Gradle 无法解析未请求的版本

Question

我正在更新 Android 项目中的 Firebase 和 Google Play 服务。这就是我更新依赖项的方式：

//Play Services
implementation 'com.google.android.gms:play-services-maps:16.0.0'
implementation 'com.google.android.gms:play-services-gcm:16.0.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'
implementation 'com.google.android.gms:play-services-measurement-base:16.0.5'
implementation 'com.google.maps.android:android-maps-utils:0.5'

//Firebase
implementation 'com.google.firebase:firebase-core:16.0.5'
implementation 'com.google.firebase:firebase-messaging:17.3.4'
implementation 'com.google.firebase:firebase-config:16.1.0'
implementation 'com.onesignal:OneSignal:3.10.3'

当我构建项目时失败并出现以下错误：

Failed to resolve: com.google.android.gms:play-services-maps:17.3.4
Failed to resolve: com.google.android.gms:play-services-gcm:17.3.4
Failed to resolve: com.google.android.gms:play-services-location:17.3.4
Failed to resolve: com.google.android.gms:play-services-measurement-base:17.3.4
Failed to resolve: com.google.firebase:firebase-core:17.3.4
Failed to resolve: com.google.firebase:firebase-config:17.3.4
Failed to resolve: com.google.android.gms:play-services-basement:17.3.4
Failed to resolve: com.google.android.gms:play-services-tasks:17.3.4
Failed to resolve: com.google.firebase:firebase-common:17.3.4
Failed to resolve: com.google.firebase:firebase-iid:17.3.4
Failed to resolve: com.google.firebase:firebase-measurement-connector:17.3.4
Failed to resolve: com.google.android.gms:play-services-base:17.3.4

出于某种原因，所有库都需要版本 17.3.4。如何让它发挥作用？

根 gradle 文件如下所示：

buildscript {
    ext.kotlin_version = '1.3.10'
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.2.0'
    }
}

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

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

Answer 1

在 google 库中，出于某种原因，它要求所有版本都相同，因此它采用更高版本并尝试在所有其他库上获取相同版本。

您需要降级其他库并将它们全部置于同一版本，这样就可以了。

Answer 2

我之前遇到过 OneSignal 和依赖项的问题（例如 dependency conflict with itself）。我建议回滚到早期版本的库，看看它是否是最近的问题。

您是否也可以尝试将 mavenCentral() 添加为存储库，因为它（至少以前）托管在那里。

Answer 3

我将 OneSignal 插件移到了插件的顶部，出于某种原因它有所帮助。

apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

Gradle 无法解析未请求的版本

Gradle cannot resolve version that is not requested

android

firebase

gradle

google-play-services

onesignal