Espresso recycler view item button click

click_on_button.java

onView(withId(R.id.recycler_view_id))
  .perform(
    RecyclerViewActions.actionOnItemAtPosition(
      itemPosition, 
      new ViewAction() {
        @Override
          public Matcher<View> getConstraints() {
            return null;
          }
  
          @Override
          public String getDescription() {
            return "Click on specific button";
          }
  
          @Override
          public void perform(UiController uiController, View view) {
            View button = view.findViewById(R.id.button_id);
            // Maybe check for null
            button.performClick();
          }
      })
    );

nice, thanks!