flutter listview builder
List<String> litems = ["1","2","Third","4"];
body: new ListView.builder
(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int index) {
return new Text(litems[index]);
}
)flutter listview builder
List<String> litems = ["1","2","Third","4"];
body: new ListView.builder
(
itemCount: litems.length,
itemBuilder: (BuildContext ctxt, int index) {
return new Text(litems[index]);
}
)flutter future builder
FutureBuilder<String>(
future: _fetchNetworkCall, // async work
builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
switch (snapshot.connectionState) {
case ConnectionState.waiting: return Text('Loading....');
default:
if (snapshot.hasError)
return Text('Error: ${snapshot.error}');
else
return Text('Result: ${snapshot.data}');
}
},
),flutter future builder
//The correct way to use FutureBuilder is to instantiate the future first,
//then use the variable in the FutureBuilder
//Check out: https://www.youtube.com/watch?v=LYN46233cws for more info
//Instantiate the future
Future _getData;
//In initState assign you future function to the future
@override
void initState() {
_getData = _getUserData();
super.initState();
}
//Define your async function
_getUserData() async{
return await getAsyncDataFromServer();
}
//Use the instantiated future variable in your future builder
FutureBuilder(
future: _getData;
builder: (BuildContext context, AsyncSnapshot snapshot){
if(snapshot.connectionState == ConnectionState.done){
//Build you UI
}else{
return Center(child: CircularProgressIndicator());
}
},
);Copyright © 2021 Codeinu
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