dart

问题 I tested this flutter app example: https://github.com/tensor-programming/flutter_read_write_file_and_path But, browsing my device with a file-manager (Solid Explorer), I cannot find the file "db.txt" created by this example. final path = await localPath; I checked in many folders including: /storage/emulated/0 (= sdcard) sdcard/Android/data sdcard/data Where is this file? Should I root my device to find/see it? What string to add after the "path" variable to reach the Download folder? Or, how

问题 I came across a websocket example that I would like to use. However it uses import 'dart:html'; . When I introduce that in my Flutter project seems like its not being picked up. Do I need to add additional dependencies to the pubspec.yaml ? 回答1: dart:html can't be used in Flutter. It is for browser applications only. dart:html also only comes with the regular Dart SDK, not with the Dart SDK shipped with Flutter. 回答2: I know this is an old question but let me drop this answer here. I've

问题 I came across a websocket example that I would like to use. However it uses import 'dart:html'; . When I introduce that in my Flutter project seems like its not being picked up. Do I need to add additional dependencies to the pubspec.yaml ? 回答1: dart:html can't be used in Flutter. It is for browser applications only. dart:html also only comes with the regular Dart SDK, not with the Dart SDK shipped with Flutter. 回答2: I know this is an old question but let me drop this answer here. I've

问题 I came across a websocket example that I would like to use. However it uses import 'dart:html'; . When I introduce that in my Flutter project seems like its not being picked up. Do I need to add additional dependencies to the pubspec.yaml ? 回答1: dart:html can't be used in Flutter. It is for browser applications only. dart:html also only comes with the regular Dart SDK, not with the Dart SDK shipped with Flutter. 回答2: I know this is an old question but let me drop this answer here. I've

问题 I came across a websocket example that I would like to use. However it uses import 'dart:html'; . When I introduce that in my Flutter project seems like its not being picked up. Do I need to add additional dependencies to the pubspec.yaml ? 回答1: dart:html can't be used in Flutter. It is for browser applications only. dart:html also only comes with the regular Dart SDK, not with the Dart SDK shipped with Flutter. 回答2: I know this is an old question but let me drop this answer here. I've

问题 In a Flutter project, how to get the (absolute) path to the Download folder in my Android device? My Download folder is next those one: Alarms, Android, data, DCIM, Documents, Movies, Music, Notifications, Pictures, ... Device: GALAXY S8+ SM-G955F. Android 8.0. Not Rooted. Flutter beta v0.5.1. Dart 2.0.0-dev.58.0. Windows 10 File manager showing my Download folder Using this package path_provider I got those 3 paths: /data/user/0/com.exemple.fonzo/cache /data/user/0/com.exemple.fonzo/app

问题 Is there an easy way in Flutter to 'linkify' a text that might contain a mix of plain text, emails and web URLs? E.g. if my text is My phone number is 099 123 45 67 and my email is test@test.com the phone number and the email would be rendered as clickable links. In Android it would be a one liner: textView.setAutoLinkMask(Linkify.ALL); I've seen that a similar question has been asked here. That solution would work fine for static texts, but for dynamic texts it would be a lot more

问题 Is there an easy way in Flutter to 'linkify' a text that might contain a mix of plain text, emails and web URLs? E.g. if my text is My phone number is 099 123 45 67 and my email is test@test.com the phone number and the email would be rendered as clickable links. In Android it would be a one liner: textView.setAutoLinkMask(Linkify.ALL); I've seen that a similar question has been asked here. That solution would work fine for static texts, but for dynamic texts it would be a lot more

问题 Why are we using dispose() method? I'm little confused about it. what will be issue occurs If we don't use it and what's the benefit of using it? @override void dispose() { // TODO: implement dispose super.dispose(); } 回答1: dispose method use to release the memory allocated to variables when state object is removed. For example, if you are using a stream in your application then you have to release memory allocated to streamController. Otherwise your app may get warning from playstore and

问题 How can I create easily a range of consecutive integers in dart? For example: // throws a syntax error :) var list = [1..10]; 回答1: You can use the List.generate constructor : var list = new List<int>.generate(10, (i) => i + 1); You can alternativelly use a generator: /// the list of positive integers starting from 0 Iterable<int> get positiveIntegers sync* { int i = 0; while (true) yield i++; } void main() { var list = positiveIntegers .skip(1) // don't use 0 .take(10) // take 10 numbers