How to Click on an Item Inside a Recyclerview in Espresso

Using Espresso to click view inside RecyclerView item

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)));

How to click on a button within a recycler view item using espresso?

Have a look at the following stackoverflow question:
It creates a ViewAction that clicks a view object, identified by id, at a specific position in the recyclerView.

Using Espresso to click view inside RecyclerView item

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