由于网关错误，无法解析Android依赖项：502

Question

12月8日，我开始在运行一个Android项目（使用Flatter框架创建）时遇到问题，该项目已经发布到Google Play上，在编译之前从未出现过问题。

我得到的错误如下：

Could not determine the dependencies of task ':app:processDebugResources'.
> Could not resolve all task dependencies for configuration ':app:debugRuntimeClasspath'.



   > Could not resolve com.google.android.gms:play-services-measurement-base:[18.0.0].
     Required by:


         project :app > project :firebase_analytics > com.google.firebase:firebase-analytics:18.0.0 > com.google.android.gms:play-services-measurement:18.0.0


         project :app > project :firebase_analytics > com.google.firebase:firebase-analytics:18.0.0 > com.google.android.gms:play-services-measurement-api:18.0.0
         project :app > project :firebase_analytics > com.google.firebase:firebase-analytics:18.0.0 > com.google.android.gms:play-services-measurement-sdk:18.0.0
         project :app > project :firebase_analytics > com.google.firebase:firebase-analytics:18.0.0 > com.google.android.gms:play-services-measurement:18.0.0 > com.google.android.gms:play-services-measurement-impl:18.0.0
         project :app > project :firebase_analytics > com.google.firebase:firebase-analytics:18.0.0 > com.google.android.gms:play-services-measurement-api:18.0.0 > com.google.android.gms:play-services-measurement-sdk-api:18.0.0





      > Failed to list versions for com.google.android.gms:play-services-measurement-base.
         > Unable to load Maven meta-data from https://google.bintray.com/exoplayer/com/google/android/gms/play-services-measurement-base/maven-metadata.xml.
            > Could not get resource 'https://google.bintray.com/exoplayer/com/google/android/gms/play-services-measurement-base/maven-metadata.xml'.


               > Could not GET 'https://google.bintray.com/exoplayer/com/google/android/gms/play-services-measurement-base/maven-metadata.xml'. Received status code 502 from server: Bad Gateway

所以我开始挖掘，发现我最近的变化不是问题所在。Bintray下载中心似乎是12月1日的日落（google.Bintray.com）

由于我使用的是一些Firebase软件包的旧版本，因此此链接似乎已关闭，现在我无法编译我的应用程序。

颤振医生输出：

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel unknown, 2.0.3, on macOS 11.4 20F71 darwin-arm, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 2020.3)
[✓] VS Code (version 1.63.1)
[✓] Connected device (3 available)

• No issues found!

这是我的构建。格雷德尔：

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        mavenCentral()
        jcenter()
        
    }

    dependencies {
        classpath 'com.google.gms:google-services:4.3.5'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.5.1'
        classpath 'com.android.tools.build:gradle:3.5.4'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

这是我的应用程序/build.gradle：

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
  throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
  throw new GradleException("versionCode not found. Define flutter.versionCode in the local.properties file.")

}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
  throw new GradleException("versionName not found. Define flutter.versionName in the local.properties file.")
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'

android {
    compileSdkVersion 30

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.reliqium.reliqium"
        minSdkVersion 24
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    signingConfigs {
        release {
           if (System.getenv()["CI"]) { // CI=true is exported by Codemagic
               storeFile file(System.getenv()["FCI_KEYSTORE_PATH"])
               storePassword System.getenv()["FCI_KEYSTORE_PASSWORD"]
               keyAlias System.getenv()["FCI_KEY_ALIAS"]
               keyPassword System.getenv()["FCI_KEY_PASSWORD"]
           } else {
                keyAlias System.getenv("RELIQIUM_ANDROID_KEYSTORE_ALIAS")
                keyPassword System.getenv("RELIQIUM_ANDROID_KEYSTORE_PRIVATE_KEY_PASSWORD")
                storeFile file(System.getenv("HOME") + "/keystores/reliqiumapp.keystore")
                storePassword System.getenv("RELIQIUM_ANDROID_KEYSTORE_PASSWORD")
           }
       }
   }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.release
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation 'com.android.support:multidex:1.0.3'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.facebook.android:facebook-core:7.0.1'
    implementation 'com.facebook.android:facebook-login:7.0.1'
    implementation "com.airbnb.android:lottie:3.5.0"
    implementation "com.android.support.constraint:constraint-layout:2.0.4"
}

Flutter Firebase软件包的版本如下：

• cloud_firestore:^0.16.0 1
• firebase_分析：^7.0.1
• firebase_认证：^0.20.1
• firebase_核心：^0.7.0
• firebase\u crashlytics:^0.4.0 1
• firebase_动态链接：^0.7.0
• firebase_消息：^8.0.0-dev.14
• firebase_remote_配置：^0.6.0
• firebase_存储：^7.0.0

我知道，这些都是Firebase软件包的过时版本（出于多种原因，无法将它们升级到下一个版本）

问题似乎与Firebase Analytics（分析）软件包有关。我试图删除它，但后来我得到了一个类似的错误，Firebase Cloud Fi还原包是应用程序所需的。

有人能帮我吗。我已经尝试了多种方法，但似乎没有任何方法可以解决这个问题，我需要编译应用程序以尽快推出新版本！

Answer 1

我通过升级我的Gradle版本到v4.1.0解决了这个问题

android/build。格拉德尔：

dependencies {
  ...
  classpath 'com.android.tools.build:gradle:4.1.0'
  ...
}

android/gradle/wrapper/gradle wrapper。特性：

...
distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

（编辑）：你还需要一些东西：

1. 从build.gradle中删除jcenter（）

buildscript {
  ...
  repositories {
    google()
    mavenCentral() // add this
    // jcenter() // remove this
  }
}
...

allprojects {
  repositories {
     google()
     mavenCentral()// ADD THIS
     // jcenter() // REMOVE THIS
  }
}

android {
  ... 
  buildTypes {
    release {
      signingConfig signingConfigs.release
      minifyEnabled false // ADD THIS
      shrinkResources false // ADD THIS
    }
  }
  ...
}

Answer 2

基本问题，版本的com.google.android.gms： play-services-metating-base：[18.0.0]没有严格指定和gradle必须找到可能的版本，但google.bintray.com是下降-没有可用的版本列表

解决此问题的基本流程

>

查找版本-这[18.0.0]意味着它有版本范围渐变声明版本和范围

搜索com.google.android.gms的版本：play-services-umating-base，找到可以设置Maven search的版本。我们有版本18.0.0 - 18.0.3

[and ]符号表示只有一个版本的包容性绑定，因此考虑完全采用18.0个级别的html" target="_blank">声明版本和范围。

使用最大可能版本18.0.0约束您的可传递依赖项

编辑您的项目应用程序/生成。格拉德尔：

dependencies {
  ...
  constraints {
    implementation('com.google.android.gms:play-services-measurement-base') {
        version {
            strictly '18.0.0'
        }
    }
  }
}