CODEWITHSUNDEEP
flutter
rameez khan
rameez khan

Reputation: 359

Flutter how to show array data in text widget by for loop

I have simple list in which some string are available. I just to need to show all strings in Text widget by for loop

I try like this

List datesData = [{
  '09:00 am - 10:00 am',
  '10:00 am - 11:00 am',
  '11:00 am - 12:00 am',
  '12:00 am - 01:00 am',
  '01:00 am - 02:00 am',
  '02:00 am - 03:00 am',
  '03:00 am - 04:00 am',
  '04:00 am - 05:00 am'
}];

for(int i = 0; i < 8; i++){
     Container(
       child: Text(datesData(i)),
     );
}

ITs show error in datesData The expression doesn't evaluate to a function, so it can't be invoked.

Also in don't want to define length of for lopp like for(int i = 0; i < 8; i++) i need to check it automatically that it has 8 strings.

Upvotes: 2

Views: 6061

Answers (4)

Jewel Rana
Jewel Rana

Reputation: 2786

make it more dynamic


 for(int i = 0; i < datesData.length; i++){
    Container(
     child: Text(datesDate[i]),
      );
    }

Update You can show with listview.builder

class MyWidget extends StatelessWidget {
  final List data = [
    '09:00 am - 10:00 am',
    '10:00 am - 11:00 am',
    '11:00 am - 12:00 am',
    '12:00 am - 01:00 am',
    '01:00 am - 02:00 am',
    '02:00 am - 03:00 am',
    '03:00 am - 04:00 am',
    '04:00 am - 05:00 am'
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ListView.builder(
          itemCount: data.length,
          itemBuilder: (BuildContext ctxt, int index) {
            return new Text(data[index]);
          }),
    );
  }
}

Upvotes: 3

Balaji Venkatraman
Balaji Venkatraman

Reputation: 1337

You can use toList which makes easier and also use indexOf if you need index

import 'package:flutter/material.dart';

class DateDataWidget extends StatelessWidget {
  final List datesData = [
    '09:00 am - 10:00 am',
    '10:00 am - 11:00 am',
    '11:00 am - 12:00 am',
    '12:00 am - 01:00 am',
    '01:00 am - 02:00 am',
    '02:00 am - 03:00 am',
    '03:00 am - 04:00 am',
    '04:00 am - 05:00 am'
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
          child: Column(
        children: datesData.map((date) {
          int index = datesData.indexOf(date); // use index if you want.
          print(index);
          return Text(date);
        }).toList(),
      )),
    );
  }
}

You can use int index if you need.

Upvotes: 3

Akash Sarode
Akash Sarode

Reputation: 447

try this code on dartpad.dev

import 'package:flutter/material.dart';

void main() {
  runApp(App());
}

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  final List data = [
    '09:00 am - 10:00 am',
    '10:00 am - 11:00 am',
    '11:00 am - 12:00 am',
    '12:00 am - 01:00 am',
    '01:00 am - 02:00 am',
    '02:00 am - 03:00 am',
    '03:00 am - 04:00 am',
    '04:00 am - 05:00 am'
  ];
  
  @override
  Widget build(BuildContext context) {
    return ListView(
      children: data.map((element) => ListTile(title: Text(element))).toList(),
    );
  }
}

Upvotes: 1

Akif
Akif

Reputation: 7640

You need to get the indexed data of the date array. There is an incorrect usage of parentheses. You need to use square brackets to get an index of array. It should look like this:

 for(int i = 0; i < 8; i++){
    Container(
     child: Text(datesDate[i]),
      );
    }

EDIT:

Ok, you can use this widget list inside a column. Now, it will look like this:


  List datesData = [
    
      '09:00 am - 10:00 am',
      '10:00 am - 11:00 am',
      '11:00 am - 12:00 am',
      '12:00 am - 01:00 am',
      '01:00 am - 02:00 am',
      '02:00 am - 03:00 am',
      '03:00 am - 04:00 am',
      '04:00 am - 05:00 am'
    
  ];

  List<Widget> textWidgetList = List<Widget>(); // Here we defined a list of widget!

  @override
  Widget build(BuildContext context) {
    for (int i = 0; i < 8; i++) {
      textWidgetList.add(
        Container(
          child: Text(datesData[i]),
        ),
      );
    }

    return Scaffold(
      body: Container(
        child: Column(
          children: textWidgetList,
        ),
      ),
    );
  }

Upvotes: 3

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