Widgets and UI :: Flutter en rigle.devhttps://flutter.rigle.dev/en/ejercicios/widgets-ui/index.htmlSolved Flutter widget exercises: ListView.builder, BottomNavigationBar, dark mode with ThemeMode, and async loading with FutureBuilder.HugoenMon, 25 May 2026 00:00:00 +0200AnimationController and Tween in Flutter: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-animation-controller-tween-ejercicio-resuelto/index.htmlSun, 12 Jul 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-animation-controller-tween-ejercicio-resuelto/index.htmlSolved Flutter AnimationController and Tween exercise: explicit animations with CurvedAnimation, AnimatedBuilder and staggered sequences with Interval.CustomPainter in Flutter: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-custom-painter-ejercicio-resuelto/index.htmlWed, 01 Jul 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-custom-painter-ejercicio-resuelto/index.htmlSolved Flutter exercise for CustomPainter: draw a progress ring and a bar chart using the Canvas API from scratch.Hero animations in Flutter: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-hero-navigation-ejercicio-resuelto/index.htmlTue, 07 Jul 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-hero-navigation-ejercicio-resuelto/index.htmlSolved Flutter Hero animations exercise: shared element transitions between routes, image gallery with Hero and flight customization with flightShuttleBuilder.Implicit animations in Flutter: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-animated-container-transitions-ejercicio-resuelto/index.htmlFri, 03 Jul 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-animated-container-transitions-ejercicio-resuelto/index.htmlSolved Flutter exercise for implicit animations: AnimatedContainer, AnimatedOpacity, AnimatedSwitcher and TweenAnimationBuilder with real examples.Lottie in Flutter: solved exercise with JSON animationshttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-lottie-ejercicio-resuelto/index.htmlWed, 15 Jul 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-lottie-ejercicio-resuelto/index.htmlSolved Lottie Flutter exercise: play JSON animations from LottieFiles, control speed, looping, and sync with user interactions.Responsive design in Flutter: solved exercise with LayoutBuilder and MediaQueryhttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-responsive-layout-builder-ejercicio-resuelto/index.htmlMon, 13 Jul 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-responsive-layout-builder-ejercicio-resuelto/index.htmlSolved Flutter responsive design exercise: LayoutBuilder, MediaQuery, OrientationBuilder and adaptive scaffold to adapt the UI to any screen size.SliverAppBar collapsible in Flutter: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-sliver-appbar-collapsible-ejercicio-resuelto/index.htmlThu, 02 Jul 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-sliver-appbar-collapsible-ejercicio-resuelto/index.htmlSolved Flutter exercise for SliverAppBar: collapsible header with image, CustomScrollView, SliverList and parallax scroll effect.Long lists and images in Flutter: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-listas-largas-imagenes-ejercicio-resuelto/index.htmlTue, 23 Jun 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-listas-largas-imagenes-ejercicio-resuelto/index.htmlImprove long-list performance with image caching and efficient builders.Reduce unnecessary rebuilds in Flutter: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-rendimiento-rebuilds-ejercicio-resuelto/index.htmlSun, 21 Jun 2026 00:00:00 +0200https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-rendimiento-rebuilds-ejercicio-resuelto/index.htmlOptimize rendering with const widgets, keys, and state selectors.Dark Mode in Flutter with ThemeMode: solved exercisehttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-theme-dark-mode-ejercicio-resuelto/index.htmlThu, 05 Mar 2026 00:00:00 +0100https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-theme-dark-mode-ejercicio-resuelto/index.htmlSolved Flutter dark mode exercise with ThemeMode to switch between light and dark themes cleanly.BottomNavigationBar in Flutter: solved exercise with IndexedStackhttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-bottom-navigation-bar-ejercicio-resuelto/index.htmlSat, 14 Feb 2026 00:00:00 +0100https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-bottom-navigation-bar-ejercicio-resuelto/index.htmlSolved BottomNavigationBar Flutter exercise using IndexedStack to preserve tab state between sections.ListView.builder in Flutter: solved exercise with dynamic listhttps://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-listview-builder-ejercicio-resuelto/index.htmlWed, 11 Feb 2026 00:00:00 +0100https://flutter.rigle.dev/en/ejercicios/widgets-ui/flutter-listview-builder-ejercicio-resuelto/index.htmlSolved ListView.builder Flutter exercise to render long dynamic lists efficiently with reusable item widgets.