dart-2 Questions
8
Solved
For some reason, I cannot focus on a TextField after on the next page after navigating. The keyboard would automatically dismiss when the TextField is selected. If I set autofocus: true on the Text...
12
I was trying to install dart2 recently, but when I try to install pub global activate stagehand, it comes with a warning.
Warning: Pub installs executables into $HOME/.pub-cache/bin, which is n...
Catboat asked 13/10, 2018 at 15:0
9
Solved
In my app I am creating signup page where I need to add DOB. I want to add date picker in that but I am not getting correct way to do this.
Doorknob asked 9/10, 2018 at 18:49
8
I just updated to Dart2 and Flutter sdk: '>=2.12.0 <3.0.0' and now this if statement breaks:
decoration: new BoxDecoration(
shape: BoxShape.circle,
color: Colors.blueAccent,
border: Borde...
Maplemaples asked 10/3, 2021 at 8:42
3
In my Flutter mobile app while loading profile image of users through NetworkImage(), I am getting 403 status code in response.
How can I handle this by displaying an Image from my assets folder i...
2
Solved
List foo -> List bar
I can use three method
1.List<MyClass> bar = foo.cast<MyClass>()
2.List<MyClass> bar = List.castFrom(foo)
3.List<MyClass> bar = List.from(foo)
What i...
4
My flutter app is using firebase as a backend but I need to store media files (photos & videos) in my s3 bucket. The mission is to upload the media retrieved from the image picker into s3 &...
Prochoras asked 17/12, 2018 at 8:39
2
Solved
For an app, I need a 64bit unsigned int. Looking at dart documentation I did not see how to exactly go about declaring one.
Can anyone tell me how this is done? I will use this "64bit unsigned int...
3
I have been working with the online gallery of Flutter charts (https://google.github.io/charts/flutter/gallery.html) but I'm struggling to add a title for x & y axis values.
Can somebody help ...
2
Solved
I have initially empty list of Widget in Column. Now on Other widget click I am adding new Custom Widget in _contactItems
Column(
children: _contactItems,
)
List<Widget> _contactItems ...
Cly asked 22/1, 2019 at 14:38
5
Solved
I am getting exception when I trying to navigate from one view to another in flutter app.
I/flutter ( 2199): ══╡ EXCEPTION CAUGHT BY GESTURE ╞═════════════════════════════════════════════════════...
Fuse asked 19/9, 2018 at 12:7
2
Solved
I'm trying to define a callback function that needs to accept a generic parameter and return a value of the same type. Keep in mind that the following example is an oversimplified version of what I...
Drumfish asked 25/4, 2019 at 11:17
0
main() async {
print('Hello World');
await getAsyncString().then((hello) => print(hello));
}
Future<String> getAsyncString() async {
return 'Hello Async World';
}
This is my code exa...
Trojan asked 5/4, 2019 at 21:45
1
Solved
Dart has some null-aware operators, i.e. it is possible to do
var obj;
obj?.foo(); // foo is only called if obj != null.
Is this also possible for functions that are stored or passed to va...
2
Solved
In Dart Object() constructor is declared as const so:
identical(const Object(), const Object()); //true
I know that in Dart 2 the keyword const is optional and I thought that the previous statem...
2
Solved
I'm trying isolates and I'm wondering how could I spawn some of them doing heavy computations that, when the root Isolate ask them for their current computing value they respond it, "on demand".
A...
Chapin asked 10/9, 2018 at 14:20
1
Solved
I am using banklist in stateful widget. passing list to pageState using List<Bank> bankLists = this.widget.bankLists;
Que 1. Why I am getting error at gradientcolor: gradientBankCard("FFB74...
1
Solved
I have a generic static method that looks like this:
static build<K>() {
return (GenericClass<K> param) => MyClass<K>(param);
}
So far I have tried:
typedef F = MyClass<...
1
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