关于android studio打开后自动弹出：Error:Execution failed for task ':app:preDebugAndroidTestBuild'

关于android studio打开后自动弹出：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.

这个真的是好难受

解决：单击build，点击rebuild project