Android::android.support.test.espresso.NoMatchingViewException：在层次结构中没有找到匹配的视图

Question

这是我第一次运行浓缩咖啡，我被这个问题困住了

问题:: android.support.test.espresso.NoMatchingViewException: 层次结构中没有找到匹配的视图: (id: edu.gatech.seclass.sdpguessit:id/login_page_username_field 和 text: is "Enter Username" and Child at position 1 in parent 位于 parent 中位置 0 的 Child，id 为：16908290，并显示在屏幕上给用户）

这是我的代码如下：

package edu.gatech.seclass.sdpguessit.ui;


import android.support.test.espresso.DataInteraction;
import android.support.test.espresso.ViewInteraction;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import android.test.suitebuilder.annotation.LargeTest;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;

import static android.support.test.InstrumentationRegistry.getInstrumentation;
import static android.support.test.espresso.Espresso.onData;
import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.Espresso.pressBack;
import static android.support.test.espresso.Espresso.openActionBarOverflowOrOptionsMenu;
import static android.support.test.espresso.action.ViewActions.*;
import static android.support.test.espresso.assertion.ViewAssertions.*;
import static android.support.test.espresso.matcher.ViewMatchers.*;

import edu.gatech.seclass.sdpguessit.R;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
import org.hamcrest.core.IsInstanceOf;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static org.hamcrest.Matchers.allOf;
import static org.hamcrest.Matchers.anything;
import static org.hamcrest.Matchers.is;

@LargeTest
@RunWith(AndroidJUnit4.class)
public class LoginActivityTest {

    @Rule
    public ActivityTestRule<LoginActivity> mActivityTestRule = new ActivityTestRule<>(LoginActivity.class);

    @Test
    public void loginActivityTest() {
        ViewInteraction editText = onView(
                allOf(withId(R.id.login_page_username_field), withText("Enter Username"),
                        childAtPosition(
                                childAtPosition(
                                        withId(android.R.id.content),
                                        0),
                                1),
                        isDisplayed()));
        editText.check(matches(withText("Enter Username")));

        ViewInteraction button = onView(
                allOf(withId(R.id.login_button),
                        childAtPosition(
                                childAtPosition(
                                        withId(android.R.id.content),
                                        0),
                                2),
                        isDisplayed()));
        button.check(matches(isDisplayed()));

        ViewInteraction button2 = onView(
                allOf(withId(R.id.create_player_button),
                        childAtPosition(
                                childAtPosition(
                                        withId(android.R.id.content),
                                        0),
                                3),
                        isDisplayed()));
        button2.check(matches(isDisplayed()));

    }

    private static Matcher<View> childAtPosition(
            final Matcher<View> parentMatcher, final int position) {

        return new TypeSafeMatcher<View>() {
            @Override
            public void describeTo(Description description) {
                description.appendText("Child at position " + position + " in parent ");
                parentMatcher.describeTo(description);
            }

            @Override
            public boolean matchesSafely(View view) {
                ViewParent parent = view.getParent();
                return parent instanceof ViewGroup && parentMatcher.matches(parent)
                        && view.equals(((ViewGroup) parent).getChildAt(position));`enter code here`
            }
        };
    }
}

我该如何解决这个问题？

Answer 1

我对浮动操作按钮的 Id 有同样的问题，它显示在我的应用程序中，但不在 Espresso 层次结构中。

我结束了使用 Android Studio 中提供的espresso test recorder （点击Run ，然后Record Espresso Test ，然后按照您希望测试的方式在您的应用程序中导航...）然后您可以复制结果。

它缺乏优雅，但它确实有效。

Answer 2

试试这个：

onView(withId(R.id.login_page_username_field)).check(matches(withText("Enter Username"));