java - Gradle 构建错误 : Unable to load Maven meta-data from https://repo1. maven.org/maven2/io/fabric/tools/gradle/maven-metadata.xml

Question

我在 Android studio 中遇到 gradle 构建错误，如下所示:

    Error:A problem occurred configuring project ':MyApp'.
    Could not resolve all dependencies for configuration ':MyApp:classpath'.
    Could not resolve io.fabric.tools:gradle:1.+.     
Required by:
    sw-android:MyApp:unspecified
    Failed to list versions for io.fabric.tools:gradle.
        Unable to load Maven meta-data from     
    https://repo1.maven.org/maven2/io/fabric/tools/gradle/maven-metadata.xml.
     Could not GET 'https://repo1.maven.org/maven2/io/fabric/tools/gradle/maven-metadata.xml'.
    peer not authenticated
        Failed to list versions for io.fabric.tools:gradle.
        Unable to load Maven meta-data from  
        http://maven.fabric.io/public/io/fabric/tools/gradle/maven-metadata.xml.
        Could not GET http://maven.fabric.io/public/io/fabric/tools/gradle/maven-metadata.xml'.
        peer not authenticated

我发现“https”标签无法下载 Maven URL，所以我在 build.gradle 文件中将 https 更改为 http。我还检查了所有 gradle 设置并手动修改路径 C:\Users\Ashfaque1.AndroidStudio\config\options\中的 other.xml 文件，但它仍然采用 https://repo1.maven.org/maven2/io/fabric/tools/gradle/maven-metadata.xml .此外，一旦我点击浏览器的此链接，我就会收到 404 异常，但错误中的第二个 URL http://maven.fabric.io/public/io/fabric/tools/gradle/maven-metadata.xml ，我能够成功命中并在我的系统中正确下载元数据文件。无法理解问题所在，我需要更改设置以便下载元数据文件。请建议我是否需要更改任何设置或从哪里获取此 URL https://repo1.maven.org/maven2//io/fabric/tools/gradle/maven-metadata.xml

我的build.gradle文件如下:

    apply plugin: 'com.android.application'
    apply plugin: 'io.fabric'

    buildscript {
    repositories {
        mavenCentral()
        maven { url 'http://maven.fabric.io/public' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.1.0'
        classpath 'io.fabric.tools:gradle:1.+'
    }
    }

    repositories {
        mavenCentral()
        maven { url 'http://maven.fabric.io/public' }
    }

    dependencies {
    compile 'com.android.support:multidex:1.0.0'
    compile fileTree(dir: 'libs',include: '*.jar')
    compile project(':DeviceService')
    compile project(':RatioCommon')
    compile project(':SlidingMenu:library')   
    compile project(':SmartViewLibrary:SmartView')
    compile project(':SmartViewLibrary:OpenAccess')
    compile('com.crashlytics.sdk.android:crashlytics:2.2.0@aar') {
        transitive = true;
    }
   }
   compileSdkVersion 21
   buildToolsVersion "21.1.2"

   defaultConfig {
        minSdkVersion 18
        targetSdkVersion 21


        // Enabling multidex support.
        multiDexEnabled true
    }

    dexOptions {
        javaMaxHeapSize "4g"
    }
   }

Answer 1

如果你像我过去两天一样查看了 Stack 中的所有主题后仍然无法构建 gradle，那么你可能还应该检查一下你之前是否使用过“Proxy”，有两个文件名为gradle 包中的 gradle.properties。

如果您在 android studio 有可能在其中一个 gradle.properties 文件中添加该信息之前使用过代理，那么请查看它们，如果您看到类似以下内容:

systemProp.https.proxyHost=your_proxy_host
systemProp.https.proxyPort=your_proxy_port
systemProp.https.proxyUser=your_proxy_username
systemProp.https.proxyPassword=your_proxy_password

或

systemProp.http.proxyHost=your_proxy_host
systemProp.http.proxyPort=your_proxy_port
systemProp.http.proxyUser=your_proxy_username
systemProp.http.proxyPassword=your_proxy_password

只需删除它们，然后使缓存无效并重新启动您的 android studio 并运行该项目，我相信您会没事的。