I'm having this issue when i Implement flutter Youtube Video Player but if i remove video player then everything working perfectly. I also try to implement video player with listview then this error doesn't appear. It's strange behavior for me. I try to find this issue on google but didn't find anything related to my issue.
Here's my code
Widget dashboard({context}) {
var myscreen = MediaQuery.of(context);
return WillPopScope(
onWillPop: () async => backPressed(),
child: AnimatedPositioned(
top: 0,
bottom: 0,
left: isCollapsed ? 0 : 0.5 * myscreen.size.width,
right: isCollapsed ? 0 : -0.4 * myscreen.size.width,
duration: animationDuration,
child: ScaleTransition(
scale: _scaleAnimation,
child: Material(
borderRadius: isCollapsed
? BorderRadius.circular(0)
: BorderRadius.circular(40),
elevation: 8,
color: appbarcolor,
child: SafeArea(
child: Container(
height: myscreen.size.height,
width: myscreen.size.width,
child: Column(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
IconButton(
onPressed: menuButton,
icon: Icon(
isCollapsed ? Icons.menu : Icons.arrow_back_ios,
),
iconSize: 27,
),
RichText(
text: TextSpan(
text: "WisBig",
style: TextStyle(
color: Colors.green,
fontSize: 21,
fontWeight: FontWeight.bold,
),
children: <TextSpan>[
TextSpan(
text: " Reward",
style: TextStyle(
color: Colors.deepOrangeAccent,
fontSize: 21,
fontWeight: FontWeight.bold,
),
),
],
),
),
IconButton(
icon: SvgPicture.asset(
"images/svg/bell.svg",
height: 23,
width: 23,
),
onPressed: () {
MenuButtons(context: context).notiBTN();
},
),
],
),
SingleChildScrollView(
scrollDirection: Axis.vertical,
physics: ScrollPhysics(),
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
InkWell(
onTap: () {
String url = _slides[slideIndex].url;
MenuButtons(context: context)
.slidesUrlOpener(url: url);
},
child: Container(
clipBehavior: Clip.antiAliasWithSaveLayer,
height: myscreen.size.height / 4.3,
margin: EdgeInsets.symmetric(
horizontal: sliderHorizatal,
vertical: sliderVertical,
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(12.0),
),
child: isSlideLoaded
? new Swiper(
controller: swiperController,
onIndexChanged: (index) {
slideIndex = index;
},
scrollDirection: Axis.horizontal,
curve: Curves.easeIn,
itemBuilder:
(BuildContext context, int index) {
return CachedNetworkImage(
imageUrl: _slides[index].imageUrl,
fit: BoxFit.fill,
);
},
itemCount: _slides.length == 0
? 0
: _slides.length,
pagination: new SwiperPagination(),
autoplay: true,
autoplayDelay: 2000,
)
: Container(
height: 150,
width: double.infinity,
margin: EdgeInsets.symmetric(
horizontal: 20,
),
child: circle(),
),
),
),
SizedBox(
height: 6,
),
Container(
width: myscreen.size.width,
margin: EdgeInsets.symmetric(
horizontal: sliderHorizatal,
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(12.0),
),
clipBehavior: Clip.antiAliasWithSaveLayer,
child: isSlideLoaded
? YoutubePlayer(
controller: YoutubePlayerController(
initialVideoId:
YoutubePlayer.convertUrlToId(
youtubeList[0]['url'],
),
flags: YoutubePlayerFlags(
// hideControls: true,
controlsVisibleAtStart: true,
autoPlay: false,
forceHD: false,
),
),
showVideoProgressIndicator: true,
progressIndicatorColor: Colors.white,
progressColors: ProgressBarColors(
playedColor: Colors.blue,
handleColor: Colors.blueAccent,
),
)
: circle(),
),
SizedBox(
height: 6,
),
Container(
margin: EdgeInsets.symmetric(
horizontal: cardsContainerHorizatal,
vertical: cardsContainerVertical,
),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
cardView(
image: card1[1],
text: card1[0],
button: MenuButtons(context: context).spinBTN,
context: context,
),
cardView(
image: card2[1],
text: card2[0],
button: MenuButtons(context: context).postBTN,
context: context,
),
],
),
),
SizedBox(
height: myscreen.size.height / 200,
),
Container(
margin: EdgeInsets.symmetric(
horizontal: cardsContainerHorizatal,
vertical: cardsContainerVertical,
),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
cardView(
image: card3[1],
text: card3[0],
button:
MenuButtons(context: context).downloadBTN,
context: context,
),
cardView(
image: card4[1],
text: card4[0],
button: MenuButtons(context: context).earnWis,
context: context,
),
],
),
),
],
),
),
],
),
),
),
),
),
),
);
}
question from:
https://stackoverflow.com/questions/65872070/flutter-screen-blinking-on-scaletransition 
