在过去的几个月里,我一直在加载很多图像,但是突然,Flutter没有加载任何图像。我已经检查了pubspect.yaml,资产的名称和颤动医生没有给出任何错误。颤动医生: [√] Flutter (Channel stable, v1.12.13+hotfix.5, on Microsoft Windows [Versión 10.0.18363.535], locale es-ES)
• Flutter version 1.12.13+hotfix.5 at C:\flutter\flutter
• Framework revision 27321ebbad (6 day
我正在尝试从pub dev读取我的goggle 'gcloud‘库中的数据。但有一个错误调用,
W/DynamiteModule( 9106): Local module descriptor class for providerinstaller not found.
I/DynamiteModule( 9106): Considering local module providerinstaller:0 and remote module providerinstaller:0
W/ProviderInstaller( 9106): Failed to load provideri
我在运行我得到的type 'Null' is not a subtype of type 'String'代码时正在做一个颤振课程。
我的代码:
import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import '../widgets/drawer.dart';
我制作了一个充当图像传送带的PageView。我如何让它在Flutter中延迟一段时间后,自动无限地在页面之间滚动? new PageView(
children: List<Widget> {
new Container(
decoration: BoxDecoration(
image: DecorationImage(image: new
我正在构建一个Hangman应用程序在颤振和我希望主图像更新到另一个当生命减少。问题是,当我第一次运行这个应用程序时,我得到了以下错误:
I/flutter (21336): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════
I/flutter (21336): The following assertion was thrown resolving an image codec:
I/flutter (21336): Unable to lo
我有带物品的Table1
ColumnA
Apple
Pear
我有带物品的Table2
ColumnB
Banana
Apple
Pear
它希望创建一个具有以下内容的输出:
ColumnB Matched
Banana 0
Apple 1
Pear 1
我正在尝试使用以下查询
SELECT ColumnB
FROM Table2 WHERE
ColumnB IN (SELECT ColumnA FROM Table1)
然而,这只显示了我感兴趣的项目标签,但没有创建一个标签列。
我将颤振代码从Windows复制到MacOS,并试图运行它,但它遇到了这个错误: Execution failed for task ':app:compileFlutterBuildDebug'.
> java.net.URISyntaxException: Illegal character in opaque part at index 2: D:\\Gocut Cares Application\\gocutcare\\android\\app\\build\\intermediates\\flutter\\debug\\flutter_assets\\Asse
我的pubspec.yaml
environment:
sdk: '>=2.15.0-116.0.dev <3.0.0'
当我跑的时候
flutter build appbundle/apk
印出来
Building without sound null safety
For more information see https://dart.dev/null-safety/unsound-null-safety
Running Gradle task 'bundleRelease'...
我是个初学者,想要在我的一个小部件中放置一个图像,但是请告诉我下面的错误:
The following assertion was thrown resolving an image codec:
Unable to load asset: ../w.png
When the exception was thrown, this was the stack
#0 PlatformAssetBundle.load
package:flutter/…/services/asset_bundle.dart:221
<asynchronous suspension>
#1
我在Ubuntu 20.04 LTE上
我的Android位置(在Android中显示)是/home/myuser/Android/Sdk。
错误如下:
✗] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Androi