Firebase引用版本冲突解决：Android(安卓)dependency 'com.google.android.gms:play-services-basement' has

前两天在RN项目中集成原生的firebase，之后报错插件版本冲突，报错信息如下：

What went wrong:
Execution failed for task ‘:app:preDebugBuild’.
Android dependency ‘com.google.android.gms:play-services-basement’ has different version for the compile (16.0.1) and runtime (16.1.0) classpath. You should manually set the same version via DependencyResolution
Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
Get more help at https://help.gradle.org
###尝试

这个问题可是折磨了我大半天，按照网上搜索的解决方式各种尝试

1. 方法一：

在项目的build.gradle中加入

allprojects {subprojects {project.configurations.all {resolutionStrategy.eachDependency { details ->if (details.requested.group == 'com.android.support'&& !details.requested.name.contains('multidex') ) {details.useVersion "16.1.0"}}}}}

2. 方法二：

classpath 'com.google.gms:google-services:4.0.2' // Just updated the version here.

3. 方法三：

各个module的dependencies里的compile改为implementation
然而，并没有什么卵用

解决方法

之后静下心来好好思考了下，依赖版本冲突，肯定是存在重复依赖的问题。从这个思路着手：

第一步：

将firebase的依赖版本更新到最新版，这样能尽可能的降低版本冲突的概率；
参考firebase插件的各个发布版本
https://firebase.google.com/support/release-notes/android#20180523

第二步：

去除依赖冲突参考 https://blog.csdn.net/yyo201/article/details/80570741
在Teminal 里面输入 gradlew app:dependencies 回车之后等一会儿就可以查看到整个项目的依赖树结构了。

在依赖树结构里搜索出现版本冲突的module，即play-services-basement，
上面应该可以看出来 271行到273行firebase-core引用的play-services-basement版本是16.0.1，
432行-436行看到react-native-device-info引用的play-services-basement版本变成了16.1.0，
才导致了play-services-basement引用版本冲突。
那我们去除重复引用play-services-basement不就可以了么。
在引用firebase-core的moudle的build.gradle文件中exclude 掉play-services-basement，

implementation ('com.google.firebase:firebase-core:16.0.6') { // 所加的第三方框架        exclude group: 'com.google.android.gms',module: 'play-services-basement'     // 加载时排除框架中的design包    }

现在编译，就能成功通过了。

其他可行方法

版本冲突

在同一个配置下（例如androidTestCompile），某个模块的不同版本同时被依赖时，默认使用最新版，gradle同步时不会报错。例如下面的hamcrest-core和runner。

dependencies {   androidTestCompile('com.android.support.test:runner:0.4')   androidTestCompile('com.android.support.test:rules:0.2')   androidTestCompile('com.android.support.test.espresso:espresso-core:2.1')}+--- com.android.support.test:runner:0.4|    +--- com.android.support:support-annotations:23.0.1|    +--- junit:junit:4.12|    |    \--- org.hamcrest:hamcrest-core:1.3|    \--- com.android.support.test:exposed-instrumentation-api-publish:0.4+--- com.android.support.test:rules:0.2|    \--- com.android.support.test:runner:0.2 -> 0.4 (*)\--- com.android.support.test.espresso:espresso-core:2.1     +--- com.android.support.test:rules:0.2 (*)     +--- com.squareup:javawriter:2.1.1     +--- org.hamcrest:hamcrest-integration:1.1     |    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3     +--- com.android.support.test.espresso:espresso-idling-resource:2.1     +--- org.hamcrest:hamcrest-library:1.1     |    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3     +--- javax.inject:javax.inject:1     +--- com.google.code.findbugs:jsr305:2.0.1     +--- com.android.support.test:runner:0.2 -> 0.4 (*)     +--- javax.annotation:javax.annotation-api:1.2     \--- org.hamcrest:hamcrest-core:1.1 -> 1.3

1、Force

force强制设置某个模块的版本。

 configurations.all {       resolutionStrategy {           force 'org.hamcrest:hamcrest-core:1.3'       }    }    dependencies {       androidTestCompile('com.android.support.test:runner:0.2')       androidTestCompile('com.android.support.test:rules:0.2')       androidTestCompile('com.android.support.test.espresso:espresso-core:2.1')    }

可以看到，原本对hamcrest-core 1.1的依赖，全部变成了1.3。

+--- com.android.support.test:runner:0.2|    +--- junit:junit-dep:4.10|    |    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3|    +--- com.android.support.test:exposed-instrumentation-api-publish:0.2|    \--- com.android.support:support-annotations:22.0.0+--- com.android.support.test:rules:0.2|    \--- com.android.support.test:runner:0.2 (*)\--- com.android.support.test.espresso:espresso-core:2.1     +--- com.android.support.test:rules:0.2 (*)     +--- com.squareup:javawriter:2.1.1     +--- org.hamcrest:hamcrest-integration:1.1     |    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3     +--- com.android.support.test.espresso:espresso-idling-resource:2.1     +--- org.hamcrest:hamcrest-library:1.1     |    \--- org.hamcrest:hamcrest-core:1.1 -> 1.3     +--- javax.inject:javax.inject:1     +--- com.google.code.findbugs:jsr305:2.0.1     +--- com.android.support.test:runner:0.2 (*)     +--- javax.annotation:javax.annotation-api:1.2     \--- org.hamcrest:hamcrest-core:1.1 -> 1.3

2、Exclude

Exclude可以设置不编译指定的模块

configurations {   all*.exclude group: 'org.hamcrest', module: 'hamcrest-core'}dependencies {   androidTestCompile('com.android.support.test:runner:0.2')   androidTestCompile('com.android.support.test:rules:0.2')   androidTestCompile('com.android.support.test.espresso:espresso-core:2.1')}+--- com.android.support.test:runner:0.2|    +--- junit:junit-dep:4.10|    +--- com.android.support.test:exposed-instrumentation-api-publish:0.2|    \--- com.android.support:support-annotations:22.0.0+--- com.android.support.test:rules:0.2|    \--- com.android.support.test:runner:0.2 (*)\--- com.android.support.test.espresso:espresso-core:2.1     +--- com.android.support.test:rules:0.2 (*)     +--- com.squareup:javawriter:2.1.1     +--- org.hamcrest:hamcrest-integration:1.1     +--- com.android.support.test.espresso:espresso-idling-resource:2.1     +--- org.hamcrest:hamcrest-library:1.1     +--- javax.inject:javax.inject:1     +--- com.google.code.findbugs:jsr305:2.0.1     +--- com.android.support.test:runner:0.2 (*)     \--- javax.annotation:javax.annotation-api:1.2

3、单独使用group或module参数

exclude后的参数有group和module，可以分别单独使用，会排除所有匹配项。例如下面的脚本匹配了所有的group为’com.android.support.test’的模块。

configurations {   all*.exclude group: 'com.android.support.test'}dependencies {   androidTestCompile('com.android.support.test:runner:0.2')   androidTestCompile('com.android.support.test:rules:0.2')   androidTestCompile('com.android.support.test.espresso:espresso-core:2.1')}  -- com.android.support.test.espresso:espresso-core:2.1         +--- com.squareup:javawriter:2.1.1         +--- org.hamcrest:hamcrest-integration:1.1         |    \--- org.hamcrest:hamcrest-core:1.1         +--- com.android.support.test.espresso:espresso-idling-resource:2.1         +--- org.hamcrest:hamcrest-library:1.1         |    \--- org.hamcrest:hamcrest-core:1.1         +--- javax.inject:javax.inject:1         +--- com.google.code.findbugs:jsr305:2.0.1         +--- javax.annotation:javax.annotation-api:1.2         \--- org.hamcrest:hamcrest-core:1.1

单独给某个模块指定exclude

dependencies {   androidTestCompile('com.android.support.test:runner:0.2')   androidTestCompile('com.android.support.test:rules:0.2')   androidTestCompile('com.android.support.test.espresso:espresso-core:2.1') {       exclude group: 'org.hamcrest'   }}+--- com.android.support.test:runner:0.2|    +--- junit:junit-dep:4.10|    |    \--- org.hamcrest:hamcrest-core:1.1|    +--- com.android.support.test:exposed-instrumentation-api-publish:0.2|    \--- com.android.support:support-annotations:22.0.0+--- com.android.support.test:rules:0.2|    \--- com.android.support.test:runner:0.2 (*)\--- com.android.support.test.espresso:espresso-core:2.1     +--- com.android.support.test:rules:0.2 (*)     +--- com.squareup:javawriter:2.1.1     +--- com.android.support.test.espresso:espresso-idling-resource:2.1     +--- javax.inject:javax.inject:1     +--- com.google.code.findbugs:jsr305:2.0.1     +--- com.android.support.test:runner:0.2 (*)     \--- javax.annotation:javax.annotation-api:1.2

不同配置下的版本冲突
同样的配置下的版本冲突，会自动使用最新版；而不同配置下的版本冲突，gradle同步时会直接报错。可使用exclude、force解决冲突。

例如compile ‘com.android.support:appcompat-v7:23.1.1’，和androidTestCompile ‘com.android.support.test.espresso:espresso-core:2.1’，所依赖的com.android.support:support-annotations版本不同，就会导致冲突。

dependencies {   compile 'com.android.support:appcompat-v7:23.1.1'   androidTestCompile('com.android.support.test:runner:0.2')   androidTestCompile('com.android.support.test:rules:0.2')   androidTestCompile('com.android.support.test.espresso:espresso-core:2.1')}

gradle同步时会提示

Warning:Conflict with dependency 'com.android.support:support-annotations'. Resolved versions for app and test app differ.

执行dependencies会提示

FAILURE: Build failed with an exception.* What went wrong:A problem occurred configuring project ':app'.> Conflict with dependency 'com.android.support:support-annotations'. Resolved versions for app and test app differ.* Try:Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.BUILD FAILED

4、不兼容

虽然可以通过force、exclude等方式避免依赖项版本冲突，使得grade同步成功，但是并不能代表编译时没有问题。由于不同版本可能不完全兼容，于是会出现各种奇怪的报错。已知的解决思路是更改包的版本、尝试强制使用不同版本的依赖项，找到可兼容的依赖组合。

参考：http://www.paincker.com/gradle-dependencies