由於網關錯誤，無法解析 Android 依賴項：502

Question

12 月 8 日，我開始在運行 Android 項目（使用 Flutter 框架創建）時遇到問題，該項目已經發布到 Google Play，之前編譯時從未出現過問題。

我得到的錯誤如下：

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

所以我開始挖掘，發現我最近的變化不是問題。 而且 Bintray 下載中心似乎在 12 月 1 日日落（google.bintray.com）

由於我使用的是某些 Firebase 軟件包的舊版本，因此該鏈接似乎已關閉，現在我無法編譯我的應用程序。

Flutter 博士 output：

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!

這是我的build.gradle ：

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
}

這是我的 app/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 封裝版本如下：

• cloud_firestore : ^0.16.0+1
• firebase_analytics : ^7.0.1
• firebase_auth : ^0.20.1
• firebase_core : ^0.7.0
• firebase_crashlytics : ^0.4.0+1
• firebase_dynamic_links : ^0.7.0
• firebase_messaging : ^8.0.0-dev.14
• firebase_remote_config : ^0.6.0
• firebase_storage : ^7.0.0

我知道，這些是 Firebase 軟件包的過時版本（由於多種原因，將它們升級到下一個版本是不可行的）

問題似乎與 Firebase Analytics package 有關。 我曾嘗試將其刪除，但隨后出現了應用程序所需的 Firebase Cloud Firestore package 的類似錯誤。

請有人可以幫我解決這個問題。 我嘗試了多種方法，但似乎沒有任何方法可以解決這個問題，我需要編譯應用程序以盡快推出新版本！

Answer 1

Basic problem that version of com.google.android.gms:play-services-measurement-base:[18.0.0] is not specified strictly and gradle have to find possible versions but google.bintray.com is down - no version listing available

解決此問題的基本流程

1. 查找版本是什么 - 這個[18.0.0]意味着它有版本范圍Gradle 聲明版本和范圍

2. 搜索com.google.android.gms:play-services-measurement-base的版本，找到可以設置Maven search的版本。 我們有版本 18.0.0 - 18.0.3

3. [ 和 ] 符號表示僅包含一個版本的包含性界限 - 因此請考慮使用 18.0.0 Gradle 聲明版本和范圍

4. 使用最大可能版本 18.0.0 約束您的傳遞依賴

編輯您的項目app/build.gradle ：

dependencies {
  ...
  constraints {
    implementation('com.facebook.android:facebook-login') {
        version {
            strictly '18.0.0'
        }
    }
  }
}

Answer 2

我通過將 Gradle 版本升級到 v4.1.0 解決了這個問題

安卓/build.gradle：

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

android/gradle/wrapper/gradle-wrapper.properties：

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