다음 접근 방식을 시도하십시오.

    onView(withRecyclerView(R.id.recyclerView)
                    .atPositionOnView(position, R.id.bt_deliver))
                    .perform(click());

    public static RecyclerViewMatcher withRecyclerView(final int recyclerViewId) {
            return new RecyclerViewMatcher(recyclerViewId);
    }

public class RecyclerViewMatcher {
    final int mRecyclerViewId;

    public RecyclerViewMatcher(int recyclerViewId) {
        this.mRecyclerViewId = recyclerViewId;
    }

    public Matcher<View> atPosition(final int position) {
        return atPositionOnView(position, -1);
    }

    public Matcher<View> atPositionOnView(final int position, final int targetViewId) {

        return new TypeSafeMatcher<View>() {
            Resources resources = null;
            View childView;

            public void describeTo(Description description) {
                int id = targetViewId == -1 ? mRecyclerViewId : targetViewId;
                String idDescription = Integer.toString(id);
                if (this.resources != null) {
                    try {
                        idDescription = this.resources.getResourceName(id);
                    } catch (Resources.NotFoundException var4) {
                        idDescription = String.format("%s (resource name not found)", id);
                    }
                }

                description.appendText("with id: " + idDescription);
            }

            public boolean matchesSafely(View view) {

                this.resources = view.getResources();

                if (childView == null) {
                    RecyclerView recyclerView =
                            (RecyclerView) view.getRootView().findViewById(mRecyclerViewId);
                    if (recyclerView != null) {

                        childView = recyclerView.findViewHolderForAdapterPosition(position).itemView;
                    }
                    else {
                        return false;
                    }
                }

                if (targetViewId == -1) {
                    return view == childView;
                } else {
                    View targetView = childView.findViewById(targetViewId);
                    return view == targetView;
                }

            }
        };
    }
}

답변

onView(withId(R.id.recyclerView)).perform(
                RecyclerViewActions.actionOnItemAtPosition<RecyclerView.ViewHolder>(2,click()))

fun performClickOnViewInCell(viewID: Int) = object : ViewAction {
    override fun getConstraints(): org.hamcrest.Matcher<View> = click().constraints
    override fun getDescription() = "Click on a child view with specified id."
    override fun perform(uiController: UiController, view: View) {
        val allChildViews = getAllChildrenBFS(view)
        for (child in allChildViews) {
            if (child.id == viewID) {
                child.callOnClick()
            }
        }
    }
}


private fun  getAllChildrenBFS(v: View): List<View> {
    val visited = ArrayList<View>();
    val unvisited = ArrayList<View>();
    unvisited.add(v);

    while (!unvisited.isEmpty()) {
        val child = unvisited.removeAt(0);
        visited.add(child);
        if (!(child is ViewGroup)) continue;
        val group = child
        val childCount = group.getChildCount();
        for (i in 0 until childCount) { unvisited.add(group.getChildAt(i)) }
    }

    return visited;
}

onView(withId(R.id.recyclerView)).perform(actionOnItemAtPosition<RecyclerView.ViewHolder>(0, getViewFromCell(R.id.cellInnerView) {
            val requestedView = it
}))

fun clickTopicToWeb(id: Int): ViewAction {

        return object : ViewAction {
            override fun getDescription(): String {...}

            override fun getConstraints(): Matcher<View> {...}

            override fun perform(uiController: UiController?, view: View?) {

                view?.findViewById<View>(id)?.apply {

                    //Generalized for OnClickListeners as well
                    if(isEnabled && isClickable && !performClick()) {
                        //Define click event
                        val event: MotionEvent = MotionEvent.obtain(
                          SystemClock.uptimeMillis(),
                          SystemClock.uptimeMillis(),
                          MotionEvent.ACTION_UP,
                          view.x,
                          view.y,
                          0)

                        if(!dispatchTouchEvent(event))
                            throw Exception("Not clicking!")
                    }
                }
            }
        }
    }