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Architecting a Low-Power GPS Geofencing Engine for Android Background Services

The atmosphere in the room was dense, the kind where every whisper echoes. I was sitting in the third row of a local community center during a Frida…

What is an AI Agent Phone?

An AI agent phone is a real, or cloud-hosted, smartphone that an LLM-powered agent can operate on its own. It sees the screen, taps, swipes, types,…

Building a Ultra Aggressive Download, Streamer & Browser : Jenius Blitz #appdevelopment #browser #andriod #app

​Every developer hits a point where they want to build something that pushes Android’s concurrency model to its limits. When standard single-stream…

Every rejection becomes a check

Every app we ship gets reviewed by someone else's QA. Two someones, actually — Apple and Google — each with its own rulebook, and each rulebook come…

Making a vendor's closed-source binary SDK optional at build time

You have an app to ship, and it depends on a vendor's SDK. The vendor sends you a .xcframework for iOS and a bare .aar for Android, both prebuilt, b…

SskCore: Turning Production Pain Into an Android Platform [PART-4]

When Background Work Outlives the Screen That Started It Start a download in an Android app, then leave the screen that started it. That small actio…

Why Kivy Is Still a Reasonable Choice for Python on Android in 2026

Kivy has a reputation on this site, and it isn't a good one. Toy framework. Fine for a prototype. Nothing you'd ship. I shipped a Kivy app to Google…

Why your mobile XPath breaks: a practical ranking of locator strategies for Android, iOS and Flutter

A lot of what gets filed as "flaky mobile test" is a locator that was never stable in the first place. The test passed for three weeks, a developer…

Building a Geofencing Engine: Why I Avoided Persistent Background Location

It happened during a Friday prayer service. The room was silent, the imam was mid-sermon, and suddenly, my pocket erupted with a loud, upbeat ringto…

XopProtector: Building an Open Source Android APK Protection Platform

XopProtector: Building an Open Source Android APK Protection Platform Introduction https://github.com/xopJack/XopProtector Android application secur…

Google's anti-nausea Motion Assist dots finally rolling out on Android

It's currently only appearing on Pixels running Android 17.

Phonebook: a Storybook-style preview gallery for SwiftUI and Compose, built for agents

TL;DR I built Phonebook , an open-source CLI and MCP server that turns existing Jetpack Compose @Preview s and SwiftUI #Preview s into a static, sel…

C2PA Cameras Do Not Survive Contact With Reality

I put a 45M-parameter LLM on a phone. It was 100% confident about a number it invented.

The model returned 1230.0 . The input said 560.00 . Confidence: 1.0000 . Not 0.6. Not "uncertain." One point zero, with a written rationale explaini…

Android SDK for Robot Battery, Power, and Charging Management

Android SDK for Robot Battery, Power, and Charging Management In autonomous mobile robotics (AMR) and industrial automation, power lifecycle managem…

Why scrolling screenshots fall apart on video feeds

I maintain a small Android app that stitches a scrolling screen into one long image. It worked well until people started pointing it at social feeds…

GettiyHikerAPI Working with Osintgram in Termux

Getting HikerAPI Working with Osintgram in Termux I've been experimenting with running Osintgram from Termux on Android and connecting it to HikerAP…

Architecting a background-service-based sound manager that survives Android's Doze mode

It was the final ten minutes of a high-stakes client presentation. I was mid-sentence, explaining a complex system migration, when my phone erupted…

I shipped an alpha notes app where the home screen is the capture field

Miniout is a university notes/tasks app. UI is Spanish-only for now. The idea: you should not pick a folder in the middle of a lecture. Write first;…

Android Storage in 2026: Scoped Storage, SAF, and Why Filesystem Abstractions Still Matter

Android storage has changed dramatically. For a long time, Android developers could think about storage in familiar terms: val file = File ( "/some/…

We Taught a 230M Language Model to Keep Learning on Android

Small language models can now run directly on phones. But most of them stop learning the moment they ship. For personal AI, that feels like a strang…

Architecting Location-Aware Automation Without Killing the Battery

It happened during a quiet, solemn moment at a funeral. I felt the vibration in my pocket, and for a split second, I panicked. I had silenced my pho…

I installed a crash reporter and it crashed my app 100% of the time

This is a submission for DEV's Summer Bug Smash : Smash Stories. TL;DR. I wired Sentry into my Android app behind a careful guard so that a build wi…

Eleven tables, zero indices, and the observability I added afterwards found three more bugs

This is a submission for DEV's Summer Bug Smash : Clear the Lineup. TL;DR. My app recomputes every coaching verdict from raw training logs on read.…

I Built an AI That Auto-Replies to Your Instagram DMs (No Login Required)

I Built an AI That Auto-Replies to Your Instagram DMs (No Login Required) Managing Instagram DMs is a full-time job. Whether you are a small busines…

Everyone is hyping Claude Code. I used Google Jules to build and ship a phone tracking app—entirely from my phone on the beach.

Don't get me wrong: I love Claude Code. I use it every single day. I’ve used its various models to build several apps, utilities, reports, presentat…

App Hardening: One Obfuscation Pipeline Across Every Port

Obfuscating only the Android artifact is a poor security model for a cross-platform application. Codename One App Hardening transforms the merged ap…

Motorola's GrapheneOS phones will launch in 2027 priced higher than Pixels

The private Android-based OS will expand beyond Pixels next year.

I Reverse Engineered Hikvision's APK to Fix Push Notifications on GrapheneOS And Submitted a PR to Fix It For Everyone

I've been dealing with Hikvision camera apps not getting push notifications on GrapheneOS for over a year. I reluctantly ran LineageOS just to keep…

The Third-Generation GUI Builder: One Workspace for Every Form

We have rebuilt the Codename One GUI Builder again. This is its third generation. The interesting part is not another drag-and-drop surface. It is w…