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android – Using Espresso to click view inside RecyclerView item

Posted by: admin March 11, 2020 Leave a comment

Questions:

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.id.recyclerView))
.perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));

But I need to click on a specific view inside that item and not on the item itself.

Thanks in advance.

— edit —

To be more precise: I have a RecyclerView (R.id.recycler_view) which items are CardView (R.id.card_view). Inside each CardView I have four buttons (amongst other things) and I want to click on a specific button (R.id.bt_deliver).

I would like to use the new features of Espresso 2.0, but I’m not sure that is possible.

If not possible, I wanna use something like this (using Thomas Keller code):

onRecyclerItemView(R.id.card_view, ???, withId(R.id.bt_deliver)).perform(click());

but I don’t know what to put on the question marks.

How to&Answers:

You can do it with customize view action.

public class MyViewAction {

    public static ViewAction clickChildViewWithId(final int id) {
        return new ViewAction() {
            @Override
            public Matcher<View> getConstraints() {
                return null;
            }

            @Override
            public String getDescription() {
                return "Click on a child view with specified id.";
            }

            @Override
            public void perform(UiController uiController, View view) {
                View v = view.findViewById(id);
                v.performClick();
            }
        };
    }

}

Then you can click it with

onView(withId(R.id.rv_conference_list)).perform(
            RecyclerViewActions.actionOnItemAtPosition(0, MyViewAction.clickChildViewWithId(R.id. bt_deliver)));

Answer:

Now with android.support.test.espresso.contrib it has become easier:

1)Add test dependency

androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.0') {
    exclude group: 'com.android.support', module: 'appcompat'
    exclude group: 'com.android.support', module: 'support-v4'
    exclude module: 'recyclerview-v7'
}

*exclude 3 modules, because very likely you already have it

2) Then do something like

onView(withId(R.id.recycler_grid))
            .perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));

Or

onView(withId(R.id.recyclerView))
  .perform(RecyclerViewActions.actionOnItem(
            hasDescendant(withText("whatever")), click()));

Or

onView(withId(R.id.recycler_linear))
            .check(matches(hasDescendant(withText("whatever"))));

Answer:

Try next approach:

    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;
                }

            }
        };
    }
}

Answer:

Here is, how I resolved issue in kotlin:

fun clickOnViewChild(viewId: Int) = object : ViewAction {
    override fun getConstraints() = null

    override fun getDescription() = "Click on a child view with specified id."

    override fun perform(uiController: UiController, view: View) = click().perform(uiController, view.findViewById<View>(viewId))
}

and then

onView(withId(R.id.recyclerView)).perform(RecyclerViewActions.actionOnItemAtPosition<RecyclerView.ViewHolder>(position, clickOnViewChild(R.id.viewToClickInTheRow)))

Answer:

You can click on 3rd item of recyclerView Like this:

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

Do not forget to provide the ViewHolder type so that inference does not fail.

Answer:

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<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;
}

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

onView(withId(R.id.recyclerView)).perform(actionOnItemAtPosition<RecyclerView.ViewHolder>(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.

Answer:

First give your buttons unique contentDescriptions, i.e. “delivery button row 5”.

<button android:contentDescription=".." />

Then scroll to row:

onView(withId(R.id.recycler_view)).perform(RecyclerViewActions.scrollToPosition(5));

Then select the view based on contentDescription.

onView(withContentDescription("delivery button row 5")).perform(click());

Content Description is a great way to use Espresso’s onView and make your app more accessible.