我迁移到Android Studio 3和Gradle 4.然后我在build.gradle文件中将compile更改为implementation。但是我得到了错误：
Error:Execution failed for task ':app:preDebugBuild'.
> Android dependency 'com.google.firebase:firebase-core' has different version for the compile (9.0.0) and runtime (11.6.0) classpath. You should manually set the same version via DependencyResolution
当我将implementation更改为api时，错误消失。但这不是解决方案。我有app模块和一个库模块。 App build.gradle只有一个依赖项：
implementation project(':common-lib')
apply plugin: 'com.google.gms.google-services'正确放置在app build.gradle文件的底部（项目在迁移到Gradle 4之前工作）
gradlew应用程序的依赖关系：依赖关系（剪切文本）：
编译
debugAndroidTestCompileClasspath - Resolved configuration for compilation for variant: debugAndroidTest
+--- com.google.firebase:firebase-core:9.0.0
| \--- com.google.firebase:firebase-analytics:9.0.0
| +--- com.google.android.gms:play-services-basement:9.0.0
| | \--- com.android.support:support-v4:23.0.0
| | \--- com.android.support:support-annotations:23.0.0
| +--- com.google.firebase:firebase-common:9.0.0
| | +--- com.google.android.gms:play-services-basement:9.0.0 (*)
| | \--- com.google.android.gms:play-services-tasks:9.0.0
| | \--- com.google.android.gms:play-services-basement:9.0.0 (*)
| \--- com.google.firebase:firebase-analytics-impl:9.0.0
| +--- com.google.android.gms:play-services-base:9.0.0
| | +--- com.google.android.gms:play-services-basement:9.0.0 (*)
| | +--- com.google.firebase:firebase-common:9.0.0 (*)
| | \--- com.google.android.gms:play-services-tasks:9.0.0 (*)
| +--- com.google.android.gms:play-services-basement:9.0.0 (*)
| +--- com.google.firebase:firebase-iid:9.0.0
| | +--- com.google.android.gms:play-services-basement:9.0.0 (*)
| | \--- com.google.firebase:firebase-common:9.0.0 (*)
| \--- com.google.firebase:firebase-common:9.0.0 (*)
\--- project :common-lib
(............)
运行
debugAndroidTestRuntimeClasspath - Resolved configuration for runtime for variant: debugAndroidTest
+--- com.google.firebase:firebase-core:9.0.0 -> 11.6.0
| \--- com.google.firebase:firebase-analytics:11.6.0
| +--- com.google.android.gms:play-services-basement:11.6.0
| | +--- com.android.support:support-v4:25.2.0 -> 26.1.0
| | | +--- com.android.support:support-compat:26.1.0
| | | | +--- com.android.support:support-annotations:26.1.0
| | | | \--- android.arch.lifecycle:runtime:1.0.0
| | | | +--- android.arch.lifecycle:common:1.0.0
| | | | \--- android.arch.core:common:1.0.0
| | | +--- com.android.support:support-media-compat:26.1.0
| | | | +--- com.android.support:support-annotations:26.1.0
| | | | \--- com.android.support:support-compat:26.1.0 (*)
| | | +--- com.android.support:support-core-utils:26.1.0
| | | | +--- com.android.support:support-annotations:26.1.0
| | | | \--- com.android.support:support-compat:26.1.0 (*)
| | | +--- com.android.support:support-core-ui:26.1.0
| | | | +--- com.android.support:support-annotations:26.1.0
| | | | \--- com.android.support:support-compat:26.1.0 (*)
| | | \--- com.android.support:support-fragment:26.1.0
| | | +--- com.android.support:support-compat:26.1.0 (*)
| | | +--- com.android.support:support-core-ui:26.1.0 (*)
| | | \--- com.android.support:support-core-utils:26.1.0 (*)
| | \--- com.google.android.gms:play-services-basement-license:11.6.0
| +--- com.google.firebase:firebase-common:11.6.0
| | +--- com.google.android.gms:play-services-basement:11.6.0 (*)
| | +--- com.google.android.gms:play-services-tasks:11.6.0
| | | +--- com.google.android.gms:play-services-basement:11.6.0 (*)
| | | \--- com.google.android.gms:play-services-tasks-license:11.6.0
| | \--- com.google.firebase:firebase-common-license:11.6.0
| +--- com.google.firebase:firebase-analytics-impl:11.6.0
| | +--- com.google.android.gms:play-services-basement:11.6.0 (*)
| | +--- com.google.firebase:firebase-iid:11.6.0
| | | +--- com.google.android.gms:play-services-basement:11.6.0 (*)
| | | +--- com.google.firebase:firebase-common:11.6.0 (*)
| | | +--- com.google.android.gms:play-services-tasks:11.6.0 (*)
| | | \--- com.google.firebase:firebase-iid-license:11.6.0
| | +--- com.google.firebase:firebase-common:11.6.0 (*)
| | +--- com.google.android.gms:play-services-tasks:11.6.0 (*)
| | \--- com.google.firebase:firebase-analytics-impl-license:11.6.0
| \--- com.google.firebase:firebase-analytics-license:11.6.0
\--- project :common-lib
(.............)
编辑：
应用依赖
dependencies {
implementation project(':common-lib')
}
common-lib依赖
dependencies {
//android firebase
implementation "com.google.firebase:firebase-core:$firebase_version"
implementation "com.google.firebase:firebase-crash:$firebase_version"
implementation "com.google.firebase:firebase-messaging:$firebase_version"
implementation "com.google.firebase:firebase-ads:$firebase_version"
//android support
implementation "com.android.support:appcompat-v7:$support_version"
implementation "com.android.support:design:$support_version"
implementation "com.android.support:cardview-v7:$support_version"
implementation "com.android.support:percent:$support_version"
//others
implementation 'com.google.code.gson:gson:2.8.0'
implementation 'com.hannesdorfmann:adapterdelegates3:3.0.1'
implementation 'net.danlew:android.joda:2.9.9'
implementation 'org.ocpsoft.prettytime:prettytime:4.0.1.Final'
implementation 'com.squareup.picasso:picasso:2.5.2'
implementation 'com.github.simbiose:Encryption:2.0.1'
//server
implementation files('libs/xxx.jar')
implementation files('libs/yyy.jar')
implementation files('libs/zzz.jar')
//tests
testImplementation 'junit:junit:4.12'
}
版本：
ext {
firebase_version = '11.6.0'
support_version = '26.1.0'
}
答案 0 :(得分：36)
以前，您似乎隐含地依赖于common-lib模块将Firebase SDK导出到您的应用模块。现在你已经改变了＆＃34;编译＆＃34;到＆＃34;实施＆＃34;，您不再导出这些SDK。所以，现在发生的事情是：google-services插件正在将firebase-core的v9.0.0添加到你的应用模块中，因为它不再在应用模块的可见类路径中显示它。
您应该能够通过以正确的版本手动将firebase-core添加到您的应用模块来解决此问题。或者，您可以通过切换到＆＃34; api＆＃34;继续将Firebase SDK从库模块导出到您的应用模块。依赖而不是＆＃34;实现＆＃34;依赖性。
答案 1 :(得分：5)
这对我有用：
将以下代码添加到您的构建脚本
中subprojects {
project.configurations.all {
resolutionStrategy.eachDependency { details ->
if (details.requested.group == 'com.android.support'
&& !details.requested.name.contains('multidex') ) {
details.useVersion "version which should be used - in your case 11.6.0"
}
}
}
}
最诚挚的问候，
EDDI
答案 2 :(得分：1)
在顶级gradle文件中更改google-services的版本已为我解决了此问题。似乎旧版本会间接注入firebase-core版本，而更新firebase版本会明显地引起冲突
classpath 'com.google.gms:google-services:4.0.2' // Just updated the version here.
答案 3 :(得分：0)
subprojects {
project.configurations.all {
resolutionStrategy.eachDependency { details ->
if (details.requested.group == 'com.android.support'
&& !details.requested.name.contains('multidex') ) {
details.useVersion "26.1.0"
}
}
}
}
将此代码放入您的项目gradle中
答案 4 :(得分：0)
我将compileSdkVersion和targetSdkVersion升级到28，我也遇到了同样的错误。
我将app.gradle中的所有依赖项版本升级到28.0.0，并将项目.gradle文件中的com.android.tools.build:gradle升级到3.3.2
即类路径'com.android.tools.build:gradle:3.3.2'
此项目成功同步后