1.完整ui页面
可以借鉴一些使用案例：
return Placeholder();
/// A widget that draws a box that represents where other widgets will one day
/// be added.
///
/// This widget is useful during development to indicate that the interface is
/// not yet complete.
///
/// By default, the placeholder is sized to fit its container. If the
/// placeholder is in an unbounded space, it will size itself according to the
/// given [fallbackWidth] and [fallbackHeight].
///
/// {@youtube 560 315 https://www.youtube.com/watch?v=LPe56fezmoo}
class Placeholder extends StatelessWidget {
/// Creates a widget which draws a box.
const Placeholder({
super.key,
this.color = const Color(0xFF455A64), // Blue Grey 700
this.strokeWidth = 2.0,
this.fallbackWidth = 400.0,
this.fallbackHeight = 400.0,
this.child
});
/// The color to draw the placeholder box.
final Color color;
/// The width of the lines in the placeholder box.
final double strokeWidth;
/// The width to use when the placeholder is in a situation with an unbounded
/// width.
///
/// See also:
///
/// * [fallbackHeight], the same but vertically.
final double fallbackWidth;
/// The height to use when the placeholder is in a situation with an unbounded
/// height.
///
/// See also:
///
/// * [fallbackWidth], the same but horizontally.
final double fallbackHeight;
/// The [child] contained by the placeholder box.
///
/// Defaults to null.
final Widget? child;
@override
Widget build(BuildContext context) {
return LimitedBox(
maxWidth: fallbackWidth,
maxHeight: fallbackHeight,
child: CustomPaint(
size: Size.infinite,
painter: _PlaceholderPainter(
color: color,
strokeWidth: strokeWidth,
),
child: child,
),
);
}
@override
void debugFillProperties(DiagnosticPropertiesBuilder properties) {
super.debugFillProperties(properties);
properties.add(ColorProperty('color', color, defaultValue: const Color(0xFF455A64)));
properties.add(DoubleProperty('strokeWidth', strokeWidth, defaultValue: 2.0));
properties.add(DoubleProperty('fallbackWidth', fallbackWidth, defaultValue: 400.0));
properties.add(DoubleProperty('fallbackHeight', fallbackHeight, defaultValue: 400.0));
properties.add(DiagnosticsProperty<Widget>('child', child, defaultValue: null));
}
}
一些statefulWidget
2.flutter 的sdk存储效果
持久化存储
Flutter入门进阶之旅（十二）Flutter 数据存储_flutter storage-CSDN博客
数据库存储flutter中数据库(Drift)的使用_flutter 数据库_朽木成才的博客-CSDN博客
3.声网，专做sdk产品
基于声网 Flutter SDK 实现互动直播 - 知乎 (zhihu.com)
声网旗下，十分完善的示例文档介绍1 对 1 互动教学 - 文档中心 - 声网Agora (shengwang.cn)
声网sdk自制appId和token的方式
使用 Token 鉴权 - 视频通话 (Legacy) - 文档中心 - 声网Agora (shengwang.cn)
