dart

问题 According to Flutter's issue here , The Auto-Scroll to Index where each cell/item has dynamic height is currently not supported. I have tried another solution but no works. so, What's a temporary solution to make ListView with AutoScroll for dynamic height? Any Idea? 回答1: Your question so, What's a temporary solution to make ListView with AutoScroll for dynamic height? Screen Record solution scroll-to-index package This package provides the scroll to index mechanism for fixed/variable row

问题 According to Flutter's issue here , The Auto-Scroll to Index where each cell/item has dynamic height is currently not supported. I have tried another solution but no works. so, What's a temporary solution to make ListView with AutoScroll for dynamic height? Any Idea? 回答1: Your question so, What's a temporary solution to make ListView with AutoScroll for dynamic height? Screen Record solution scroll-to-index package This package provides the scroll to index mechanism for fixed/variable row

问题 According to Flutter's issue here , The Auto-Scroll to Index where each cell/item has dynamic height is currently not supported. I have tried another solution but no works. so, What's a temporary solution to make ListView with AutoScroll for dynamic height? Any Idea? 回答1: Your question so, What's a temporary solution to make ListView with AutoScroll for dynamic height? Screen Record solution scroll-to-index package This package provides the scroll to index mechanism for fixed/variable row

问题 I am trying to sort list of DateTime time elements in ascending order.I have realized normal operators like > or < don't cut it. What is the best way to compare two DateTime variables ? 回答1: Simply use the methods isAfter() , isBefore() or isAtSameMomentAs() from DateTime . Other alternative, use compareTo(DateTime other) , as in the docs: Compares this DateTime object to [other], returning zero if the values are equal. Returns a negative value if this DateTime [isBefore] [other]. It returns

问题 I need to create an app that navigates a user to after a period of inactivity. I tried wrapping my app in GestureDetector and run a timer after a specified period as shown below but it is not working: class _MyAppState extends State<MyApp> { Timer _timer; @override void initState() { super.initState(); _initializeTimer(); } void _initializeTimer() { _timer = Timer.periodic(const Duration(seconds: 20), (_) => _logOutUser); } void _logOutUser() { Navigator.push( context, MaterialPageRoute(

问题 I need to create an app that navigates a user to after a period of inactivity. I tried wrapping my app in GestureDetector and run a timer after a specified period as shown below but it is not working: class _MyAppState extends State<MyApp> { Timer _timer; @override void initState() { super.initState(); _initializeTimer(); } void _initializeTimer() { _timer = Timer.periodic(const Duration(seconds: 20), (_) => _logOutUser); } void _logOutUser() { Navigator.push( context, MaterialPageRoute(

问题 I need to create an app that navigates a user to after a period of inactivity. I tried wrapping my app in GestureDetector and run a timer after a specified period as shown below but it is not working: class _MyAppState extends State<MyApp> { Timer _timer; @override void initState() { super.initState(); _initializeTimer(); } void _initializeTimer() { _timer = Timer.periodic(const Duration(seconds: 20), (_) => _logOutUser); } void _logOutUser() { Navigator.push( context, MaterialPageRoute(

问题 I have a binary data stored in Uint8List and I'd like to read a 16-bit int from that list. Are there any convenience methods to help with this? (paraphrasing from a conversation I had with a colleague) 回答1: You can use the ByteData class: var buffer = new Uint8List(8).buffer; var bytes = new ByteData.view(buffer); bytes.getUint16(offset); (paraphrased from an answer provided by a colleague) 回答2: As Seth said, you want a ByteData view of the Uint8List binary data. It is slightly better to use

问题 I have a binary data stored in Uint8List and I'd like to read a 16-bit int from that list. Are there any convenience methods to help with this? (paraphrasing from a conversation I had with a colleague) 回答1: You can use the ByteData class: var buffer = new Uint8List(8).buffer; var bytes = new ByteData.view(buffer); bytes.getUint16(offset); (paraphrased from an answer provided by a colleague) 回答2: As Seth said, you want a ByteData view of the Uint8List binary data. It is slightly better to use

问题 What is the method .reload() from the FirebaseUser used for? Locally the function doesn't change any data, and with Firestore.instance.currentUser() i would always get the current data, wouldn't I? From the docs: public Task reload () Manually refreshes the data of the current user (for example, attached providers, display name, and so on). So I originally thought after calling user.reload() the output would be: "name of user: bar" and not "name of user: foo". So for me it seems like it doesn