Error:Execution failed for task ‘:app:preDebugAndroidTestBuild‘. ＞ Conflict with dependency ‘com.and

Error:Execution failed for task ':app:preDebugAndroidTestBuild'.
> Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (26.1.0) and test app (27.1.1) differ. See https://d.android.com/r/tools/test-apk-dependency-conflicts.html for details.

由于 新建项目时 下面的依赖

出现了依赖包冲突，



可以 注释掉这两个依赖  或者加入下面的代码

dependencies {
    ...
    androidTestCompile('com.android.support:support-annotations:26.1.0') {
        force = true
    }
    ...
    
}

统一使用26.1.0版本