The docs mean that the extension classes themselves can have static fields and helper methods. These won’t be extensions on the extended class. That is, in your example, Foo.foo() is legal but String.foo() is not. You currently cannot create extension methods that are static. See https://github.com/dart-lang/language/issues/723. Note that you also might see Dart extension methods … Read more
this works since a short while: transformers: # or dev_transformers – $dart2js: environment: { PROD: “true” } access it from the code like String.fromEnvironment() main() { print(‘PROD: ${const String.fromEnvironment(‘PROD’)}’); // works in the browser // prints ‘PROD: null’ in Dartium // prints ‘PROD: true’ in Chrome } see also Configuring the Built-in dart2js Transformer How … Read more
This is a recent change related in the Notes From the June 4 Dart Language Design Meeting : const instance variables Gilad’s view is that they should work like statics except for scoping. Apparently, though, it’s complicating the VM implementation of instance metadata. Three solutions: No const instance fields. Metadata is statically scoped. Try to … Read more
You can use my plugin flutter_inappwebview, which is a Flutter plugin that allows you to add inline WebViews or open an in-app browser window and has a lot of events, methods, and options to control WebViews. To be able to recognize downloadable files, you need to set the useOnDownloadStart: true option, and then you can … Read more
To catch exceptions thrown in a flutter test, use WidgetTester.takeException. This returns the last exception caught by the framework. await tester.tap(find.byIcon(Icons.send)); expect(tester.takeException(), isInstanceOf<UnrecognizedTermException>()); You also don’t need a throwsA matcher, since it is not being thrown from the method.
First, obtain a RenderBox. Then just call hitTest method. Any will do, as long as it’s mounted in the tree. To do so you’ll have to use BuildContext through context.findRenderObject(). BuildContext context; final renderObj = context.findRenderObject(); if (renderObj is RenderBox) { final hitTestResult = HitTestResult(); if (renderObj.hitTest(hitTestResult, position: /* The offset where you want to … Read more
codeUnits gets you a List<int> Uint8List.fromList(…) converts List<int> to Uint8List String.fromCharCodes(…) converts List<int> or Uint8List to String List<int> list=”xxx”.codeUnits; Uint8List bytes = Uint8List.fromList(list); String string = String.fromCharCodes(bytes);
With the help @aziza answer i write detail code snippet of search view with list filter below. it will help for others import ‘package:flutter/material.dart’; class SearchList extends StatefulWidget { SearchList({ Key key }) : super(key: key); @override _SearchListState createState() => new _SearchListState(); } class _SearchListState extends State<SearchList> { Widget appBarTitle = new Text(“Search Sample”, style: … Read more
As pointed in the official Dart language article Method Cascades in Dart: The “..” syntax invokes a method (or setter or getter) but discards the result, and returns the original receiver instead. In brief, method cascades provide a syntactic sugar for situations where the receiver of a method invocation might otherwise have to be repeated. … Read more