使用 Espresso 滚动 Recycler 视图

Question

I have a heterogeneous recycler view and I am trying to scroll it to item at position 30. My test is passing but I cannot see the screen actually scrolling.

onView(withId(R.id.content_view))
    .perform(RecyclerViewActions.scrollToPosition(30));

This is what I am doing to scroll.

Answer 1

Use scrollToHolder() :

onView(withId(R.id.recyclerViewId))
    .perform(scrollToHolder(viewHolderMatcher(some_parameter_to_match)));

where viewHolderMatcher(some_parameter_to_match) returns Matcher<RecyclerView.ViewHolder> ie the position of the holder/item in the RecyclerView.

Or only by position:

onView(withId(rvLayoutId))
    .perform(actionOnItemAtPosition(256, scrollTo()));

last one is from here .

Answer 2

您是否尝试过 ViewActions swipeDown ？

Answer 3

Tell it about the ViewHolder.

onView(withId(R.id.recyclerview)).perform(
        RecyclerViewActions.scrollToPosition<RecyclerView.ViewHolder>(
          YOUR_POSITION
        )
      )