flutter闪烁动画效果

闪烁浮动效果：


import 'package:flutter/material.dart';class FlickerAnimation extends StatefulWidget {final String iconPath;FlickerAnimation({this.iconPath});@overrideState<StatefulWidget> createState() {// TODO: implement createStatereturn _FlickerAnimation();}
}
class _FlickerAnimation extends State<FlickerAnimation> with TickerProviderStateMixin{/*height = Tween<double>(begin:.0 ,end: 300.0,).animate(CurvedAnimation(parent: controller,curve: Interval(0.0, 0.6, //间隔，前60%的动画时间curve: Curves.ease,),),);*//*color = ColorTween(begin:Colors.green ,end:Colors.red,).animate(CurvedAnimation(parent: controller,curve: Interval(0.0, 0.6,//间隔，前60%的动画时间curve: Curves.ease,),),);*//*padding = Tween<EdgeInsets>(begin:EdgeInsets.only(left: .0),end:EdgeInsets.only(left: 100.0),).animate(CurvedAnimation(parent: controller,curve: Interval(0.6, 1.0, //间隔，后40%的动画时间curve: Curves.ease,),),);*/AnimationController animationController;Animation<double> opacity;Animation<EdgeInsets> padding;@overridevoid initState() {// TODO: implement initStatesuper.initState();animationController = new AnimationController(duration: Duration(milliseconds: 630),vsync: this);opacity = Tween<double>(begin: 0.0 ,end: 1.0,).animate(CurvedAnimation(parent: animationController,curve: Interval(0.0, 1.0, //间隔，前60%的动画时间curve: Curves.ease,),),);padding = Tween<EdgeInsets>(begin:EdgeInsets.only(bottom: .0),end:EdgeInsets.only(bottom: 20.0),).animate(CurvedAnimation(parent: animationController,curve: Interval(0.0, 1.0, //间隔，后40%的动画时间curve: Curves.ease,),),);animationController.addStatusListener((status) {if(status == AnimationStatus.completed){animationController.reverse();}else if(status == AnimationStatus.dismissed){animationController.forward();}});animationController.forward();}@overridevoid dispose() {// TODO: implement disposeanimationController.dispose();super.dispose();}@overrideWidget build(BuildContext context) {// TODO: implement buildreturn onActivityCreate(context);}@overrideonActivityCreate(BuildContext context) {// TODO: implement onActivityCreatereturn AnimatedBuilder(builder: _buildAnimation,animation: animationController);}Widget _buildAnimation(BuildContext context, Widget child) {return Container(padding: padding.value,alignment: Alignment.bottomCenter,height: 80.0,width: 80.0,//color: Colors.red,child: Opacity(child: ShaderMask(shaderCallback: (rect) {return LinearGradient(begin: Alignment.topCenter,end: Alignment.bottomCenter,colors: [Colors.black, Colors.transparent],).createShader(Rect.fromLTRB(0.0, 0.0, rect.width, rect.height));},blendMode: BlendMode.dstIn,child: Image.asset(widget.iconPath,width: 50.0,height: 50.0),),opacity: opacity.value,));}
}

引用：

Container(color: Colors.white,width: 200.0,height: 200.0,child: FlickerAnimation(iconPath: 'assets/image/f_image.webp',),)

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