How to receive state in App Bar using bloc
I have an list view Builder in scaffold widget. I need to count list size and display list size in App Bar. I can't get state in APP Bar using bloc pattern. I can get state except App Bar. How can i get and change state in App Bar using Bloc Pattern.
flutter asked Jan 18 at 13:55
VinothkumarVinothkumar
32
add a comment |
I have an list view Builder in scaffold widget. I need to count list size and display list size in App Bar. I can't get state in APP Bar using bloc pattern. I can get state except App Bar. How can i get and change state in App Bar using Bloc Pattern.
flutter asked Jan 18 at 13:55
VinothkumarVinothkumar
32
Why can't you get the state in yourAppBar? Just wrap yourScaffoldin aStreamBuilder.
– Jordan Davies
Jan 18 at 14:03
I am using bloc builder to change state. I have written bloc builder with in scaffold widget.
– Vinothkumar
Jan 18 at 14:06
Yes but you can just move your Scaffold widget so it is within the bloc builder.
– Jordan Davies
Jan 18 at 14:14
Could you please explain me how can i do that.
– Vinothkumar
Jan 18 at 14:30
If you update your question to include some code, I'll try and show you.
– Jordan Davies
Jan 18 at 14:47
add a comment |
I have an list view Builder in scaffold widget. I need to count list size and display list size in App Bar. I can't get state in APP Bar using bloc pattern. I can get state except App Bar. How can i get and change state in App Bar using Bloc Pattern.
flutter asked Jan 18 at 13:55
VinothkumarVinothkumar
32
I have an list view Builder in scaffold widget. I need to count list size and display list size in App Bar. I can't get state in APP Bar using bloc pattern. I can get state except App Bar. How can i get and change state in App Bar using Bloc Pattern.
flutter flutter asked Jan 18 at 13:55
VinothkumarVinothkumar
32
asked Jan 18 at 13:55
VinothkumarVinothkumar
32
asked Jan 18 at 13:55
VinothkumarVinothkumar
32
asked Jan 18 at 13:55
VinothkumarVinothkumar
32
asked Jan 18 at 13:55
VinothkumarVinothkumar
32
32
Why can't you get the state in yourAppBar? Just wrap yourScaffoldin aStreamBuilder.
– Jordan Davies
Jan 18 at 14:03
I am using bloc builder to change state. I have written bloc builder with in scaffold widget.
– Vinothkumar
Jan 18 at 14:06
Yes but you can just move your Scaffold widget so it is within the bloc builder.
– Jordan Davies
Jan 18 at 14:14
Could you please explain me how can i do that.
– Vinothkumar
Jan 18 at 14:30
If you update your question to include some code, I'll try and show you.
– Jordan Davies
Jan 18 at 14:47
add a comment |
Why can't you get the state in yourAppBar? Just wrap yourScaffoldin aStreamBuilder.
– Jordan Davies
Jan 18 at 14:03
I am using bloc builder to change state. I have written bloc builder with in scaffold widget.
– Vinothkumar
Jan 18 at 14:06
Yes but you can just move your Scaffold widget so it is within the bloc builder.
– Jordan Davies
Jan 18 at 14:14
Could you please explain me how can i do that.
– Vinothkumar
Jan 18 at 14:30
If you update your question to include some code, I'll try and show you.
– Jordan Davies
Jan 18 at 14:47
Why can't you get the state in your
AppBar? Just wrap your Scaffold in a StreamBuilder.– Jordan Davies
Jan 18 at 14:03
Why can't you get the state in your
AppBar? Just wrap your Scaffold in a StreamBuilder.– Jordan Davies
Jan 18 at 14:03
I am using bloc builder to change state. I have written bloc builder with in scaffold widget.
– Vinothkumar
Jan 18 at 14:06
I am using bloc builder to change state. I have written bloc builder with in scaffold widget.
– Vinothkumar
Jan 18 at 14:06
Yes but you can just move your Scaffold widget so it is within the bloc builder.
– Jordan Davies
Jan 18 at 14:14
Yes but you can just move your Scaffold widget so it is within the bloc builder.
– Jordan Davies
Jan 18 at 14:14
Could you please explain me how can i do that.
– Vinothkumar
Jan 18 at 14:30
Could you please explain me how can i do that.
– Vinothkumar
Jan 18 at 14:30
If you update your question to include some code, I'll try and show you.
– Jordan Davies
Jan 18 at 14:47
If you update your question to include some code, I'll try and show you.
– Jordan Davies
Jan 18 at 14:47
add a comment |
1 Answer
1
active
oldest
votes
You should put a listener on your List; fyi... this is a feature built into Streambuilder or ListView.builder and perform setState((){ publicInt = list.length}). Instantiate a public int variable of publicInt that will update every time list.length changes and add it to your AppBar title. Similar to the code below...
int publicInt;
@override
Widget build (BuildContext ctxt) {
return new Scaffold(
appBar: new AppBar(title: new Text("Dynamic Demo # $publicInt"),),
body: new ListView.builder
(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int index) {
setState((){ publicInt = list.length});
}
)
),
);
}
}
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You should put a listener on your List; fyi... this is a feature built into Streambuilder or ListView.builder and perform setState((){ publicInt = list.length}). Instantiate a public int variable of publicInt that will update every time list.length changes and add it to your AppBar title. Similar to the code below...
int publicInt;
@override
Widget build (BuildContext ctxt) {
return new Scaffold(
appBar: new AppBar(title: new Text("Dynamic Demo # $publicInt"),),
body: new ListView.builder
(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int index) {
setState((){ publicInt = list.length});
}
)
),
);
}
}
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
add a comment |
You should put a listener on your List; fyi... this is a feature built into Streambuilder or ListView.builder and perform setState((){ publicInt = list.length}). Instantiate a public int variable of publicInt that will update every time list.length changes and add it to your AppBar title. Similar to the code below...
int publicInt;
@override
Widget build (BuildContext ctxt) {
return new Scaffold(
appBar: new AppBar(title: new Text("Dynamic Demo # $publicInt"),),
body: new ListView.builder
(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int index) {
setState((){ publicInt = list.length});
}
)
),
);
}
}
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
add a comment |
You should put a listener on your List; fyi... this is a feature built into Streambuilder or ListView.builder and perform setState((){ publicInt = list.length}). Instantiate a public int variable of publicInt that will update every time list.length changes and add it to your AppBar title. Similar to the code below...
int publicInt;
@override
Widget build (BuildContext ctxt) {
return new Scaffold(
appBar: new AppBar(title: new Text("Dynamic Demo # $publicInt"),),
body: new ListView.builder
(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int index) {
setState((){ publicInt = list.length});
}
)
),
);
}
}
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
You should put a listener on your List; fyi... this is a feature built into Streambuilder or ListView.builder and perform setState((){ publicInt = list.length}). Instantiate a public int variable of publicInt that will update every time list.length changes and add it to your AppBar title. Similar to the code below...
int publicInt;
@override
Widget build (BuildContext ctxt) {
return new Scaffold(
appBar: new AppBar(title: new Text("Dynamic Demo # $publicInt"),),
body: new ListView.builder
(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int index) {
setState((){ publicInt = list.length});
}
)
),
);
}
}
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
answered Jan 18 at 17:57
Charles JrCharles Jr
8371638
8371638
add a comment |
add a comment |
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Why can't you get the state in your
AppBar? Just wrap yourScaffoldin aStreamBuilder.– Jordan Davies
Jan 18 at 14:03
I am using bloc builder to change state. I have written bloc builder with in scaffold widget.
– Vinothkumar
Jan 18 at 14:06
Yes but you can just move your Scaffold widget so it is within the bloc builder.
– Jordan Davies
Jan 18 at 14:14
Could you please explain me how can i do that.
– Vinothkumar
Jan 18 at 14:30
If you update your question to include some code, I'll try and show you.
– Jordan Davies
Jan 18 at 14:47