dart

问题 I'm trying to use Google Oboe for a 3D audio processing app due to it's low latency. The app will have a C++ backend, which does the processing, and the frontend is done with Flutter. I'm running a couple of tests to see if it'll work but I'm having issues loading assets from Flutter to Oboe. I checked the example RhythmGame in Oboe's repo, done with Java, but couldn't quiet find a way of doing that straight from Dart to C++. The connection between front and backend is through dart::ffi Here

问题 I have a settings menu with 8 listTiles and If I turn on one of the switches, the issue is - when I click on the back button and click on the settings menu again, the switch is turned off ... what would I have to add to make sure the switch is on even if the back button is clicked? After this- what ever switch is turned on that's the color image I want to display in another class ..... that is why I need to ensure only one switch is on at one time, and that once the user clicks the back

问题 Hi i got stuck while write flutter code on dropdown button, where after user choosed from the list the hint wont changed to what the user choose. Can anyone help ? So here is my code: DropdownButton(items: [ DropdownMenuItem(value: "1", child: Text('+')), DropdownMenuItem(value: "2", child: Text('-')), DropdownMenuItem(value: "3", child: Text('X')), DropdownMenuItem(value: "4", child: Text('/')) ].toList(), onChanged: (value){ setState(() { _value = value; }); },hint: Text('Operation'),) 回答1:

问题 I have a document with the following structure: { "email" : "a@gmail.com", "value" : 100, "children" : [ { "email" : "b@gmail.com", "value" : 100 }, { "email" : "b@gmail.com", "value" : 200 } ] } I want to remove all elements with the email b@gmail.com from the children array. I am able to remove one item if I pass the whole object to be removed like this: FieldValue.arrayRemove(childObject) But I want both the objects with the email b@gmail.com to be removed. Is there anyway to achieve this

问题 Using Flutter, I would like to get device information details such as CPU count, bitness, Total Memory, Total device storage, etc. Similar to apps one can get on the App stores. I looked at device_info package, but that does not cover it. I also looked at system_info (which is pretty good, seems abandoned), but only works on Android since it's using Linux shell commands to get the info. I would also like it to work for iOS. Any ideas? 回答1: Add this package to your pubspec.yaml: system_info:

问题 Using Flutter, I would like to get device information details such as CPU count, bitness, Total Memory, Total device storage, etc. Similar to apps one can get on the App stores. I looked at device_info package, but that does not cover it. I also looked at system_info (which is pretty good, seems abandoned), but only works on Android since it's using Linux shell commands to get the info. I would also like it to work for iOS. Any ideas? 回答1: Add this package to your pubspec.yaml: system_info:

问题 Using Flutter, I would like to get device information details such as CPU count, bitness, Total Memory, Total device storage, etc. Similar to apps one can get on the App stores. I looked at device_info package, but that does not cover it. I also looked at system_info (which is pretty good, seems abandoned), but only works on Android since it's using Linux shell commands to get the info. I would also like it to work for iOS. Any ideas? 回答1: Add this package to your pubspec.yaml: system_info:

问题 I've been working on a flutter project using VS Code. And when I opened my project today, there is a notification stating "Initializing flutter. This may take a few minutes", and it's struck there. Also, all the commands such as "flutter run" and "flutter doctor" are perfectly running and I am able to run my app through the terminal. But the other options such as Run Without Debugging are not working, and also the code auto-complete is showing no suggestions. Can anyone please help me in

问题 I need to implement scrolling bars in form. This is for web users by clicking on scrolling bar, they can navigate. Scrollbar class in flutter works for touch device, but not with mouse based input. I've tried using "draggable_scrollbar" library from pub.dev, however it only accepts ListView as child. My code: Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('My form'), ), body: Padding( padding: const EdgeInsets.all(16.0), child: Scrollbar( child:

问题 I need to implement scrolling bars in form. This is for web users by clicking on scrolling bar, they can navigate. Scrollbar class in flutter works for touch device, but not with mouse based input. I've tried using "draggable_scrollbar" library from pub.dev, however it only accepts ListView as child. My code: Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('My form'), ), body: Padding( padding: const EdgeInsets.all(16.0), child: Scrollbar( child: