一、遇到的问题(Android-Gradle)
- 解决办法
- 新的问题(UE需要从网络上获取资源)
  - 一、Could not get resource ‘https://repo.maven.apache.org/maven2/…’
  - 二、Exception in thread “main” java.net.ConnectException: Connection timed out: connect
    - 1、方法一
    - 2、方法二
二、无法在禁用异常的情况下使用“try”
三、Error NU1903

~~在新电脑配置Android打包环境后打包可能出现各种各样的错误，本篇将由于Gradle而出现的错误，进行分享~~。将我遇到的一些打包失败的问题和解决办法进行分享

一、遇到的问题(Android-Gradle)

UATHelper: 打包 (Android (ASTC)): Creating rungradle.bat to work around commandline length limit (using unused drive letter Y:)
UATHelper: 打包 (Android (ASTC)): Making .apk with Gradle...
UATHelper: 打包 (Android (ASTC)): Downloading https://services.gradle.org/distributions/gradle-7.5-all.zip
UATHelper: 打包 (Android (ASTC)): ..............................................................................................................................................................
UATHelper: 打包 (Android (ASTC)): Unzipping C:\Users\My\.gradle\wrapper\dists\gradle-7.5-all\6qsw290k5lz422uaf8jf6m7co\gradle-7.5-all.zip to C:\Users\My\.gradle\wrapper\dists\gradle-7.5-all\6qsw290k5lz422uaf8jf6m7co
UATHelper: 打包 (Android (ASTC)): Welcome to Gradle 7.5!
UATHelper: 打包 (Android (ASTC)): Here are the highlights of this release:
UATHelper: 打包 (Android (ASTC)):  - Support for Java 18
UATHelper: 打包 (Android (ASTC)):  - Support for building with Groovy 4
UATHelper: 打包 (Android (ASTC)):  - Much more responsive continuous builds
UATHelper: 打包 (Android (ASTC)):  - Improved diagnostics for dependency resolution
UATHelper: 打包 (Android (ASTC)): For more details see https://docs.gradle.org/7.5/release-notes.html
UATHelper: 打包 (Android (ASTC)): To honour the JVM settings for this build a single-use Daemon process will be forked. See https://docs.gradle.org/7.5/userguide/gradle_daemon.html#sec:disabling_the_daemon.
UATHelper: 打包 (Android (ASTC)): Daemon will be stopped at the end of the build 
UATHelper: 打包 (Android (ASTC)): FAILURE: Build failed with an exception.
UATHelper: 打包 (Android (ASTC)): * What went wrong:
UATHelper: 打包 (Android (ASTC)): A problem occurred configuring root project 'app'.
UATHelper: 打包 (Android (ASTC)): > Could not resolve all files for configuration ':classpath'.
UATHelper: 打包 (Android (ASTC)):    > Could not resolve com.android.tools.build:gradle:7.4.2.
UATHelper: 打包 (Android (ASTC)):      Required by:
UATHelper: 打包 (Android (ASTC)):          project :
UATHelper: 打包 (Android (ASTC)):       > No matching variant of com.android.tools.build:gradle:7.4.2 was found. The consumer was configured to find a runtime of a library compatible with Java 8, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '7.5' but:
UATHelper: 打包 (Android (ASTC)):           - Variant 'apiElements' capability com.android.tools.build:gradle:7.4.2 declares a library, packaged as a jar, and its dependencies declared externally:
UATHelper: 打包 (Android (ASTC)):               - Incompatible because this component declares an API of a component compatible with Java 11 and the consumer needed a runtime of a component compatible with Java 8
UATHelper: 打包 (Android (ASTC)):               - Other compatible attribute:
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about org.gradle.plugin.api-version (required '7.5')
UATHelper: 打包 (Android (ASTC)):           - Variant 'javadocElements' capability com.android.tools.build:gradle:7.4.2 declares a runtime of a component, and its dependencies declared externally:
UATHelper: 打包 (Android (ASTC)):               - Incompatible because this component declares documentation and the consumer needed a library
UATHelper: 打包 (Android (ASTC)):               - Other compatible attributes:
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about its target Java version (required compatibility with Java 8)
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about its elements (required them packaged as a jar)
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about org.gradle.plugin.api-version (required '7.5')
UATHelper: 打包 (Android (ASTC)):           - Variant 'runtimeElements' capability com.android.tools.build:gradle:7.4.2 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
UATHelper: 打包 (Android (ASTC)):               - Incompatible because this component declares a component compatible with Java 11 and the consumer needed a component compatible with Java 8
UATHelper: 打包 (Android (ASTC)):               - Other compatible attribute:
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about org.gradle.plugin.api-version (required '7.5')
UATHelper: 打包 (Android (ASTC)):           - Variant 'sourcesElements' capability com.android.tools.build:gradle:7.4.2 declares a runtime of a component, and its dependencies declared externally:
UATHelper: 打包 (Android (ASTC)):               - Incompatible because this component declares documentation and the consumer needed a library
UATHelper: 打包 (Android (ASTC)):               - Other compatible attributes:
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about its target Java version (required compatibility with Java 8)
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about its elements (required them packaged as a jar)
UATHelper: 打包 (Android (ASTC)):                   - Doesn't say anything about org.gradle.plugin.api-version (required '7.5')
UATHelper: 打包 (Android (ASTC)): * Try:
UATHelper: 打包 (Android (ASTC)): > Run with --stacktrace option to get the stack trace.
UATHelper: 打包 (Android (ASTC)): > Run with --info or --debug option to get more log output.
UATHelper: 打包 (Android (ASTC)): > Run with --scan to get full insights.
UATHelper: 打包 (Android (ASTC)): * Get more help at https://help.gradle.org
UATHelper: 打包 (Android (ASTC)): BUILD FAILED in 11m 50s

此时配置：

[/Script/AndroidPlatformEditor.AndroidSDKSettings]
SDKPath=(Path="C:/Users/My/AppData/Local/Android/Sdk")
NDKPath=(Path="C:/Users/My/AppData/Local/Android/Sdk/ndk/25.1.8937393")
JavaPath=(Path="C:/Program Files/Android/Android Studio/jre")
SDKAPILevel=matchndk
NDKAPILevel=latest

解决办法

在报错中看到了

`Incompatible because this component declares an API of a component compatible with Java 11 and the consumer needed a runtime of a component compatible with Java 8`

怀疑：需要Java11

解决办法：

一：下载并安装Java11

从Oracle官方网站下载Java11并安装。

下载：jdk-11.0.23_windows-x64_bin.exe
安装：打开程序一步一步走就行。
(非必需)如果下载需要登录，可以上网查一下Oracle帐号，网上有需要的分享账号可以登录，或者可以直接看：Oracle官网账号及密码

如果还不会请看(也有配置环境变量的步骤)：jdk11 下载与安装（非常详细，一步不落！！！）

二：配置环境变量

配置环境变量是为了让操作系统能够找到Java 11的安装路径。

打开系统环境变量（右键此电脑->属性->高级系统设置->环境变量）。
在系统变量中，找到Path，点击后再点击编辑。
点击新建，输入刚才安装Java11的位置里面的bin文件夹的位置，例如：C:\Program Files\Java\jdk-11\bin（默认路径）
点击确定。

三：配置Android Studio(可能不需要，但我还是配置了)

告诉Android Studio使用Java 11作为默认的Java版本，每个人由于Android Studio版本不同可能不一样。

打开Android Studio。
点击File菜单，选择Project Structure。
在左侧面板中，选择SDKs。
在中间面板中，点击+号，选择JDK。
点击JDK home path的选择文件夹按钮，选择Java 11的安装路径，如C:\Program Files\Java\jdk-11。
点击应用按钮
点击左侧面板的Project，在右侧的Project SDK中选择你刚才新添加的11。
点击应用(Apply)按钮.

参考：解决 Could not resolve com.android.tools.build:gradle:7.4.1

到这里大家应该都可以成功打包了

1. 不过如果和我NDKAPILevel=latest配置相同且双击Install_ProjectName-arm64.bat后安装失败且控制台出现下面的报错，则需要改为NDKAPILevel=android-29：

Installing existing application. Failures here indicate a problem with the device (connection or storage permissions) and are fatal.

C:\Users\MY\Documents\Unreal Projects\VRTest\Build\Android_ASTC>C:/Users/My/AppData/Local/Android/Sdk\platform-tools\adb.exe  install VRTest-arm64.apk
Performing Streamed Install
adb: failed to install VRTest-arm64.apk: Failure [INSTALL_FAILED_OLDER_SDK: Failed parse during installPackageLI: /data/app/vmdl1195727077.tmp/base.apk (at Binary XML file line #8): Requires newer sdk version #33 (current version is #29)]

There was an error installing the game or the obb file. Look above for more info.

Things to try:
Check that the device (and only the device) is listed with "ADB$ devices" from a command prompt.
Make sure all Developer options look normal on the device
Check that the device has an SD card.
请按任意键继续. . .

如果出现下面的报错请移步新的问题章节

A problem occurred configuring root project 'app'.
> Could not resolve all files for configuration ':classpath'.
   > Could not download netty-common-4.1.52.Final.jar (io.netty:netty-common:4.1.52.Final)
      > Could not get resource 'https://repo.maven.apache.org/maven2/io/netty/netty-common/4.1.52.Final/netty-common-4.1.52.Final.jar'.
         > Read timed out

新的问题(UE需要从网络上获取资源)

一、Could not get resource ‘https://repo.maven.apache.org/maven2/…’

配置成功后，出现了新的报错:

A problem occurred configuring root project 'app'.
> Could not resolve all files for configuration ':classpath'.
   > Could not download netty-common-4.1.52.Final.jar (io.netty:netty-common:4.1.52.Final)
      > Could not get resource 'https://repo.maven.apache.org/maven2/io/netty/netty-common/4.1.52.Final/netty-common-4.1.52.Final.jar'.
         > Read timed out

经查阅说是Bintray 和 JCenter 截止 2021 年 3 月 30 日之后不能上传任何库，2022 年 2 月 1 日之后不能下载任何库。不过你可以先试试梯子可不可以，因为我觉得也有可能去国外的网速太慢了，毕竟2023年我还可以使用***打包。如果不行再继续往下看。

参考：JCenter挂掉后的解决方案

Gradle的全局配置(没办法进行项目配置，因为这些配置文件在Intermediate每次打包都会更新，不过应该可以不更新，但是我没查，如果你知道请告诉我)

在 C盘用户目录下的.gradle/ 目录下创建 init.gradle 文件(如：C:\Users\My\.gradle)，并添加以下内容：

allprojects {
    repositories {
        def ALIYUN_REPOSITORY_URL = 'https://maven.aliyun.com/repository/public'
        all { ArtifactRepository repo ->
            if(repo instanceof MavenArtifactRepository){
                def url = repo.url.toString()
                if (url.startsWith('https://repo1.maven.org/maven2')) {
                    project.logger.lifecycle "Repository ${repo.url} replaced by $ALIYUN_REPOSITORY_URL."
                    remove repo
                }
            }
        }
        maven { url ALIYUN_REPOSITORY_URL }
    }
}

保存，退出，再次打包就可以了.

参考：Maven、Gradle 配置国内镜像源

如果安装失败请点击跳转

二、Exception in thread “main” java.net.ConnectException: Connection timed out: connect

参考：Flutter新建项目运行报错Exception in thread “main” java.net.ConnectException: Connection timed out: connect

卡在Downloading https://services.gradle.org/distributions/gradle-6.1.1-all.zip后出现报错：

Exception in thread "main" java.net.ConnectException: Connection timed out: connect
        at java.net.DualStackPlainSocketImpl.connect0(Native Method)    
        at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)     
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)   
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:666)
        at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:173)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)  
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
        at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
        at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
        at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
        at org.gradle.wrapper.Download.download(Download.java:44)
        at org.gradle.wrapper.Install$1.call(Install.java:61)
        at org.gradle.wrapper.Install$1.call(Install.java:48)
        at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)  
        at org.gradle.wrapper.Install.createDist(Install.java:48)
        at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
        at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done                        26.4s
Exception: Gradle task assembleDebug failed with exit code 1

有两个方法

1、方法一

这个是lipengzha作者提供的(我试了，没用)

要么打包时开启全局代理(这样好像没办法获取阿里云的maven了)，要么将https://services.gradle.org/distributions/gradle-6.1.1-all.zip复制粘贴到浏览器上(复制你们自己的，我是6.1.1版本)，下载下来解压到以下路径：

C:\Users\lipengzha\.gradle\wrapper\dists\gradle-5.4.1-all\3221gyojl5jsh0helicew7rwx\gradle-6.1.1

然后创建一个环境变量 ANDROID_HOME 指向该路径即可。

2、方法二

仍然是下载对应版本的gradle压缩包，这个压缩包放在哪里都可以无需解压。

找到你安装UE引擎的路径点开，我的是：

C:\Program Files\Epic Games\UE_5.1\Engine\Build\Android\Java\gradle\gradle\wrapper

打开文件夹里面的gradle-wrapper.properties文件，将文件

distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip

改为(就是你的下载位置，我的是在 C:\Users\My\.gradle\wrapper\dists\gradle-6.1.1-all\cfmwm155h49vnt3hynmlrsdst 位置)

#distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
distributionUrl=file:///C:/Users/My/.gradle/wrapper/dists/gradle-6.1.1-all/cfmwm155h49vnt3hynmlrsdst/gradle-6.1.1-all.zip

那么此时打包log则变为，之后等一会如果没其他问题就成功了。

Creating rungradle.bat to work around commandline length limit (using unused drive letter Y:)
Making .apk with Gradle...

Running: cmd.exe /c "C:\Users\My\Documents\Unreal Projects\PicoVanGogh_8x8\Intermediate\Android\arm64\gradle\rungradle.bat" :app:assembleDebug
Downloading file:/C:/Users/My/.gradle/wrapper/dists/gradle-6.1.1-all/cfmwm155h49vnt3hynmlrsdst/gradle-6.1.1-all.zip
....................................................................................................................................
Unzipping C:\Users\My\.gradle\wrapper\dists\gradle-6.1.1-all\5t4tzev1x9ryeduc4hzp0bwx4\gradle-6.1.1-all.zip to C:\Users\My\.gradle\wrapper\dists\gradle-6.1.1-all\5t4tzev1x9ryeduc4hzp0bwx4

Welcome to Gradle 6.1.1!

二、无法在禁用异常的情况下使用“try”

参考：Cannot use ‘try’ with exceptions disabled

Unreal 不鼓励使用 c++ 的异常系统。这一设计决策背后有几个原因。使用异常会使代码变得非常复杂，尤其是在像 UE 这样复杂的系统中。它还可能导致内存泄漏。然而，这些问题可以说是由于语言设计本身不佳造成的，在其他语言中可能不会如此频繁地出现，即使在 C++ 开发人员中，异常的使用也被认为是一个公开的讨论。 Epic团队建议提前检查，而不是事后从故障中恢复。你可以使用断言宏报告意外行为（不可恢复和可恢复）。您还可以使用“checked”函数（如 CastChecked），如果出现错误，该函数会自动崩溃并显示诊断消息。大多数情况下，这是关于传递空指针或不支持的配置 - 只有重大错误才会导致这种情况发生。但是，如果你非得使用异常，请查看第一个链接并尝试那里的建议，不知道是否适用于较新的引擎版本。

解决办法：在你项目文件夹下的Source里有一个{ProjectName}.Build.cs文件，在构造函数中添加一行代码bEnableExceptions=true：

// Fill out your copyright notice in the Description page of Project Settings.

using UnrealBuildTool;

public class DoubaoTest : ModuleRules
{
	public DoubaoTest(ReadOnlyTargetRules Target) : base(Target)
	{
        //UEBuildConfiguration.bForceEnableExceptions = true;//如果下面没有试试这个，这个引擎版本低
		bEnableExceptions = true;//使用引擎5.1.1

		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
	
		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore" });

		PrivateDependencyModuleNames.AddRange(new string[] {  });
	}
}

你可以在源码中找到，在886行

/// <summary>
/// Enable exception handling
/// </summary>
public bool bEnableExceptions { get; set; }

三、Error NU1903

完整报错有很多行，我就选其中一行展示：

Gauntlet.Automation.csproj: Error NU1903 : Warning As Error: Package 'Magick.NET-Q16-HDRI-AnyCPU' 14.7.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-72hf-fj62-w6j4

这个在Epic社区也有人讨论：Vulnerability of Magik.net

我是参考下面这个办法解决的

I solved the issue by disabling the warnings inside the PackageReference tags in AutomationTool.csproj, AutomationUtils.Automation.csproj, and Gauntlet.Automation.csproj; i.e., respectively, I used:

<PackageReference Include="Magick.NET-Q16-HDRI-AnyCPU" Version="14.7.0">
  <NoWarn>$(NoWarn);NU1901;NU1902;NU1903</NoWarn>
</PackageReference>
<PackageReference Include="Magick.NET-Q16-HDRI-AnyCPU" Version="14.7.0" PrivateAssets="all">
  <NoWarn>$(NoWarn);NU1901;NU1902;NU1903</NoWarn>
</PackageReference>

and

<PackageReference Include="Magick.NET-Q16-HDRI-AnyCPU" Version="14.7.0" PrivateAssets="all">
  <NoWarn>$(NoWarn);NU1901;NU1902;NU1903</NoWarn>
</PackageReference>

Obviously, that’s not ideal because we are now only ignoring the vulnerability, but it does the trick if the goal is to continue using that package version.

让我们携手共创奇迹！

打包问题及解决办法