By the command Reanalyze sources the Google Dart Editor always reanalyzes all opened projects for the editing but not only the current active project.
Reanalyzing all the opened project can take a long time, especially if of open projects, there are about a dozen.
Is there the way to reanalyze only current active project in Google Dart Editor?
No, but you can exclude projects and folders with
Don't analyzefrom the context menu.