Flutter

问题 I want to replace the login to the app from username and password to fingerprint in flutter, so the user when have successful fingerprint he will see his information in the application (this information send from server). How I can manage that I want some thing to make this fingerprint connected with this user to get correct data from server ?. I use local_auth for fingerprint authentication but I have no idea to tell server this fingerprint is associated for this user. I read some thing like

问题 I'm from Android development and very new to Flutter development, I have come across ScopedModel and Provider for State Management and I picked Provider for my use case. And my use case is after logging in, dashboard should be rendered with data. I have created a ViewModel that is extending ChangeNotifier, and wanted to use so that I can reuse this data across different widgets. Im not completely sure how to use my ViewModel to load data onload of the widget. Can some help me with a proper

问题 I would like to know if there's any way(implementation, package) I could use to make a specific part of a dynamically received String, CLICKABLE. For example, let's take a look at this json file. I would like to know if after I display this user in a list builder which contains all the users, can I have some kind of a clickable flatbutton on that highlighted "client-server" word, so that when I press it, I can navigate let's say to a separate dictionary page, and search for that word

问题 Launching lib/main.dart on sdk gphone x86 arm in debug mode... Running Gradle task 'assembleDebug'... ✓ Built build/app/outputs/flutter-apk/app-debug.apk. Installing build/app/outputs/flutter-apk/app.apk... E/AndroidRuntime(11877): FATAL EXCEPTION: main E/AndroidRuntime(11877): Process: com.example.truthfxac, PID: 11877 E/AndroidRuntime(11877): java.lang.RuntimeException: Unable to get provider com.google.android.gms.ads.MobileAdsInitProvider: java.lang.IllegalStateException: E/AndroidRuntime

问题 I searched a lot but couldn't find a solution. I need your help. In my database model, I have a method like this to get the data: Future<Map<String,dynamic>> getSystemSettings() async { var response = await _firestore.collection("system").doc("settings").get(); return response.data(); } Later, I want to use the data in the form of Map <String, dynamic> from the class I want to get the data from by calling the method as follows. getValues() { database.getSystemSettings().then((value) { print(

问题 I'm new to flutter and this is probably a simple question but i'm looking for a bit of an explanation to help me understand futures and future builder more. I am trying to query firebase (depending on what a user clicks on a previous screen) and i'd like to wait for all the data to be loaded before anything is shown. To do this I thought a future builder would be most appropriate as i'm going to be showing some products that won't change a great deal. I created my getData function: Future

问题 I am using rest API in my flutter app. For further request I need JSESSIONID which I received from my profile API. I successful got response but I need guide to iterate cookie value. I followed following steps: final response = await http.get( strURL, headers: { "Authorization": basicAuth, "Content-Type": "application/json" }, ); String rawCookie = response.headers['set-cookie']; print('rawCookie $rawCookie'); As print raw cookie it is printing details: flutter: rawCookie __cfduid

问题 Below is the code. Navigation to Login page, from Home page ElevatedButton( onPressed: () => Navigator.of(context, rootNavigator: true) .push(MaterialPageRoute( fullscreenDialog: true, builder: (context) => UserLoginPage(), )), child: Text('Login to continue'), ), Inside Login page: BlocConsumer<UserAuthCubit, UserAuthState>( listener: (context, state) { if (state is UserAuthorized) { Navigator.of(context, rootNavigator: true).pop(); } if (state is UserAuthWaiting) { showModalBottomSheet(

问题 I'm trying to change the active page index via a pagecontroller in Flutter, using the Bloc pattern and its throwing "'_positions.isNotEmpty': ScrollController not attached to any scroll views.". This is my code: WelcomeWizardScreen: import 'package:flutter/widgets.dart'; import 'package:flutter_bloc/flutter_bloc.dart'; import 'package:fluttertest/blocs/wizard/bloc/bloc.dart'; import 'package:fluttertest/screens/wizardsteps/joincongregation.dart'; import 'package:fluttertest/screens

问题 I have a azure media services url like so: https://amssamples.streaming.mediaservices.windows.net/3b970ae0-39d5-44bd-b3a3-3136143d6435/AzureMediaServicesPromo.ism/manifest But when I try and play this on android I get the following error (also happens with dash url): com.google.android.exoplayer2.source.UnrecognizedInputFormatException: None of the available extractors (MatroskaExtractor, FragmentedMp4Extractor, Mp4Extractor, Mp3Extractor, AdtsExtractor, Ac3Extractor, TsExtractor,