Android 引入库后appcompat版本冲突

Android工程在引入某个库之后会报下面的错误，版本混乱问题

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 27.1.1, 27.1.0, 27.0.1. Examples 
include com.android.support:animated-vector-drawable:27.1.1 and com.android.support:exifinterface:27.1.0 more... (Ctrl+F1)

There are some combinations of libraries, or tools and libraries, that are incompatible, or can lead to bugs. One such incompatibility is compiling with a version of the Android support libraries that is not the latest version (or in particular, a version lower than your targetSdkVersion).

你可以通过gradlew assembleDebug –info编译打印详细信息查看具体是哪个地方引起的，然后逐个解决，找最新的库，写exclude配置，或者自己编译，或者删除class文件重新打包，当然也有一劳永逸的办法，就是在项目的gradle文件下的allprojects里面配置如下规则，统一使用某个版本

subprojects {
    project.configurations.all {
        resolutionStrategy.eachDependency { details ->
            if (details.requested.group == 'com.android.support'
                    && !details.requested.name.contains('multidex') ) {
                details.useVersion "27.1.1"
            }
        }
    }
}