Flutter

问题 Is there any lib/package that will help in both platform iOS and Android to share image+text+url on FB, Twitter And Insta? I have been searing for 4 hours but didn't find any result. https://pub.dev/packages/flutter_share_me this package is only for android so. If you have any solution for it please guide me. ~ PS : I don't want to use Share package, I have buttons of FB, Insta and Twitter. When user will click on any one of the button then data should be share on any of the social media and

问题 In my app I'm listening for a Firestore query whenever the user signs in. After the app goes in background for some time, the listener gets cancelled and the client doesn't get notified of any new changes. How do I know if a listener has been cancelled by the SDK? What's the proper way of handling this? 回答1: On most operating system this is done automatically by the system itself, in order to preserve battery life. Whether it is possible to detect this situation, and how, depends on the OS.

问题 in my Flutter app I use a SliverAppbar which contains title and an image. When the screen is loaded the first time the image (local from asset folder) is not yet present and hardly appears when it has been loaded. Is there a way either to preload the image or to fade it in when it has been loaded? 回答1: please use precacheImage function reference this https://alex.domenici.net/archive/preload-images-in-a-stateful-widget-on-flutter code snippet Image image1; @override void initState() { //

问题 i am making app in flutter/firebase and i am experiencing the following error on my visual studio code terminal:- Xcode build done. 522.2s 6.26.0 - [Firebase/Core][I-COR000005] No app has been configured yet. 6.26.0 - [Firebase/Messaging][I-FCM001000] FIRMessaging Remote Notifications proxy enabled, will swizzle remote notification receiver handlers. If you'd prefer to manually integrate Firebase Messaging, add "FirebaseAppDelegateProxyEnabled" to your Info.plist, and set it to NO. Follow the

问题 I developing some kind of chat application with PDF viewing functions on Flutter for Android and Linux desktop platforms. So i want to embed PDF viewer in flutter application using some kind of PDF reader or WebBrowser. There is no problems with PDF's on Android - more than 100 plugins on pub.dev for PDF's and WebViews, but none of them supported Linux desktop . I have tried to add Linux desktop support for Android and IOS plugins, but look's like all of them using PlatformView and webview

问题 I'm trying to get hold of Riverpod but I'm having some issues. I created a form for signing in users and I'm trying to get the main view change when the user is logged in. My issue is, when I set change the state and navigate back to the app root, the new state doesn't seem to be available. But if I save a file or hot reload the app, the new state is available. What I'm I doing wrong? My main.dart file import 'dart:developer'; import 'package:flutter/material.dart'; import 'package:hooks

问题 I'm trying to get hold of Riverpod but I'm having some issues. I created a form for signing in users and I'm trying to get the main view change when the user is logged in. My issue is, when I set change the state and navigate back to the app root, the new state doesn't seem to be available. But if I save a file or hot reload the app, the new state is available. What I'm I doing wrong? My main.dart file import 'dart:developer'; import 'package:flutter/material.dart'; import 'package:hooks

问题 I have a problem with installation the Flutter. I set all the parameters, following the official flutter guide, but i have this error: enter image description here I installed Android sdk, this is my configuration: enter image description here enter image description here I also set the flutter environment variable. What's missing? Thank you E. 回答1: Your build tools don't show a version number, and you can update them to v29. To do so, click on the "-" icon, it will turn into a check icon.

问题 I have a problem with installation the Flutter. I set all the parameters, following the official flutter guide, but i have this error: enter image description here I installed Android sdk, this is my configuration: enter image description here enter image description here I also set the flutter environment variable. What's missing? Thank you E. 回答1: Your build tools don't show a version number, and you can update them to v29. To do so, click on the "-" icon, it will turn into a check icon.

问题 I am learning Flutter and trying to build a mobile application that can display my today courses. And I want to learn more about data handling so I try to use php and get data from database. My target is that I want to post the date value to the php file, then execute the sql query and get the data in json format. Finally, the data will be displayed in a Flutter app. A part of my php file is as follow: $date = $_POST["date"]; $sql = "SELECT * FROM Table WHERE Date = '$date'"; $response=array(