In Espresso, how to avoid AmbiguousViewMatcherException when multiple views match

Question

Having gridView which has some images. The gridView\'s cell comes out from same predefined layout, which has same id and desc.

R.id.item_image == 2131

Answer 1

You can simply make NthMatcher like:

   class NthMatcher internal constructor(private val id: Int, private val n: Int) : TypeSafeMatcher(View::class.java) {
        companion object {
            var matchCount: Int = 0
        }
        init {
            var matchCount = 0
        }
        private var resources: Resources? = null
        override fun describeTo(description: Description) {
            var idDescription = Integer.toString(id)
            if (resources != null) {
                try {
                    idDescription = resources!!.getResourceName(id)
                } catch (e: Resources.NotFoundException) {
                    // No big deal, will just use the int value.
                    idDescription = String.format("%s (resource name not found)", id)
                }

            }
            description.appendText("with id: $idDescription")
        }

        public override fun matchesSafely(view: View): Boolean {
            resources = view.resources
            if (id == view.id) {
                matchCount++
                if(matchCount == n) {
                    return true
                }
            }
            return false
        }
    }

Declare like this:

fun withNthId(resId: Int, n: Int) = CustomMatchers.NthMatcher(resId, n)

And use like this:

onView(withNthId(R.id.textview, 1)).perform(click())