OpenFlutter/flutter_screenutil
Flutter Screenutil
flutter_screenutil 是一个用于 Flutter 的响应式 UI 框架和自适应布局工具。它提供了一套基于参考设计缩放布局尺寸和字体的系统，以确保在不同屏幕分辨率和设备上保持一致的比例。
该工具包作为屏幕指标提供程序，可获取实时设备属性，包括屏幕宽度、高度、像素密度和安全区域尺寸。它专门处理设备方向切换和分屏模式更新时的布局适配。
该框架涵盖了自适应排版管理、布局尺寸缩放和屏幕指标监控。它包含在屏幕调整大小时控制 UI 重绘的机制，并应用缩放限制，以在超大或超小显示屏上保持视觉完整性。
Features
- Reference-Based Scaling - Calculates widget sizes by multiplying design-draft dimensions by a ratio derived from the current screen size.
- Responsive UI Design - Scales widgets and layouts based on design drafts to ensure consistent proportions across different screen resolutions.
- Multi-Device Layout Adapters - Handles screen size changes and orientation shifts to ensure the UI fits various mobile device screens.
- Layout Scaling Utilities - Calculates widget sizes and radii based on reference designs to ensure consistent proportions across resolutions.
- Responsive UI Frameworks - Provides a toolkit for scaling layout dimensions and fonts in Flutter based on a reference design.
- Screen Metadata Retrieval - Provides programmatic access to real-time device properties such as screen width, height, and pixel density.
- Adaptive Typography Tools - Automatically adjusts font sizes based on screen dimensions and system zoom settings to maintain readability.
- Font Size Range Clampers - Scales text sizes based on screen metrics while applying minimum and maximum pixel bounds to prevent extreme sizing.
- Device Metrics Retrieval - Provides real-time retrieval of screen width, height, pixel density, and safe area dimensions to drive responsive layout scaling.
- Screen-Metric Based Font Scaling - Scales text based on screen dimensions and system zoom settings using defined minimum and maximum bounds.
- Layout Recalculation Triggers - Listens to system-level screen change notifications to trigger layout recalculations during orientation or window shifts.
- Adaptive UI Layouts - Adjusts UI proportions and font sizes automatically during device orientation changes or split-screen mode updates.
- Safe Area Metrics - Retrieves precise device-specific inset values, including notches and system padding, to calculate usable screen area.
- Split-Screen Layout Adaptation - Adjusts UI dimensions and layout calculations in real time when the application is used in split-screen mode.
- Screen Dimension Monitors - Detects changes in screen dimensions to trigger layout updates during device orientation or split-screen transitions.
- Rebuild Optimization Tools - Limits widget tree updates during screen resizing by defining rebuild factors to optimize performance.
- UI Element Scaling Constraints - Implements scaling limits to maintain visual integrity on extremely large or small displays.
