Difference between specifying a view as isRoot() & withId-CodePudding

I want to know the difference in specifying a view in different ways

onView(withId(R.id.btnAuthLogin)).perform(click());

onView(isRoot()).perform(waitId(R.id.btnAuthLogin, 1000));

It's not the delay thing that i want to know

What happens when we specify isRoot() rather than specifying withID.

Hope there is no confusion.

CodePudding user response：

isRoot() returns the root view of your layout, such as the constraint or relative layout hosting your views.

withId() return the view with a matching ID from the layout, or throws an error showing the structure of your view hierarchy

You set a views Id in XML using android:id="@ id/your_id_here"