Android Development ご提示いただいた日本向け記事（Android JavaでのMQTT接続と自動再接続）の完全な英語版（海外向け）を作成しました。
Learn how to connect to MQTT in Android using Java and the Eclipse Paho library. Step-by-step guide with sample code for handling auto-reconnection.
Android Development
Android Development 
Android Development ⭐ Android NFC Tag Rewrite: Delete Existing NDEF and Write New Text
Learn how to rewrite NFC tags on Android by deleting existing NDEF data and writing new text records using NdefFormatable and Ndef for safe, reliable updates.
Android Development Android DrawingView Advanced: How to Correct Touch Coordinate Offset in CameraX
Fix touch coordinate offset in CameraX by applying accurate scaling between PreviewView and camera resolution. Learn the complete DrawingView correction method.
Android Development Android Camera Editing: Add Red Marks by Touch and Save the Combined Image
Learn how to draw markers on CameraX preview images and save combined edited photos easily.
Android Development (Android) Encrypting Data Using Stored AES Key, Salt, and IV Files
Encrypt Android data using stored AES key, salt, and IV files with CBC mode for secure storage.
Android Development Playback & Preview Design: Achieving Smooth Performance with Full Encryption on Android
Explore how encrypted image and video playback on Android achieves smooth performance, secure controls, and reliable behavior across devices.
Android Development Building a Fully Offline Encrypted Media App on Android — Lessons Learned with AI
Learn how an offline encrypted Android app was built to protect family media, avoid cloud risks, and deliver smooth secure playback.
Android Development Technical Notes: The Challenges and Breakthroughs of Encrypted Video Streaming on Android
A deep dive into encrypted video streaming on Android, covering performance tuning, secure UI behavior, and real device pitfalls.
Android Development English Version — Design & Specification Decisions Behind the Encrypted Media Vault App
Explore key design trade-offs behind an offline Android encrypted media app, from UI choices to secure storage.
Android Development Encrypted Local Media Vault: Building a Fully Offline, AES‑Protected Photo & Video App for My Family
A fully offline Android vault using AES encryption to protect photos and videos with smooth playback and zero cloud exposure.
Android Development Prevent Android Process Death Using Guard Logic and ADB Testing
How to guard against Android process death and reproduce crashes using ADB kill commands, with safe recovery logic and index validation.
Android Development Why Adoptable Storage Does Not Automatically Use the SD Card
Why Android Adoptable Storage does not automatically use the SD card for app data, and how to enable SD usage with system settings and manifest options.