TLDR: Wrap the widget which needs to access to Navigator into a Builder or extract that sub-tree into a class. And use the new BuildContext to access Navigator. This error is unrelated to the destination. It happens because you used a context that doesn’t contain a Navigator instance as parent. How do I create a … Read more
To get the size/position of a widget on screen, you can use GlobalKey to get its BuildContext to then find the RenderBox of that specific widget, which will contain its global position and rendered size. Just one thing to be careful of: That context may not exist if the widget is not rendered. Which can … Read more
The connectivity plugin states in its docs that it only provides information if there is a network connection, but not if the network is connected to the Internet Note that on Android, this does not guarantee connection to Internet. For instance, the app might have wifi access but it might be a VPN or a … Read more
To improve compile-time type safety, package:http 0.13.0 introduced breaking changes that made all functions that previously accepted Uris or Strings now accept only Uris instead. You will need to explicitly use Uri.parse to create Uris from Strings. (package:http formerly called that internally for you.) Old Code Replace With http.get(someString) http.get(Uri.parse(someString)) http.post(someString) http.post(Uri.parse(someString)) (and so on.) … Read more
In your trivial case, it doesn’t matter. In general, you can initialize instance variables in a few ways: Inline (field initializers) class Example1 { T x = value; } Advantages: Direct, concise. Member will be initialized in all constructors. Can be used to initialize final or non-nullable members. Member is initialized before invoking base class … Read more
Don’t downgrade Flutter Problem: This error occurs when you use a bang operator (!) on a nullable instance which wasn’t initialized. For example: String? foo; // Nullable String void main() { var len = foo!.length; // Runtime error: Null check operator used on a null value } Solutions: You need to find out where you’re … Read more
Iterable.forEach, Map.forEach, and Stream.forEach are meant to execute some code on each element of a collection for side effects. They take callbacks that have a void return type. Consequently, those .forEach methods cannot use any values returned by the callbacks, including returned Futures. If you supply a function that returns a Future, that Future will … Read more
Try To below Code Your problem has been solved: Create API Call Function : Future<List<dynamic>> getJobsData() async { String url=”https://hospitality92.com/api/jobsbycategory/All”; var response = await http.get(Uri.parse(url), headers: { ‘Content-Type’: ‘application/json’, ‘Accept’: ‘application/json’, }); return json.decode(response.body)[‘jobs’]; } Write/Create your Widget : Center( child: FutureBuilder<List<dynamic>>( future: getJobsData(), builder: (context, snapshot) { if (snapshot.hasData) { return Padding( padding: const … Read more
You should try below code: Your API Call Function Future<Album> fetchPost() async { String url=”https://jsonplaceholder.typicode.com/albums/1″; var response = await http.get(Uri.parse(url), headers: { ‘Content-Type’: ‘application/json’, ‘Accept’: ‘application/json’, }); if (response.statusCode == 200) { // If the call to the server was successful, parse the JSON return Album.fromJson(json .decode(response.body)); } else { // If that call was … Read more
Dart engineer Erik Ernst says on GitHub: Type promotion is only applicable to local variables. … Promotion of an instance variable is not sound, because it could be overridden by a getter that runs a computation and returns a different object each time it is invoked. Cf. dart-lang/language#1188 for discussions about a mechanism which is … Read more