无法解析配置“：classpath”的所有文件

Question

我正在react-native中开发示例应用程序，当我运行android模拟器时我遇到了这个问题，我的sdk工具版本是25，但我不知道它是如何出现这个问题的，请让我提出建议。

> Could not resolve all files for configuration ':classpath'.
   > Could not resolve com.android.tools.build:gradle:3.1.0.
     Required by:
         project :
      > Could not resolve com.android.tools.build:gradle:3.1.0.
         > Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.1.0/gradle-3.1.0.pom'.
            > org.apache.http.ssl.SSLInitializationException: \Library\Java\Home\jre\lib\security\cacerts (The system cannot find the path specified)
      > Could not resolve com.android.tools.build:gradle:3.1.0.
         > Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.0/gradle-3.1.0.pom'.
            > org.apache.http.ssl.SSLInitializationException: \Library\Java\Home\jre\lib\security\cacerts (The system cannot find the path specified)
   > Could not resolve com.google.gms:google-services:3.2.0.
     Required by:
         project :
      > Could not resolve com.google.gms:google-services:3.2.0.
         > Could not get resource 'https://dl.google.com/dl/android/maven2/com/google/gms/google-services/3.2.0/google-services-3.2.0.pom'.
            > org.apache.http.ssl.SSLInitializationException: \Library\Java\Home\jre\lib\security\cacerts (The system cannot find the path specified)
      > Could not resolve com.google.gms:google-services:3.2.0.
         > Could not get resource 'https://jcenter.bintray.com/com/google/gms/google-services/3.2.0/google-services-3.2.0.pom'.
            > org.apache.http.ssl.SSLInitializationException: \Library\Java\Home\jre\lib\security\cacerts (The system cannot find the path specified)

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Answer 1

您的项目无法访问下载必要库的网址。这很可能是 gradle 配置问题。

build.gradle像这样更改您的项目级别文件：

buildscript {
repositories {

    google()
   jcenter()
}

dependencies {
    classpath 'com.android.tools.build:gradle:3.2.1'  
}

}

更新

如果它不起作用，也请尝试以下操作：

  repositories {
        jcenter()
        maven { url 'https://maven.google.com' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0-alpha2'
        ...
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url 'https://maven.google.com' }
    }
}