'Non-nullable instance field 'Welcome' must be initialized Flutter

I am trying to call API's in flutter but when I am defining the variable _Welcome I am getting this error. Does anyone know how to fix it?

class _PostsPageState extends State<PostsPage> {
Future<Welcome> _Welcome; //error here


@override
void initState() {
_Welcome = API_Manager().getNews();
super.initState();
}

flutter dart

Solution 1:^[1]

This error due to the null-safety property of flutter. So, what is null-safety? Flutter null safety is the feature that became available after the release of version 2. This feature helps to improve developers' productivity by eliminating a whole class of bugs caused by null dereferencing errors. So, how can you solve this problem? Actually, there are many options for that; you can initialize the variable at the time of the declaration, or you can use late keyword such as late Future<Welcome> _Welcome;

Solution 2:^[2]

try late Future<Welcome> _Welcome;

With this you promise to the compiler that it is initialized when it's accessed later on. Since you assing it directly in the initState that is fine.

Solution 3:^[3]

Use late Future<Welcome> _welcome;

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Ogün Birinci
Solution 2	Robiness
Solution 3	Aravind Aji

'Non-nullable instance field 'Welcome' must be initialized Flutter

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]

Solution 3:^[3]