I newly started using Ubuntu 18.0 LTS this week, switching from Windows, and wanted to install Android Studio and Flutter back. I followed all the steps as said to install A
I had this issue after installed on my KUbuntu.
You need to open AndroidStudio then go to Tools -> SDK Manager then go to SDK Tools tab, uncheck the option Hide Obsolete Packages
You will see the option of Android SDK Tools (Obsolete), check the option and continue the process download and installation.