Android Studio Flamingo lacks the Legacy Layout Inspector function and cannot view the current Activity solution

After Android Studio was upgraded from 4.0 to Android Studio Flamingo, it was found that the Layout Inspector function could not be used to view the current Activity.

The Layout Inspector of the Flamingo version of Android Studio only provides the function of viewing the page layout, and there is no selection box as shown below:

Solution:
Search for the Legacy Layout Inspector plug-in in File–>Setting–>Plugins, install and restart Android Stuido.

References:
Legacy Layout Inspector plug-in official website.