How to run test cases for multiple activities

Hello Guys,

I am new to espresso and i am able to run single test cases for an activity successfully what if i have multiple activities to test.
The espresso is unable to find the view getting below mentioned error:

`androidx.test.espresso.NoMatchingViewException: No views in hierarchy found matching: with id: com.fourtek.phonebook:id/llListItem`

The issue names an Espresso test, multiple activities, and the llListItem view ID but no source file or test path. Start by reproducing the NoMatchingViewException and inspect the view hierarchy for the activity under test; done means establishing why llListItem is unavailable and documenting or correcting the test setup.

Written by the indexing model from the issue text.