Mobile Dev

Fix Flutter iOS IPA build failure with 'Build input file cannot be found' for path_provider_foundation_privacy.bundle and image_picker_ios. Upgrade Flutter or add dummy executables workaround for Xcode 15.2 CopySwiftLibs issue.

iOS 26 UISlider .valueChanged event is blank, event.allTouches nil preventing phase detection (.began, .moved, .ended). Fixes: use touch events (.touchDown, .touchUpInside) or subclass UISlider overriding tracking methods.

Understand the difference between px, dp (dip), and sp units in Android UI development. Learn when to use android dp for layouts, android sp for text, and px for pixels, with conversion formulas and best practices.

Discover why Android native malloc allows 1GB+ overcommit beyond RAM without access, but lmkd kills the process during memset due to page faults and PSI pressure. No low memory callbacks; debug with mallinfo and heapprofd.

Step-by-step guide to set up NTAG213 password protection using Android NFC NfcA. Configure PWD, PACK, AUTH0, ACCESS bytes, perform PWD_AUTH, and test writes with transceive examples and error handling.

Used Chinese phones (Android 8+) safe to root without official bootloader unlocks: OnePlus, POCO F1, Snapdragon Redmi Note. Pre-purchase checks and root methods.

Run fio with libaio on Android for raw UFS performance benchmarking, bypassing filesystem effects. Custom NDK builds, root access, sync/psync alternatives, kernel tracing, and vendor tools for seq/rand bandwidth and latency.

Resolve Xcode 26 error with shallow TensorFlowLiteC.xcframework on macOS. Rebuild using Bazel ios_fat config for unshallow bundle with proper Versions/Current/Resources/Info.plist structure. Step-by-step guide to fix iOS-style frameworks.

Step-by-step guide to set launcher icon for Android apps using Android Studio Image Asset Studio. Covers icon sizes (mdpi 48x48 to xxxhdpi 192x192), adaptive icons, densities, and manifest updates for perfect scaling across devices.

Resolve 'No matching client found' error for Google Analytics in Android apps with multiple product flavors and custom build types. Use one google-services.json with multiple clients for all variants without separate files.

Learn how to align views at the bottom of the screen in Android while making the first item fill remaining space using LinearLayout weights or ConstraintLayout.

Learn how to install ADB (Android Debug Bridge) on macOS for terminal usage. Complete beginner's guide covering Homebrew and manual installation, USB debugging setup, and essential commands.

Learn how to convert hexadecimal color strings to Flutter Color objects. Explore manual methods, extensions, utility classes, and packages for flutter hex color implementation.

Learn how to fix Gradle configuration errors in multi-module Android applications using Kotlin DSL and version catalogs.

Troubleshoot Xcode archive menu disabled for Ad Hoc distribution. Learn to fix provisioning profile issues, refresh profiles, and resolve certificate mismatches.

Android Studio shows AppMetrica plugin error 451 due to export controls. Learn how to confirm the 451, install from disk, or integrate the AppMetrica SDK safely.

Learn to retrieve Android SDK version and API level programmatically using Build.VERSION.SDK_INT in Java and Kotlin. Includes runtime checks, compatibility table, and best practices for android sdk versions and android api levels.

Resolve duplicate class errors like org.hamcrest.BaseDescription in Android Gradle projects when adding json-simple. Learn excludes, resolutionStrategy force, and substitution for Gradle 8.3 and Android Studio Otter 2.

Achieve smooth progressive blur in React Native CLI: blend intensity from top/bottom edges to sharp center using MaskedView, BlurView, and LinearGradient. Code examples, libraries, and troubleshooting for no hard edges.

Fix SwiftUI TextField in sheets requiring multiple taps for keyboard due to onAppear state loading, unwanted text highlight. Use @FocusState, UIKit wrappers, pre-load state for instant iOS response.