Espresso: return boolean if view exists

Question

I am trying to check to see if a view is displayed with Espresso. Here is some pseudo code to show what I am trying:

if (!Espresso.onView(withId(R.id.someID)         


        

Answer 1

Why no one mentioned:

onView(withId(R.id.some_view_id)).check(matches(not(doesNotExist())))

just add not before doesNotExist. But if you use this logic a lot it's better to use a custom matcher.