在使用浓缩咖啡进行测试时，如何在Android上的NavigationView中单击菜单项？

如何使用Espresso在设计库的NavigationView中单击菜单项？它可以在较大的设备上正常工作，整个菜单可见，但在横向或较小的设备上，我的菜单底部不在屏幕上，我无法找到滚动/滑动到这些菜单项的方法，以便单击它们

电话：

onView(withText(R.string.contact_us)).perform(scrollTo()).check(matches(isDisplayed())).perform(click());

生成以下内容：

onView(isRoot()).perform(CustomViewActions.swipeForTextToBeVisible(getActivity().getString(R.string.contact_us),2000, getActivity().findViewById(R.id.navigation_view)));

原因：java.lang.RuntimeException:将不执行操作 因为目标视图与以下一项或多项不匹配 约束：（视图具有有效可见性=可见且为子体） 是可从类中赋值的：类android.widget.ScrollView还是 可从类分配：类android.widget.HorizontalScrollView） 目标视图：“NavigationMenuItemView{id=-1，可见性=可见， 宽度=888，高度=144，焦距=false，焦距=false， 窗口焦点为真，可点击为假，已启用为真， 聚焦=假，聚焦=假，布局请求=假， 已选择=false，请求根布局=false， 输入连接=错误，x=0.0，y=1653.0，文本=联系我们， 输入类型=0，输入法目标=false，有链接=false}”

NavigationView继承自FrameLayout，正在进行画布移动以滚动。

我尝试编写一个customViewAction，使用下面的操作缓慢滚动屏幕，并检查菜单项是否可见，如果没有，则继续滚动，但我无法使其工作

CoordinatesProvider coordinatesProvider = new CoordinatesProvider() {
        public float[] calculateCoordinates(View view) {
            float[] xy = GeneralLocation.BOTTOM_CENTER.calculateCoordinates(view);
            xy[0] += 0.0F * (float)view.getWidth();
            xy[1] += -0.083F * (float)view.getHeight();
            return xy;
        }
    };

onView(withId(R.id.navigation_view)).perform(new GeneralSwipeAction(Swipe.SLOW,
                             coordinatesProvider, GeneralLocation.TOP_CENTER, Press.FINGER));

onView(withText(R.string.contact_us)).check(matches(isDisplayed())).perform(click());

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有人知道如何在浓缩咖啡上测试navigationView了吗？我很确定customViewAction背后的逻辑会起作用，但我无法让它起作用。

我想出来了，我使用了自定义viewAction

CoordinatesProvider coordinatesProvider = new CoordinatesProvider() {
        public float[] calculateCoordinates(View view) {
            float[] xy = GeneralLocation.BOTTOM_CENTER.calculateCoordinates(view);
            xy[0] += 0.0F * (float)view.getWidth();
            xy[1] += -0.083F * (float)view.getHeight();
            return xy;
        }
    };

onView(withId(R.id.navigation_view)).perform(new GeneralSwipeAction(Swipe.SLOW,
                             coordinatesProvider, GeneralLocation.TOP_CENTER, Press.FINGER));

onView(withText(R.string.contact_us)).check(matches(isDisplayed())).perform(click());

public static ViewAction swipeForTextToBeVisible(final String text, final long millis, final View navigationView) {
        return new ViewAction() {
            @Override
            public Matcher<View> getConstraints() {
                return isRoot();
            }

            @Override
            public String getDescription() {
                return "swipe for a specific view with text <" + text + "> during " + millis + " millis.";
            }

            @Override
            public void perform(final UiController uiController, final View view) {
                uiController.loopMainThreadUntilIdle();
                final long startTime = System.currentTimeMillis();
                final long endTime = startTime + millis;
                final Matcher<View> viewMatcher = withText(text);

                do {
                    boolean returnAfterOneMoreSwipe = false; //not sure why I have to do one more swipe but it works

                    for (View child : TreeIterables.breadthFirstViewTraversal(view)) {
                        // found view with required ID
                        if (viewMatcher.matches(child) && child.getVisibility() == View.VISIBLE) {
                            returnAfterOneMoreSwipe = true;
                        }
                    }

                    CoordinatesProvider coordinatesProvider = new CoordinatesProvider() {
                        public float[] calculateCoordinates(View view) {
                            float[] xy = GeneralLocation.BOTTOM_CENTER.calculateCoordinates(view);
                            xy[0] += 0.0F * (float)view.getWidth();
                            xy[1] += -0.083F * (float)view.getHeight();
                            return xy;
                        }
                    };

                    //Below code is c/p from perform in android/support/test/espresso/action/GeneralSwipeAction.class
                    float[] startCoordinates = coordinatesProvider.calculateCoordinates(navigationView);
                    float[] endCoordinates = GeneralLocation.TOP_CENTER.calculateCoordinates(navigationView);
                    float[] precision = Press.FINGER.describePrecision();
                    Swiper.Status status = Swiper.Status.FAILURE;

                    for(int tries = 0; tries < 3 && status != Swiper.Status.SUCCESS; ++tries) {
                        try {
                            status = Swipe.SLOW.sendSwipe(uiController, startCoordinates, endCoordinates, precision);
                        } catch (RuntimeException var9) {
                            throw (new PerformException.Builder()).withActionDescription(this.getDescription()).withViewDescription(HumanReadables.describe(navigationView)).withCause(var9).build();
                        }

                        int duration = ViewConfiguration.getPressedStateDuration();
                        if(duration > 0) {
                            uiController.loopMainThreadForAtLeast((long)duration);
                        }
                    }
                    //End c/p from android/support/test/espresso/action/GeneralSwipeAction.class

                    if (returnAfterOneMoreSwipe) {
                        return;
                    }

                    uiController.loopMainThreadForAtLeast(50);
                }
                while (System.currentTimeMillis() < endTime);

                // timeout happens
                throw new PerformException.Builder()
                        .withActionDescription(this.getDescription())
                        .withViewDescription(HumanReadables.describe(view))
                        .withCause(new TimeoutException())
                        .build();
            }
        };
    }

---

您需要使用意式浓缩咖啡：

import android.support.test.espresso.contrib.DrawerActions;

要打开菜单，可以执行以下操作：

onView(withId(R.id.drawer_layout)).perform(DrawerActions.open());

您可以向下滚动至菜单项并检查是否显示：

onView(withId(R.id.my_menu_item)).perform(scrollTo()).check(matches(isDisplayed()));

并单击菜单项：

onView(withId(R.id.my_menu_item)).perform(click());

---

即使菜单项不可见（在列表中的某个位置），这对我来说也是有效的

---

onView（带id（R.id.nav_视图））。执行（NavigationViewActions.navigateTo（R.id.nav_登录））

就像一个单行魅力！非常感谢。