Open Source

How I Store Dates and Money in Financial Applications

PRO TIP! I've been developing a financial records app for the last 30 days. Along the way, I realized there are two fundamental problems that almost e…

Nvidia Shield Android TV 2017 (Darcy) Anything developing on these Shield TV's? Im still interested in porting Linux to this machine I have.....just not the old fashioned Ubuntu 18.04

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…

How to Fix "Module Could Not Be Found" in React Native & Expo

We’ve all been there. You find an awesome library, you run npx expo install , you import it into your code, and you start your development server. You…

Android Kiosk: как купить сухарики, когда ларёк закрыт

Несколько месяцев назад моему коллеге предстоял долгий перелёт — около 8 часов. Ему быстро стало скучно, и он обратил внимание на …

Can I Replace My Wyze Cam With an Old Android Phone in 2026? What That $29.99 Renewal Is Really Buying

Originally answered on Quora in early June 2026 as a "can I just stop paying Wyze?" question. This is the dev.to canonical at T+7d, expanded with the …

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 (…

APK Install and App Manager in Rust + Tauri — Building ADB Tools

All tests run on an 8-year-old MacBook Air. All results from shipping 7 Mac apps as a solo developer. No sponsored opinion. HiyokoKit includes APK ins…

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. …

Your Codename One App, Now A Native Mac App

Codename One has run on the desktop for a long time through the JavaSE target, which is the same engine that powers the simulator. What it did not hav…

🚀 Day 0/30: Building a Real Android App for a Client in Public

Today marks the start of a new challenge. For the next 30 days, I'll be building a real Android application for a client and documenting the journey p…

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…

Configuring Firebase AI Logic for Android to Use Gemini Models

What device do we use almost all the time? Our mobile phone, almost certainly. If we wanted to develop mobile apps, we would have wondered how to inte…

Jetpack Compose Navigation(Interview Prep)

About this article: This is based on hands-on review of a real project. The goal is understanding over memorization — because interviewers can always …

I Built a 1 MB Android Widget for DeepSeek AI – Here’s How It Works (and Why You Might Want It)

The problem : I love using DeepSeek AI, but every time I wanted to ask something, I had to: Unlock my phone and then find the DeepSeek app icon , wait…

Your coding agent's barcode scanning code looks right … and breaks in the field

Coding agents write barcode scanning code that compiles and passes review, then falls apart on a damaged label. Here's how we taught them to get it ri…

Injecting WorkManager into ViewModels with Dagger Hilt. No Context, No Boilerplate, Always a WorkQuery Back

WorkManager is the right tool for deferrable, guaranteed background work in Android. But the default setup pushes you toward boilerplate fast: you end…

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…

I made a censorship-resistant static website viewer with no serving host on Nostr

What I made I made an Android app called Bouquet . In short, it is a viewer that shows you a website, even though no server is serving that website. W…

Я не программист, но меня так достали современные читалки на Android, что я написал свою. Встречайте — MRead

Всем привет! Я хочу поделиться историей о том, как обычная пользовательская боль заставила меня открыть Android Studio и сделать свой первый серьезный…

I Built a Feature That Automatically Switches Android from USB to Wi-Fi — Here's How It Works

All tests run on an 8-year-old MacBook Air. All results from shipping 7 Mac apps as a solo developer. No sponsored opinion. You plug in your Android d…

🚀 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…

Project Log #1: I'm Building an AI Agent That Controls a Phone

I'm starting a new project. It's the most ambitious thing I've attempted from a phone. The goal: an AI agent that controls a smartphone. It opens apps…

Remote Terminal – Control Your PC from Phone

Overview Remote Terminal lets you run a full command‑line on your Windows or macOS PC directly from your Android phone, iPhone, or iPad. After a quick…

AI, OAuth, And Other Platform APIs In The Core

This is the second follow-up to Friday's release post . It covers the platform APIs that moved into the framework core this release. There are two hea…

I wasted 6 weeks on Google Play's closed testing. Here's what finally worked.

I need to vent. And maybe save someone else from the same nightmare. The backstory I'm a solo Android dev. I've been working on my app for about 4 mon…

Как заставить Xiaomi TV летать: скрытые настройки, которые вырежут всю рекламу и лаги

В этой статье подробно описан практический опыт оптимизации телевизора Xiaomi Mi TV с 1.4 ГБ оперативной памяти. В публикации детально разбираются сле…

I built a word puzzle RPG where you swipe letters to attack enemies — 2+ years solo, now live on Android

I just launched Kotobato on Google Play after about two and a half years of solo development. It's a word puzzle RPG — you swipe connected letters on …

On-Device Debugging And JUnit 5

This is the first follow-up to Friday's release post and it covers the two changes from this release that affect how you iterate on a Codename One app…

Submitting to App Store and Play Store as a solo developer - what actually happened

I submitted Termique to the App Store and Play Store three days ago. It's live now. Here's what the process actually looked like, because most guides …