Android 17 Is Here — Compose-First, Adaptive-First, AppFunctions, and What Breaks at SDK 37
Android 17 (Cinnamon Bun, API 37) landed June 16, 2026 — and it's the most opinionated release in years. Google isn't just shipping features; it's lay...
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Top 30 Kotlin Interview Questions — From Basics to Coroutines
The 30 most commonly asked Kotlin interview questions with clear answers and code examples. Covers basics (val/var, null safety, string interpolation)...
ANDROID 16 IS QUIET — BUT ONE OF THE MOST IMPORTANT RELEASES FOR DEVELOPERS
Android 16 (API level 36) is less about new UI features and more about making app behavior predictable and reliable. It introduces refinements in navi...
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Linked Lists Explained: A Visual, Beginner-to-Expert Guide (Java & Kotlin)
A linked list is just boxes and arrows — a piece of data, and a note telling you where the next piece lives. This guide draws every concept as a diagr...
Valid Anagram — Sorting, HashMap Counting, and the 26-Slot Array Optimisation
Two Sum traded space for time with a HashMap. Buy & Sell Stock tracked a running minimum. Valid Anagram teaches the third must-know pattern: counting....
Best Time to Buy and Sell Stock — Brute Force, Single-Pass Insight, and the Interview Script
Two Sum taught us to trade space for time with a HashMap. This problem teaches the opposite — sometimes you just remember the right one thing as you w...
Two Sum — The Complete Interview Walkthrough (Brute Force, HashMap, and the Conversation an Interviewer Wants to Hear)
If you're an Android dev prepping for interviews, the first DSA round usually starts with one problem: Two Sum. It's the warm-up every interviewer rea...
Android 17 Is Here — Compose-First, Adaptive-First, AppFunctions, and What Breaks at SDK 37
Android 17 (Cinnamon Bun, API 37) landed June 16, 2026 — and it's the most opinionated release in years. Google isn't just shipping features; it's lay...
DNS Spoofing Testing on Android — What It Is, Why It Matters, and 4 Hands-On Lab Approaches
When your app calls api.mybank.com, who decides which IP that resolves to? On compromised Wi-Fi, the attacker controls DNS and points your domain at t...
Kotlin Coroutines & Flow from First Principles — The Complete Mental Model for Android
This is the post I wish existed when I started using coroutines. Not the API docs — those are fine. What I needed was the mental model: why does each ...
Kotlin Coroutines & Flow in Production — The 10 Anti-Patterns That Ship and How to Fix Them
The footgun-to-insight ratio with coroutines is unusually high. The API is small; the ways to misuse it are many; the bugs are subtle and pass code re...
Why Your Push Notifications Work on Pixel and Fail on Xiaomi — FCM Across OEMs
I don't get notifications until I open the app. Then they all arrive at once. My friend on iPhone gets them instantly. Your app is broken." The user i...
Secure File Upload on Android — Chunked, Resumable, Encrypted Uploads for Banking & Enterprise Apps
Upload a file" sounds basic, and the tutorials treat it that way: build a MultipartBody.Part, hand it to Retrofit, done. Then you ship it to a banking...
Google Maps SDK on Android — Implementation Deep-Dive Beyond the Tutorials
The Google Maps tutorials online stop at exactly the wrong place — drop a map, add one marker, done. They don't teach what happens when you build a pr...
OEM Battery Optimization Killing Your App — A Survival Guide for Samsung, Xiaomi, Huawei, and the ColorOS Family
The fitness app stops counting my steps after a few hours. Started happening on my new Samsung — my old Pixel was fine." The user thinks the app is br...