The Complete Retrofit Lifecycle in a Real Android App
Most Retrofit tutorials show you isolated code snippets. This article traces the entire lifecycle of a Retrofit call — from app startup to data appear…
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How I Built an ATS Resume Builder App for Android (And What I Learned)
After months of watching friends get rejected by job applications they were qualified for, I discovered the real culprit: Applicant Tracking Systems (…
Run Real Docker on Android — No Root, No Tricks, Just QEMU
Run Real Docker on Android — No Root, No Tricks, Just QEMU You have an old Android phone in a drawer. It has 8 cores, 8–12 GB of RAM, and a fast SSD. …
An AI Module Smaller Than a Smartphone Photo. Are We Underestimating the Computer We Carry Every Day?
The Idea and the Main Engineering Challenges Recently, I released a new offline AI feature for my Android application as a separate module. The entire…
OpenAPI, ORM, SVG and Lottie
This is the third follow-up to Friday's release post . Saturday's was about how you iterate; yesterday's was about new platform APIs in the core; toda…
🚀 Rebuilding My Android App with Jetpack Compose: The Mailfo v2.0 Journey
Hey DEV community! 👋 I just completely rebuilt and launched Mailfo v2.0 , an privacy-focused temporary disposable email app for Android[cite: 1, 2]. T…
WebSocket Half-Open Connections and gRPC Gateway Discovery in Complex LAN WebRTC Systems
The target scenario is not consumer calling. It is closer to B2B institutional device fleets: many shared devices, long-running uptime, centralized op…
How WhatsApp Works Without Internet: Offline Messaging and Synchronization Explained
Imagine you're traveling on a flight with airplane mode enabled. You type a message to your friend: "Hey, I just landed. Will call you soon." You tap …
Production Android Auth: OAuth2, PKCE & KeyStore Security
Most Android authentication tutorials stop at “getting the token”. But in real production systems (especially fintech apps), that’s just the beginning…
Building a Native QR/Barcode Scanner for React Native — New Architecture Ready
Most QR scanner libraries for React Native share the same problems — they're unmaintained, they don't support the New Architecture, or they pull in a …
"Reinstalling Won't Fix It": A Cross-App Shared-Auth Deadlock After Switching Phones
After migrating to a new Android phone, a few specific apps stopped launching. Amazon Shopping and Kindle would freeze on a blank white or black scree…
Gradle под капотом: как перестать страдать и заставить сборку летать
Привет, Хабр! На связи «Исходный Код». Сегодня разбираем инструмент, который мы все запускаем по сто раз на дню, но часто воспринимаем как черный ящик…
The Kimwolf Bust Just Outed Android Webcams as Botnet Fodder — Here's the Question Every Repurposed-Phone Camera Setup Has to Answer
On May 22, 2026, the U.S. Department of Justice announced the arrest of a 23-year-old in Ottawa for allegedly running Kimwolf , a DDoS-for-hire botnet…
Vestige: A Gemma 4 Brain Tracker That Won't Blow Smoke Up Your Ass
This is a submission for the Gemma 4 Challenge: Build with Gemma 4 TL;DR What: Vestige —an ADHD-friendly Android app designed to point out the things …
The Sleeper Announcement from Google I/O 2026 That Will Change How We Think About Apps
This is a submission for the Google I/O Writing Challenge Everyone walked away from Google I/O 2026 talking about Compose First, Gemini integrations, …
AccessLens — a blind person's lanyard, powered by Gemma 4 on-device
This is a submission for the Gemma 4 Challenge: Build with Gemma 4 What I Built AccessLens is an Android app that turns a Pixel 8 worn on a lanyard in…
Технический гайд по сторис – часть 4: как мы добавили видео формат
Привет! Меня зовут Владислав Фальзан, я работаю android-разработчиком в М2. Наша команда мобильной разработки развивает приложение – онлайн-платформу …
Pragmatic Optimization in Mobile App Size: 3 Misconceptions
The Importance of Pragmatic Optimization in Mobile App Size In the world of mobile app development, I often see that app size plays a critical role in…
Переезд с XML на Jetpack Compose на проде: базовые классы, архитектура, сложности и готовые решения
Меня зовут Родион, и я уже около 2,5 лет работаю в VK Android-разработчиком в крупном многомодульном проекте с сотнями экранов и довольно большой ауди…
Chris Banes' Skills Repo: Claude Code Meets Android Development
Last week Chris Banes — yeah, that Chris Banes from the Android team at Google — published a public repo of Claude Code skills targeting Kotlin, Jetpa…
Turning Android WebView into a Real Local HTTP Runtime
Turning Android WebView into a Real Local HTTP Runtime Most Android hybrid apps still load their frontend using: file:// And that comes with problems:…
My Journey as a Flutter Developer — Building Real-World Apps with Firebase & GetX
🚀 Hello DEV Community! I am a Flutter developer passionate about building high-performance mobile applications for Android and iOS. Over the past few …
Mobile Visual Regression Testing in 2026: Why Vision AI Catches What Script-Based Tools Miss
Your functional tests pass. Your unit tests pass. Your E2E suite is green. And then a user reports that the checkout button is invisible on the Galaxy…
I got tired of Android MTP hanging, so I bypassed it with a C++ daemon and Rust.
If you've ever plugged a 256GB Android phone into a Mac and tried to browse files, you know the pain. Android File Transfer hangs. OpenMTP crashes. Ma…
I Couldn't Find a Rolling Text Library for Compose, So I Built One
A small library, a long journey through Compose animations, and a few bad ideas along the way. The Itch I work on a crypto-banking app. Crypto prices …
What is a Chat API? The Definitive Guide to In-App Messaging (2026)
Building chat looks easy on a whiteboard. You send a string, they get a string. Simple, right? But then reality kicks in. Suddenly, you’re dealing wit…
How to handle hardware attestation without locking out real users
Last month I got a bug report that made me close my laptop and go for a walk. A paying user couldn't log in. Their device was rooted? Not according to…
Termux App Store — A TUI Package Manager for Termux
Hey everyone, I’ve been working on a project called Termux App Store — a terminal-based app store / package manager experience designed specifically f…
5 React Native Errors That Cost Me Hours (And How I Finally Fixed Them)
When I started building my React Native app, I thought the hard part would be designing the app itself. Turns out, debugging the environment was the r…
Building OrinIDE — A Browser-Based IDE for Android with AI Support
Building OrinIDE — A Browser-Based IDE for Android with AI Support For a long time, coding on Android has felt awkward. Most mobile coding apps are ei…