How to find button in dialog espresso

Issue

I have this popup. How can I press on QUIT button ?

I use string like this:

onView(withId(android.R.id.button1)).perform((click()));  

enter image description here

Solution

Try:

onView(withText("QUIT"))
    .inRoot(isDialog())
    .check(matches(isDisplayed()))
    .perform(click());

Answered By - jeprubio