Welcome to Jonic Developer Community for programmer and developer-Open, Learning and Share
Login
Remember
Register
Ask
Q&A
All Activity
Hot!
Unanswered
Tags
Categories
Users
Ask a Question
Ask a Question
Categories
All categories
Topic[话题] (13)
Life[生活] (4)
Technique[技术] (2.1m)
Idea[创意] (3)
Jobs[工作] (2)
Others[杂七杂八] (18)
Code Example[编程示例] (0)
Recent questions tagged dart
0
votes
996
views
1
answer
dart - Detect vertical swipe direction in Flutter
How to detect when the user swipe vertically either upward on downward? I have been using swipedetector package, but now, it gives me exceptions like The getter 'globalPosition' was called on null. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
820
views
1
answer
dart - How do I access metadata annotations from a class?
I have a Dart class that is annotated with metadata: class Awesome { final String msg; const Awesome(this.msg); String toString() => msg; } @Awesome('it works! ... and if so, with what. How do I do that? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
790
views
1
answer
dart - Dartlang with polymer character encoding
I wrote a snippet and not working with national characters. The "A t?rzsszám"... text appear "t??rzssz??m" with my loginstatus field. Main html: <!DOCTYPE html> ... ?l áll!'; } else { What can I do... See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
1.0k
views
1
answer
dart - js interop compiled with dart2js error - Uncaught NoSuchMethodError : method not found:
I generated a sample Polymer web project. Added following js file. jslib.js function testfunction() { alert("test"); } in clickcounter.dart I added ... /out/web/testrun.html_bootstrap.dart.js:12963:17) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
636
views
1
answer
dart - How to parse JSON only once in Flutter
I am making an app which takes values through JSON parsing. My app has multiple tabs but each time im swiping between tabs, the JSON sends a new ... Fourth.dart? Any assistance is very much appreciated. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
633
views
1
answer
dart - How to programmatically clear PaperInput and have the floating label drop down to the input line
I have the following markup: <paper-input id="alias-input" floatingLabel label="Person Alias (eg: King, Eldest Son, Mooch, etc.)"></paper-input> < ... do that. Is there some other call to achieve this? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
1.4k
views
1
answer
dart - Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null)
Before mark it as duplicate please read the question. I have set both SHA1 and SHA256 in my google console. I have tried many way but still facing error. ... and other so many. Where I'm still missing ? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
668
views
1
answer
dart - Custom width/height property for a widget are ignored
Sometimes I want to force a widget to take a specific size, which I usually do by using a SizedBox/ConstrainedBox/Container But I've realized that ... is that? Example: Expected behavior: Actual behavior: See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
1.5k
views
1
answer
dart - Flutter populate dropdown button from json array
How do I populate this JSON list into dropdown button? { "status": true, "message": "success", "data": { "list": [ { "idattribute": "2", "attrName": " ... ": "1", "attrName": "FRUIT JUICE" } ] } } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
521
views
1
answer
dart - How do I pass multiple entry_points to polymer transformer in pubspec.yaml?
Now that pub build supports building Polymer apps, how do I pass multiple entry_points to the Polymer transformer in my pubspec.yaml file? When I try ... : web/index.html entry_points: web/reports.html See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
875
views
1
answer
dart - Flutter: Is it possible to click through a PageView?
Trying to make widgets behind a PageView clickable by wrapping it around a GestureDetector but it doesn't work. Is there another way I can do ... _pageController, children: _buildForegroundPages(), ), ), See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
1.5k
views
1
answer
dart - Format time labels in charts_flutter time series chart
I have implemented a time series chart in my flutter app which displays energy data over time: final List<charts.Series<TimeSeriesEnergy, DateTime>> seriesList ... do this. Any suggestions are welcome :) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
906
views
1
answer
dart - Flutter: Test that a specific exception is thrown
in short, throwsA(anything) does not suffice for me while unit testing in dart. How to I test for a specific error message or type? Here is ... () => operations.lookupOrderDetails(), throwsA(MyCustErr)); See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
788
views
1
answer
dart - Keep the bottom navigation bar in every screens flutter
I have this bottom navigation bar with center docked floating icon,the bottom bar is present and i can go through the tab elements in bottombar but i need to show the ... ) => new LoginScreen(), }, ); } } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
879
views
1
answer
dart - Dartium displays blank page
my Dartium web browser suddenly stopped displaying the content of Polymer application. Even the basic dart-polymer template project (that reversing of text) is ... etc. Hopeless... Thanks for ideas Rene See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
663
views
1
answer
dart - Unwanted space appearing between RaisedButton widgets in a column
tl;dr Why is space appearing between my two buttons when I have not explicitly set any? I am trying to make a layout like the one below: However, what ... ), ), child: Builder(builder: super.build)); } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
778
views
1
answer
dart - flutter return future list in a var to use outside the loop
Hello I'm trying to recuperate the list value of a database. i can but what i want is to export the result in a var so i can use in all my code just by ... '] as String, ); } } can i have help please ? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
739
views
1
answer
dart - how to display images and text on it in listview flutter?
i want to display a images and text in listview. Data is parsed and set it in model class. can you please help me out. Below is my class. import ' ... , webstiteURL: json['website_url'] as String, ); } } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
739
views
1
answer
dart - How to design a Text Widget that wraps automatically in flutter?
I want to design a text widget that wraps automatically, and it uses an ellipsis when the text length exceeds the maximum. The following code can achieve a ... size of parent. How can I improve the code? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
1.5k
views
1
answer
dart - Clear state in Flutter when using Provider
How can I clear the current state of my providers manually in my Flutter app? The use case I have is when a user signs out of my app then ... it is cleared automatically when the app is restarted however. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
862
views
1
answer
dart - Flutter firebase validation of form field inputs
I'm new to Flutter and Firebase and I am trying to validate user input from a form and run it up against a the firebase collection. I ask users ... call (ideally, without having to build another widget)? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
769
views
1
answer
dart - How do I convert an image to base64 and base64 to image? The way I do it doesn't work
This is an example code. var image = await ImagePicker.pickImage(source: ImageSource.camera); var stringBytes = base64.encode(image.readAsBytesSync()); var bytes = ... I am going to add it in a database. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
638
views
1
answer
dart - Can I put ng-if directive on an element which also binds to a controller
I was wondering in case I have a controller and ng-if directive on the same element as in <div foo ng-if= ctrl.visible >You can see me</div> and a ... Should I see the text You can see me" or not? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
936
views
1
answer
dart - Making Private Route in Flutter
How can I make a wrapper over my private routes, which navigate to screen only when user is authorized, otherwise redirect to login and get back to ... just reuse it on my other Private future screens? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
1.6k
views
1
answer
dart - Flutter failed for task app:mergeDebugNativeLibs and app:mergeDebugJavaResource
FAILURE: Build completed with 2 failures. 1: Task failed with an exception. What went wrong: Execution failed for task ':app:mergeDebugNativeLibs'. A ... Gradle task assembleDebug failed with exit code 1 See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
985
views
1
answer
dart - Flutter: Change status bar color in iOS
I want to change status bar color with package:flutter/services.dart package but it doesn't work. I am using Mac and iOS simulator: Mojave 10.14.6 iOS 12.2 ... ? U.P.D. This issue starts to drive my nuts. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
1.4k
views
1
answer
dart - How to post x-www-form-urlencoded in Flutter
I am trying to send a POST request to an API to create an account. The request is working well, it should look like this : Bulk Edit Mode : Key-Value ... on /app/createUser... ('/app/' is in BASE_URL) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
0
votes
840
views
1
answer
dart - Matching Unicode letters with RegExp
I am in need of matching Unicode letters, similarly to PCRE's p{L}. Now, since Dart's RegExp class is based on ECMAScript's, it doesn't have the ... φ or ?, they should match if they are actual letters. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
dart
Page:
1
2
3
4
5
6
...
31
next »
Ask a question:
Welcome to Jonic Developer Community for programmer and developer-Open, Learning and Share
Just Browsing Browsing
[1] LayUI水平导航菜单如何添加三级菜单?
[2] html - How to create even cell spacing within a
[3] reactjs - Embedded maps in react
[4] angular - Is ngx-pagination efficient with firestore collection?
[5] 数组对像合并,用新的内容覆盖老的怎么解决
[6] iview Table 第一个的单选怎么去实现表单验证并且在表头单选列加上*号?
[7] autodesk forge怎么修改第一人称视角位置。
[8] 关于echarts同页面多个图表出现的问题
[9] React Ant Design文件上传,获取文件真实路径
[10] google cloud platform - GCP Startup script is not executed
548k
questions
547k
answers
4
comments
48.7k
users
Most popular tags
javascript
python
c#
java
How
android
c++
php
ios
html
sql
r
c
node.js
.net
iphone
asp.net
css
reactjs
jquery
ruby
What
Android
objective
mysql
linux
Is
git
Python
windows
Why
regex
angular
swift
amazon
excel
google
algorithm
macos
Java
visual
how
bash
Can
multithreading
PHP
Using
scala
angularjs
typescript
apache
spring
performance
postgresql
database
flutter
json
rust
arrays
C#
dart
vba
django
wpf
xml
vue.js
In
go
Get
jQuery
xcode
jsf
http
Google
mongodb
string
shell
oop
powershell
SQL
C++
security
assembly
docker
Javascript
Android:
Does
haskell
web
Convert
azure
debugging
delphi
vb.net
Spring
datetime
pandas
oracle
math
联盟问答网站-Union QA website
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
在这了问答社区
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
...