启用Java 8时，Android Studio Ui测试给出错误

Question

我在Android Studio 3.2.1和Android Studio 3.4上尝试过，如果我在gradle文件中启用Java 8并运行espresso测试，则会收到以下错误消息：

java.lang.RuntimeExceptionCause: java.lang.RuntimeException

经过多次试验，我发现从gradle文件中删除Java8支持可解决此问题。

但是Java 8对于我的项目很重要。您有更好的解决方案吗？

这是我的代码：

import static androidx.test.espresso.action.ViewActions.click;

import static androidx.test.espresso.assertion.ViewAssertions.matches;

import static androidx.test.espresso.matcher.ViewMatchers.withId;

import static androidx.test.espresso.matcher.ViewMatchers.withText;

import androidx.test.espresso.Espresso;

import androidx.test.ext.junit.runners.AndroidJUnit4;

import androidx.test.filters.LargeTest;

import androidx.test.rule.ActivityTestRule;

import com.dubizzle.workshopsample.R;

import org.junit.Rule;

import org.junit.Test;

import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)

@LargeTest

public class MainActivityUiTest {

  @Rule

  public ActivityTestRule<MainActivity> mActivityRule

      = new ActivityTestRule<>(MainActivity.class);

  @Test

  public void testShareButtonClickedUi() {

    Espresso.onView(withId(R.id.txtStatus))

        .check(matches(withText("Hello World!")));

    Espresso.onView(withId(R.id.btnShare)).perform(click());

    Espresso.onView(withId(R.id.txtStatus))

        .check(matches(withText("onShareButtonClicked")));

  }

}