I am using android studio 3.1 for some development.
But Its does not showing android option under Tools menu. Whereas Android studio 3.0 doesn\'t h
Probably because the Android options are already there, provided without an additional sub-menu.
Here is what there is under the Tools menu in Android Studio 3.0, all options are same, just grouped together:
EDIT: There are some missing items such as 'Enable ADB Integration', for these you can always use the Help > Find Action... where you type in the search, it will look like this: