Flutter - CircularProgressIndicator won't stop executing - flutter

Question

My problem is that the CircularProgressIndicator won't stop buffering. My goal is when the video detects a lagging status then the CircularProgressIndicator will show and when it plays again then the CircularProgressIndicator will stop showing.
bool vidBuffering = true;
void buffer() {
setState(() {
vidBuffering = !vidBuffering;
});
}
This is inside a widget where I call the vidBuffering
Widget _buildPlayStack() {
return Stack(
children: [
_buildPlay(),
child: FlatButton(
onPressed: () => setState(() {
_vidController.value.isPlaying ? _vidController.pause() :_vidController.play();
}),
child: Center(
child: (_vidController.value.isPlaying)
? Icon(Icons.pause, color: Colors.green)
: Icon(Icons.play_arrow, color: Colors.green),
),
),
Center(
child: _vidBuffering
? const CircularProgressIndicator()
: null),
],
);
}
Widget _buildPlay() {
return Container(
child: AspectRatio(
aspectRatio: _vidController.value.aspectRatio,
child: VideoPlayer(_controller),
),
);
}

Answer 1

You should be used StreamBuilder for update only Loader
For Example :
class Demo extends StatefulWidget {
#override
_DemoState createState() => _DemoState();
}
class _DemoState extends State<Demo> {
bool vidBuffering = true;
StreamController streamControllerBuffering = StreamController();
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
_buildPlayStack(),
RaisedButton(
onPressed: () => buffer(),
child: Text(vidBuffering ? 'Hide' : 'Show'),
)
],
),
),
);
}
void buffer() {
vidBuffering = !vidBuffering;
streamControllerBuffering.sink.add(vidBuffering);
}
Widget _buildPlayStack() {
return Stack(
children: [
_buildPlay(),
FlatButton(
onPressed: () => setState(() {
/*_vidController.value.isPlaying
? _vidController.pause()
: _vidController.play();*/
}),
child: Center(
child: (/*_vidController.value.isPlaying*/ true)
? Icon(Icons.pause, color: Colors.green)
: Icon(Icons.play_arrow, color: Colors.green),
),
),
Center(
child: StreamBuilder(
initialData: true,
stream: streamControllerBuffering.stream,
builder: (builder, snapshot) {
if (snapshot.hasData && snapshot.data) {
return CircularProgressIndicator();
} else {
Offstage();
}
return Offstage();
}),
),
],
);
}
Widget _buildPlay() {
return Container(
height: 200,
width: 200,
color: Colors.amber,
);
}
#override
void dispose() {
streamControllerBuffering.close();
super.dispose();
}
}