react-native run-android => 无法解析配置 ':classpath' 的所有依赖项

Question

我在环境中正确插入 java_home 并在 cmd 中测试它。我正在使用代理连接到互联网，并且可以下载 react-native 包。adb 设备在 cmd 上正常运行，但是在运行“react-native run-android”命令时，我给出以下错误：

D:\amoz\react-native\1\pro\test>react-native run-android
Scanning folders for symlinks in D:\amoz\react- 
native\1\pro\test\node_modules (8
7ms)
Starting JS server...
Building and installing the app on the device (cd android && gradlew.bat 
install
Debug)...
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by 
org.gradle.internal.reflect.JavaMethod (fi
le:/C:/Users/01/.gradle/wrapper/dists/gradle-3.5.1- 
all/42vjebfdws9pjts3l4bouoq0p
/gradle-3.5.1/lib/gradle-base-services-3.5.1.jar) to method 
java.lang.ClassLoade
r.getPackages()
WARNING: Please consider reporting this to the maintainers of 
org.gradle.interna
l.reflect.JavaMethod
WARNING: Use --illegal-access=warn to enable warnings of further illegal 
reflect
ive access operations
WARNING: All illegal access operations will be denied in a future 
release

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'test'.
> Could not resolve all dependencies for configuration ':classpath'.
 > Could not resolve com.android.tools.build:gradle:2.3.3.
 Required by:
     project :
  > Could not resolve com.android.tools.build:gradle:2.3.3.
     > Could not get resource 'https://jcenter.bintray.com/com/android/tools
/build/gradle/2.3.3/gradle-2.3.3.pom'.
        > Could not GET 'https://jcenter.bintray.com/com/android/tools/build
/gradle/2.3.3/gradle-2.3.3.pom'.
           > Connect to jcenter.bintray.com:443 [jcenter.bintray.com/108.168
.243.150] failed: Connection timed out: connect

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug
option to get more log output.

BUILD FAILED

Total time: 26.739 secs
Could not install the app on the device, read the error above for 
details.
Make sure you have an Android emulator running or a device connected and 
have
set up your Android development environment:
https://facebook.github.io/react-native/docs/getting-started.html

即使我在 allprojects 中将 Google() 添加到 build.gradle{} 它也不再起作用。并且仍然给出那个错误。顺便说一句，我使用的是 JDK 版本 9 和 gradle 版本 2.3.3

Answer 1

不幸的是，由于美国的制裁，Jcenter 阻止了伊朗的请求。您可以使用 Hotspot Shield 连接到 Jcenter，其他 VPN 提供商可能无法正常工作。我建议您通过以下更改更新您的 gradle：

1-变化gradle这个版本classpath 'com.android.tools.build:gradle:3.1.1'中android/build.gradle

2-将 distributionUrl 从更改android/gradle/wrapper/gradle-wrapper.properties为distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

3-android/build.gradle像这样添加存储库：

repositories {
        mavenLocal()
        google()
        jcenter()
        maven { url "https://jitpack.io" }
        maven { url 'https://maven.google.com' }
    }

4-启动Hotspot Shield并构建项目。

我希望这可以帮助你。