在Build APK(s)时报错如下：

Unable to delete directory 'F:\AndriodStudioProjects\EDM\app\build\outputs\apk\debug'
  Failed to delete some children. This might happen because a process has files open or has its working directory set in the target directory.
  - F:\AndriodStudioProjects\EDM\app\build\outputs\apk\debug\app-debug.apk

  解决：关闭\…\app\build\outputs\apk\debug文件夹。