Flutter

How to upload image in firebase storage 5.0.1 with flutter [duplicate]

由 喜欢而已 提交于 2021-01-29 08:00:59
问题 This question already has answers here : Undefined class StorageReference when using Firebase Storage (3 answers) Closed 2 months ago . Recently a new version of firebase storage just came (5.0.1). There is a lot of changes. I can't seem to upload a photo and get the download URL of the photo. Can you provide a way to do it in firebase storage 5.0.1 回答1: import 'package:firebase_storage/firebase_storage.dart' as firebase_storage; for uploading file Future<void> uploadFile(String filePath)

StreamBuilder inside RefreshIndicator render child widget many times, how to avoid it?

由 安稳与你 提交于 2021-01-29 07:47:04
问题 When I put StreamBuilder in RefreshIndicator, it render widgets many times with scroll actions. I want to avoid many it because Charts inside StreamBuilder animate many times. I tested with following environment. $ flutter doctor -v [✓] Flutter (Channel stable, v1.2.1, on Mac OS X 10.13.6 17G5019, locale en-JP) • Flutter version 1.2.1 at /Users/matsue/work/flutter/flutter_macos_v1.0.0-stable • Framework revision 8661d8aecd (4 weeks ago), 2019-02-14 19:19:53 -0800 • Engine revision 3757390fa4

Getting this error - type 'Future<dynamic>' is not a subtype of type 'List<dynamic>'

由 微笑、不失礼 提交于 2021-01-29 07:42:52
问题 Whenever trying to call future data and trying converting to List , it returns the error type 'Future' is not a subtype of type 'List' Tried type-casting, but no help On HomePage.dart final getPost = NetworkFile().getPosts(); List posts; void getPostsList() { setState(() { var res = getPost; posts = res as List<dynamic>; print(posts); }); } On Network.dart class NetworkFile{ Future<dynamic> getPosts() async { var response = await http.get('$kBlogURL' + 'posts?_embed'); Iterable resBody =

如何在Flutter中集成华为认证服务

由 冷暖自知 提交于 2021-01-29 07:41:31
如何在Flutter中集成华为认证服务 最近发现华为AGC认证服务支持Flutter框架了，期待这个平台的支持已经很久了，所以迫不及待接入了，关联了自己的邮箱等账号。 集成步骤 安装flutter环境 a) 下载Flutter sdk包，地址： https://flutter.dev/docs/get-started/install/windows 将压缩包解压到任意文件夹，例如D:\Flutter b) 将flutter命令文件添加到环境变量中，此处我添加的Path为D:\Flutter\flutter_windows_1.22.2-stable\flutter\bin。 c) 在Android Studio中点击“File-Settings-Plugins”，下载Flutter和Dart插件，重启Android Studio使插件生效。 开通服务&创建工程 a) 在AGC创建Android应用并开通认证服务 b) 开启认证服务中的匿名帐号，手机帐号，邮箱帐号 c) 在Android Studio中新建Flutter工程 d) 将agconnect-services.json文件放入Android/app目录下 e) 配置Maven仓地址和AGC插件地址。 a. 打开Flutter项目android文件夹下的build.gradle文件。 b. 在allprojects -

Flutter firebase_ml_vision build failed with exception

由 主宰稳场 提交于 2021-01-29 07:41:04
问题 Android build keeps crashing with firebase_ml_vision being the dependency that causes it. Below is the output from the debug console when running a build for android. > In project 'app' a resolved Google Play services library dependency depends on another at an exact version (e.g. "[19.0. 2]", but isn't being resolved to that version. Behavior exhibited by the library will be unknown. Dependency failing: com.google.android.gms:play-services-vision:20.0.0 -> com.google.android.gms:play

How to show Flutter Widget documentation with Visual Studio Code IntelliSense?

由 走远了吗. 提交于 2021-01-29 07:39:11
问题 So, how can I show a Widget Documentation with VSCode auto complete? As we can see in this link, when hitting CTRL + SPACE with Android Studio and typing in a widget, it'll show its documentation. However, I couldn't find a way in Visual Studio Code to show a Widget documentation, only this. I know it's possible to hover the mouse over the Widget, but I don't want to read its doc after typing it, but instead, before. 来源： https://stackoverflow.com/questions/63350568/how-to-show-flutter-widget

How to show Flutter Widget documentation with Visual Studio Code IntelliSense?

由 爷，独闯天下 提交于 2021-01-29 07:31:02
问题 So, how can I show a Widget Documentation with VSCode auto complete? As we can see in this link, when hitting CTRL + SPACE with Android Studio and typing in a widget, it'll show its documentation. However, I couldn't find a way in Visual Studio Code to show a Widget documentation, only this. I know it's possible to hover the mouse over the Widget, but I don't want to read its doc after typing it, but instead, before. 来源： https://stackoverflow.com/questions/63350568/how-to-show-flutter-widget

Flutter Plugin: How to set a programatic Receiver with IntentFilter

由 我只是一个虾纸丫 提交于 2021-01-29 07:24:47
问题 Problem I have been working on a Flutter Plugin for the Radar SDK, however, I am unable to programmatically set my BroadcastReceiver. This works, but I cannot access my EventChannel When I set my Receiver in the android Manifest of the plugin, the receiver is called properly. The manifest can be seen below: <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.yourorg.appname"> <application android:name="io.flutter.app.FlutterApplication"> <receiver android:name="

Customize the click effect of a widget in Flutter

由 岁酱吖の 提交于 2021-01-29 07:21:00
问题 How to customize the click effect of a widget in Flutter, which can be configured in Android： <?xml version="1.0" encoding="UTF-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@drawable/btn_pressed" /> <!-- pressed --> <item android:state_focused="true" android:drawable="@drawable/btn_normal" /> <!-- focused --> <item android:drawable="@drawable/btn_normal" /> <!-- default --> </selector> I want to ask how to
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