Question

对于给定的RecyclerView，我可以通过以下方式访问LinearLayout元素：

recyclerView.findViewHolderForAdapterPosition(1)

其中1是RecyclerView中的第二个元素/位置，并返回ViewHolder。

如何访问ViewHolder LinearLayout的子元素？或者有没有办法到达AppCompatTextView元素，以便我可以从该元素中提取文本？

Answer 1

我创建了RecyclerViewMatcher类，然后是代码

＆＃13;

onView(withRecyclerView(R.id.rv_fragment_recipes).atPosition(0))
                .check(matches(isDisplayed()));

        onView(withRecyclerView(R.id.rv_fragment_recipes).atPositionOnView(0, R.id.tv_recipe_name))
                .check(matches(isDisplayed()))
                .check(matches(withText("Nutella Pie")));

        onView(withRecyclerView(R.id.rv_fragment_recipes).atPositionOnView(0, R.id.tv_servings))
                .check(matches(isDisplayed()))
                .check(matches(withText("Servings : 8")));

        onView(withRecyclerView(R.id.rv_fragment_recipes).atPosition(0))
                .perform(click());

＆＃13;

public class RecyclerViewMatcher {
    private final int recyclerViewId;

    public RecyclerViewMatcher(int recyclerViewId) {
        this.recyclerViewId = 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) {
                String idDescription = Integer.toString(recyclerViewId);
                if (this.resources != null) {
                    try {
                        idDescription = this.resources.getResourceName(recyclerViewId);
                    } catch (Resources.NotFoundException var4) {
                        idDescription = String.format("%s (resource name not found)",
                                new Object[] { Integer.valueOf
                                        (recyclerViewId) });
                    }
                }

                description.appendText("with id: " + idDescription);
            }

            public boolean matchesSafely(View view) {

                this.resources = view.getResources();

                if (childView == null) {
                    RecyclerView recyclerView =
                            (RecyclerView) view.getRootView().findViewById(recyclerViewId);
                    if (recyclerView != null && recyclerView.getId() == recyclerViewId) {
                        childView = recyclerView.findViewHolderForAdapterPosition(position).itemView;
                    }
                    else {
                        return false;
                    }
                }

                if (targetViewId == -1) {
                    return view == childView;
                } else {
                    View targetView = childView.findViewById(targetViewId);
                    return view == targetView;
                }

            }
        };
    }
}

＆＃13;

for refernce you can follow this project

如果recyclerView数据不是静态的，则使用IdelingResource

Espresso - 如何访问ViewHolder的子元素

1 个答案: