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The method '[]' can't be unconditionally invoked because the receiver can be 'null'

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Mostafa Saad answered on September 20, 2021 Popularity 10/10 Helpfulness 2/10

answer The method '[]' can't be unconditionally invoked because the receiver can be 'null'

related the method 'copywith' can't be unconditionally invoked because the receiver can be 'null'

related The method '[]' can't be unconditionally invoked because the receiver can be 'null'

The method '[]' can't be unconditionally invoked because the receiver can be 'null'

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you can just add the type of the future you are using like this one

//this one wont work

body: FutureBuilder(
            future:getDataFromJason(),
            builder: (ctx, snapShot) {
              if(snapShot.connectionState==ConnectionState.waiting){
                return Center(child: CircularProgressIndicator());
              }
              else{}

//but this will just add the type of futureBuilder 

body: FutureBuilder<dynamic>(
            future:getDataFromJason(),
            builder: (ctx, snapShot) {
              if(snapShot.connectionState==ConnectionState.waiting){
                return Center(child: CircularProgressIndicator());
              }
              else{

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Source: Grepper

Tags: add defined receiver whatever when

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Contributed on Sep 20 2021

Mostafa Saad

0 Answers Avg Quality 2/10

Closely Related Answers

the method 'copywith' can't be unconditionally invoked because the receiver can be 'null'

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style: AppBarTheme().titleTextStyle?.copyWith(fontSize: 20),
// just add a ? before the .

Popularity 3/10 Helpfulness 7/10 Language whatever

Source: Grepper

Tags: receiver whatever

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Contributed on Dec 10 2022

Abdallah Melhem

0 Answers Avg Quality 2/10

The method '[]' can't be unconditionally invoked because the receiver can be 'null'

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class _HomeState extends State<Home> {
  @override
  Widget build(BuildContext context) {
    final data = ModalRoute.of(context)?.settings.arguments as Map?;

    return Scaffold(
      body: SafeArea(
          child: Column(
        children: <Widget>[
          Text(
            data?['location'] ?? "default value",
            style: TextStyle(
              fontSize: 20.0,
              letterSpacing: 2.0,
            ),
          ),
          SizedBox(height: 20.0),
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              if (data?['location'] != null)
                Text(
                  data!['location'],
                  style: TextStyle(
                    fontSize: 20.0,
                    letterSpacing: 2.0,
                  ),
                ),
            ],
          )
        ],
      )),
    );
  }
}

Popularity 9/10 Helpfulness 3/10 Language whatever

Source: stackoverflow.com

Tags: receiver receive

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Contributed on Jul 08 2022

Ayodeji Onibuje

0 Answers Avg Quality 2/10

The method '[]' can't be unconditionally invoked because the receiver can be 'null'

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The method '[]' can't be unconditionally invoked because the receiver can be 'null'

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the method 'copywith' can't be unconditionally invoked because the receiver can be 'null'

The method '[]' can't be unconditionally invoked because the receiver can be 'null'

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