mobile-dev

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.

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.

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.

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

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

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.

Learn how to consistently set Android navigation bar color in Expo using expo-navigation-bar. Fix black on Redmi, dim gray on OnePlus with app.json config, runtime API, and EAS Build for uniform results across devices.

Diagnose and resolve 'Raster Jank Detected' in Flutter SDK 3.29.3 showModalBottomSheet with transparent backgrounds. Use Flutter DevTools for timeline, raster thread analysis, and optimizations like RepaintBoundary for smooth performance.

Why Siri ignores AppShortcuts after force-quitting your iOS app and how to fix it with supportedModes=.any, AppShortcutsProvider, and background execution for voice commands when app isn't running.

Implement reliable Flutter animated splash screen with Lottie on Android 12+. Sync system launch screen, control animation timing using flutter_native_splash, installSplashScreen, and MethodChannel for smooth startup without premature playback or unresponsive taps.

Learn how to optimize Flutter Stack widget performance for game boards with multiple layers. Advanced techniques for smooth rendering and improved frame rates.

Learn how to disable offline mode in applications, Windows systems, gaming platforms, and mobile devices. Step-by-step guides for removing offline functionality.

Learn how to maintain visibility of expanded items in SwiftUI ScrollView with LazyVStack. Solutions include offset tracking, scrollTo, and VStack alternatives.

Fix Bluetooth LE scan issues in Codename One on Android with proper permissions configuration and implementation. Works for iOS too.

Troubleshoot Android App Links exclusions: validate your assetlinks.json, confirm manifest intent-filter scope, and order dynamic_app_link_components correctly for Android 15.

Disable Y-axis scrolling in Highcharts Flutter. Steps: disable chart panning, set yAxis min/max, use afterSetExtremes to lock extremes, or disable yAxis scrollbar (Highstock).