flutter

Learn how to calculate Stripe processing fees in Flutter when card country is unknown to ensure merchants receive exactly £10 while customers pay total amount including variable fees.

Learn how to handle Stripe partial refunds for incomplete split payments with time limits in Flutter apps. Use PaymentIntents, flutter_stripe, cron jobs, webhooks, and Stripe refund API for auto-refunds on timeouts.

Resolve 'The method 'fromJson' isn't defined for SubOne/SubTwo' in Flutter json_serializable nested classes. Add factory delegates with explicitToJson for self-referential lists. Full code, build_runner steps, and best practices.

Resolve 16KB page size warnings, zip-alignment errors, and Android 12 compatibility in Flutter apps for Google Play Store uploads. Upgrade AGP, enable uncompressed native libs, update plugins, and verify ELF alignments with readelf and bundletool.

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

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.

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.

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).

Complete guide to implementing WebSocket in Flutter for real-time betting odds comparison using odds-api.io API with connection stability and error handling.

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.