flutter-dependencies

问题 I'm trying to use a webview in flutter as my home page for my application. Everything loads just fine, however hitting the back button doesn't send me to the previous web page in the webview, it just exits the application. import 'package:flutter/material.dart'; import 'package:webview_flutter/webview_flutter.dart'; import 'package:url_launcher/url_launcher.dart'; class _StudentPortalState extends State<StudentPortal>{ _launchURL(url) async { if (await canLaunch(url)) { await launch(url); }

问题 I'm trying to use a webview in flutter as my home page for my application. Everything loads just fine, however hitting the back button doesn't send me to the previous web page in the webview, it just exits the application. import 'package:flutter/material.dart'; import 'package:webview_flutter/webview_flutter.dart'; import 'package:url_launcher/url_launcher.dart'; class _StudentPortalState extends State<StudentPortal>{ _launchURL(url) async { if (await canLaunch(url)) { await launch(url); }

问题 After initialising the the workmanager and creating either of the tasks, If we use any plugins inside of the task execution it isn't recognised and throw an error as bellow MissingPluginException(No implementation found for method getLocation on channel lyokone/location) Actual code : Workmanager.executeTask((task, inputData) async { Location locationObject = Location(); locationObject.getLocation(); print(locationObject); return Future.value(true); } Basically any other plugin used inside of

问题 I have the following function in dart to set a particular boolean preference value. _switchPersistentNotifications() { setState(() { isPersistentNotificationEnabled = !isPersistentNotificationEnabled; }); widget.preferences.setBool( "isPersistentNotificationEnabled", isPersistentNotificationEnabled); } This function sets the value of isPersistentNotificationEnabled preference. Now on the native android end, I am supposed to use this shared preference value. Here's what I have done so far.

问题 I have the following function in dart to set a particular boolean preference value. _switchPersistentNotifications() { setState(() { isPersistentNotificationEnabled = !isPersistentNotificationEnabled; }); widget.preferences.setBool( "isPersistentNotificationEnabled", isPersistentNotificationEnabled); } This function sets the value of isPersistentNotificationEnabled preference. Now on the native android end, I am supposed to use this shared preference value. Here's what I have done so far.

问题 I erased in my folder .pub-cache/hosted/pub.dartlang.org/this_plugin What is the command to update the dependencies inside pubsec.yaml ? I believe it is flutter packages get The folder under .pub-cache is still not up to date. Note: there was a pubspec.lock that I deleted 回答1: Remove the package from dependencies in pubspec.yaml , run flutter packages get . And then add the package to dependencies again and running flutter packages get .This process has solved the problem for me in the past.

问题 As soon as I updated the flutter to version 1.12.13 I found this issue and can't fix it. I did as the firebase_messaging tutorial sent and got the following error: "error: incompatible types: PluginRegistry cannot be converted to FlutterEngine GeneratedPluginRegistrant.registerWith (registry); " My code is as follows: package io.flutter.plugins; import io.flutter.app.FlutterApplication; import io.flutter.plugin.common.PluginRegistry; import io.flutter.plugin.common.PluginRegistry

问题 It contains lots of list and nested objects. I need to display all the DishName from the json file Json URL adress : Json address!! Check this out i wanted to display the DishName in to my app in which there are lots of dishname in the json list. i parsed the json file using instantly parse json website. But now i dont know how to implent it on my app code i wrote : body: Container( child: Center( child: FutureBuilder( future: DefaultAssetBundle.of(context).loadString('jsons/data.json'),

问题 Here's my folder structure for the package core : /pubspec.yaml /assets |-images |-lang |- en.json |- hi.json I have a similar structure for another module called moduleA Now when I load the json file I load it like so : await rootBundle.loadString('assets/lang/en.json'); But issue is that when I use the screens of 'core' module in 'moduleA' , 'core' module looks inside the 'moduleA' to search for the filepath. What I need is a way to specify which package to load the file from : Now I have

问题 The bounty expires in 2 days . Answers to this question are eligible for a +50 reputation bounty. Tom O wants to draw more attention to this question. 1. Problem description My goal is to build a Flutter app that gets periodic location updates using this workmanager plugin and using this location plugin. But I can't get the Location plugin to be loaded properly when my Workmanager callback fires. I get this error: MissingPluginException(No implementation found for method getLocation on