Empty List of String appears null when initialized

Question

I am trying to insert a string into my list of strings.

I initialize my string like so in a class called globals that holds this list.

List<String> myStringList = [];

Then in my controller class I am trying to insert a string into the list like so.

globals.myStringList.add(stringToAdd);

But I get an error that says the list is null. Not sure if I am initializing it wrong since it appears this is the way to initialize an empty list.

Globals Class

import 'package:flutter_project/models/categories.dart';
import 'package:flutter_project/models/videos.dart';
List<String> reports = [];
List<Video> videos = [];
List<Category> categories = [];
List<String> userSearches = <String>[];
bool inSearch = false;

You have initialized it right but the matter is where you have initialized.Can you show the full code of that globals class — Guru Prasad mohapatra
– Guru Prasad mohapatra, Commented May 17, 2020 at 12:28
The globals class just holds some variables that I need to reference throughout the program. — poomulus
– poomulus, Commented May 17, 2020 at 14:29

poomulus · Accepted Answer · 2020-05-17 12:05:25Z

3

Found the answer, I was initializing my string incorrectly. It has to be done like so.

List<String> myStringList = <String>[];

answered May 17, 2020 at 12:05

poomulus

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4 Comments

Jitesh Mohite Over a year ago

This is the right way List<String> myStringList = [];-- How you found error here?

poomulus Over a year ago

Yeah thought it was fixed but it turns out it's still throwing the error that it is null when I reference it for the first time.

poomulus Over a year ago

Okay I think I have the answer, because the globals class isn't really initialized due to it just holding variables it's never really set equal to nothing. So I just run a check to see if it's null and if it is then I set it to empty and it appears to be working.

John Over a year ago

@poomulus thanks bro, for your question and answer.

Guru Prasad mohapatra · Accepted Answer · 2020-05-17 17:37:56Z

-1

Make the variable static so that it can be accessible by the class name

answered May 17, 2020 at 17:37

Guru Prasad mohapatra

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