Application for Android working with API
267 USD Hello everyone!
It is necessary to develop an application for Android devices.
Android version: starting from 5.
Essence of the application:
An application for counting products by barcode.
All logic for searching by barcode and accumulating quantity is implemented on the server, which the application should interact with via JSON API.
The barcode is simply a text field.
Screen logic:
1. Authorization via login and password. Screen 1;
2. Displaying a menu with 3 buttons: Count, settings, exit. Screen 2;
3. Sending the entered barcode to the API, parsing the response, sending the entered quantity to the API. Screen 3;
Authorization principle:
The user enters the login and password on Screen 1 and clicks "Login"
A GET request is sent to the server. Basic authorization is used.
The server returns cookies with a token. With each subsequent request, cookies must be sent.
User registration through the application is not required.
Interface button sounds:
When pressing the screen buttons, sounds of pressing should be played. Sound files will be provided.
Interface nuances:
Screen 3 - should not trigger the built-in Android keyboard when activating input fields.
All input should work through the buttons of the application itself.
For entering the barcode field - it is important to use the system input field, as data can be entered through a Bluetooth keyboard or emulated by the device itself.
Application memory usage:
The application should store the login and password entered by the user in memory.
To avoid repeating the input procedure.
Displaying server errors:
There will be additional description for the task. It may simply be displayed on the screen.
Design
Should be user-friendly. Additional discussion is required.
Additional information for potential developers:
After the project is implemented, it cannot be included in your portfolio on this site or others.
The project must be handed over to the client in the form of an Android Studio project and as an archive file.
The project should be developed in such a way that it can be further refined and understood in the source code.
There should be an option to publish the application in the Play Market.
Logic of screen number 3
Technology and Performance Requirements:
In order to achieve high performance on low-end devices - the application must be developed using native technologies for Android (Java or Kotlin).
Use of JavaScript frameworks, hybrid solutions (Cordova, Ionic, React Native, WebView, Flutter) is not allowed
Требования к технологиям и производительности:
В целях достижения высокой производительности на слабых устройствах - приложение должно быть разработано с использованием нативных технологий для Android (Java или Kotlin).
Не допускается использование JavaScript-фреймворков, гибридных решений (Cordova, Ionic, React Native, WebView, Flutter)
Client's review of cooperation with Andrey Martsinkevich
Application for Android working with APII recommend the performer. Quality, attention to detail, professionals!
Freelancer's review of cooperation with Pavel Pavel
Application for Android working with APIEverything is fine. We continue to collaborate.
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12 days267 USD
12 days267 USD
Design from my side? Right? Then we need to start with that, and then evaluate the development itself.
What is available on the API?
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Winning proposal7 days267 USD
3967 101 0 Winning proposal7 days267 USD
Hello. Ready to help with the project implementation. Approximately 7-10 days, 8-12k UAH. More precisely after clarifying the details.
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12 days245 USD
1890 26 0 1 12 days245 USD
Hello,
Kotlin stack, Jetpack Compose, there are questions about design and logic.
Best regards!
-
1 day27 USD
11616 44 0 1 day27 USD
Hello, I have experience in development with Kotlin, and I have also worked with barcodes/QR codes multiple times.
For details, please write in private messages.
I will be happy to help you!
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7 days111 USD
116 7 days111 USD
Good evening!
I am not a specialist, but I can try to complete the task in a short time and for a symbolic payment.
Stack-Kotlin
Open to any ideas and ready to quickly get to work.
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10 days267 USD
1956 20 0 10 days267 USD
Ready to develop such an application, ready for further scaling. Development language - Kotlin.
Contact us
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14 days312 USD
482 2 0 14 days312 USD
💼 Android application and web solution developer
I have experience in creating both mobile and web solutions. I work with Java/Kotlin (Android Studio, Firebase) for Android development, as well as with PHP, MySQL, HTML5, CSS3, jQuery for backend and websites. This allows me to implement comprehensive projects — from mobile utilities and business applications to full-fledged e-commerce platforms.
📌 My tools:
Android: Java, Kotlin, Android Studio, Firebase, REST API
Web: PHP, MySQL, HTML5, CSS3, jQuery
CMS: WordPress, OpenCart, Joomla, Bitrix
Frameworks: Laravel, Symfony, Yii2
🔍 I approach tasks comprehensively: I consider business goals, user convenience, performance, and scalability of solutions.
🛠️ What I offer:
… Development of Android applications from scratch (UI/UX, backend, integrations)
Integration with APIs, payment systems, CRMs, and databases
Optimization for different devices and Android versions
Testing, support, and project development
Full cycle — from idea to publication in Google Play
📞 Ready to discuss the details of your project and start working right now.
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7 days356 USD
646 7 1 7 days356 USD
Good day.
I am ready to discuss and implement the project, with over 10 years in mobile development.
I have both million-user games and have developed various types of applications.
The project will be written natively. We can also implement the server side.
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7 days267 USD
531 33 0 7 days267 USD
Good day, I can create this application for you.
I work with Android Studio + Kotlin.
If needed, I can also help with the backend in Node.js.
P.S. I have worked with separate keyboards and barcodes, I have experience with similar projects.
Everything else in detail in private messages.
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7 days267 USD
151 7 days267 USD
Good day, I can help create the MVP of this application. I have extensive experience in developing client-server applications. We can discuss the details, price, and timeline.
Wishing you a great day, Anton.
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1 day289 USD
323 1 day289 USD
Good day, Pavlo!
We at Mobiwolf specialize in native Android app development (Java/Kotlin) with high performance even on weak devices. I see that your project requires careful work with API, cookie authorization, and a special interface for barcode scanners — we have already had experience implementing similar solutions.
We are ready to:
• Implement all functionality strictly in Java/Kotlin without hybrid frameworks;
• Ensure stable operation with the API and preservation of authorization data;
• Deliver a finished Android Studio project + .apk, ready for publication on Google Play.
… To agree on timelines and budget, please let us know:
1. Is there a ready design or is development needed from scratch?
2. Is the API fully ready?
3. Is user action logging required?
We can start immediately after clarifying the details.
I suggest discussing our rates, portfolio, and other details through personal chat.
Best regards,
Oleksiy Karaykoza
CEO, Mobiwolf
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60 days601 USD
1498 9 0 60 days601 USD
Hello!
We are ready to take on the implementation of your project — everything is clearly and understandably outlined. We have extensive experience in developing Android applications with support for older versions (including Android 5+) and interaction with the server via JSON API.
✅ We will consider all the specifics:
— authorization via Basic with cookies,
— disabling the system keyboard,
— working with Bluetooth scanners,
— built-in interface sounds,
… — a convenient project architecture suitable for further development.
We will provide:
— clean and understandable code in Android Studio,
— an apk file and source code at the end,
— full compliance with the technical specifications and quick communication,
— confidentiality — no publication in the portfolio, as required.
We can also offer support after delivery and assistance in publishing on Google Play, if needed.
We would be happy to discuss the details by voice or in chat and are confident that we can implement everything at a high level.
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20 days445 USD
2662 53 0 1 20 days445 USD
I have extensive experience in developing various mobile applications for Android. I will be able to provide the exact timeline and cost after discussing all the details.
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4 days601 USD
1144 10 0 4 days601 USD
Hello!
We have been developing mobile applications for over 8 years. We are ready to implement your project. We have reviewed the technical specifications. Considering that there is no design yet, it will take approximately 3-4 days for development. A more accurate estimate can be provided once you show the design.
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15 days334 USD
3634 7 0 15 days334 USD
Hello! I can implement the application either in Java or in Kotlin, or even a hybrid one, so that it works on iOS as well - in Flutter.
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Привіт.
Що має бути в налаштуваннях? -
Привіт!
На данному етапі, просто текстова інформація -
В вас вже готова серверна частина чи потрібно спочатку мокати респонзи?
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