders

Why Choose Us?

We’re here to help tailor our comprehensive business solutions to your specific needs.

5G Fast Connectivity

Our tablet devices are equipped with advanced 5G modules that support various network bands and protocols, which allows you to enjoy fast and stable internet access anytime and anywhere.

Rich Production Experience

We have been focusing on the production of intelligent mobile devices for 15 years, and we have a deep understanding of the industry trends and customer needs. We can provide you with high-quality products that meet your expectations and requirements.

Trouble Shooting

We have a professional and responsive customer service team that can solve any problems you encounter within 24 hours. You can also contact our engineers directly for technical support and guidance.

OEM

We can customize your tablet devices according to your specifications and preferences. You can choose the size, color, logo, software, hardware and accessories of your tablet devices. We will offer you the best solution that suits your budget and needs.

Prouduct Selection

We have a wide range of tablet devices for you to choose from, with different features, functions and prices. Our professional sales team will recommend the most suitable and cost-effective products for you based on your needs and preferences.

ODM

We have a professional R&D and design team that can develop innovative and unique tablet devices for you. We have 15 years of experience in software and hardware development, and we can create solutions that satisfy your customers and the market.Don’t miss this opportunity to get the best 5G tablet device for your business or personal use. Contact us today and get a free quote and sample!

Which POS Terminal is right for you?

Get the product features and functions you are looking for immediately.

Talk to us >        SAMPLE TEST >

S600

5.5-inch

IPS Screen,720*1280

3100mAh

3100mAh, 7.6V, long use time

120mm/s

120mm/s high-speed precision printing sign

Full specs→

V510

5.5-inch

IPS Screen,720*1440

2500mAh

2500mAh, 7.6V, long use time

100mm/s

100mm/s high-speed precision printing sign

Full specs→