Using Espresso to click view inside RecyclerView item

Question

How can I use Espresso to click a specific view inside a RecyclerView item? I know I can click the item at position 0 using:

onView(withId(R.i

Answer 1

All of the answers above didn't work for me so I have built a new method that searches all of the views inside a cell to return the view with the ID requested. It requires two methods (could be combined into one):

fun performClickOnViewInCell(viewID: Int) = object : ViewAction {
    override fun getConstraints(): org.hamcrest.Matcher = 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 {
    val visited = ArrayList();
    val unvisited = ArrayList();
    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;
}

Then final you can use this on Recycler View by doing the following:

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

You could use a callback to return the view if you want to do something else with it, or just build out 3-4 different versions of this to do any other tasks.