小编Jor*_*Gil的帖子

我有CoordinatorLayout一个Toolbar和TabLayout里面的AppBarLayout.另外,我有一个ViewPager在里面,CoordinatorLayout但在外面ViewPager.

问题是ViewPager's高度大于实际可用的高度,导致我Fragment被切割的一些视图.

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/lightGray"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar2"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:popupTheme="@style/AppTheme.PopupOverlay"
            app:layout_scrollFlags="scroll|enterAlways"/>

        <android.support.design.widget.TabLayout
            android:id="@+id/tabLayout"
            android:scrollbars="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fillViewport="false"/>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

</android.support.design.widget.CoordinatorLayout>

这就是我的意思,当我说它ViewPager有错误的高度.

我将Android项目迁移到AndroidX库，但在运行Android测试时遇到问题。

我可以毫无问题地编译和运行该应用程序，我可以./gradlew assembleDebugUnitTest无问题地运行，但无法运行./gradlew assembleDebugAndroidTest。

我尝试清理/重建并使缓存无效并重新启动，但这也不起作用。

我在minSdk = 21，compileSdk和targetSdk = 28以及buildTools = 28.0.3上

这是完整的堆栈跟踪，没有发现有用的东西：

> Task :app:transformClassesWithDexBuilderForDebugAndroidTest FAILED
java.lang.RuntimeException: java.lang.RuntimeException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:593)
        at java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:677)
        at java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:720)
        at com.android.ide.common.internal.WaitableExecutor.waitForTasksWithQuickFail(WaitableExecutor.java:146)
        at com.android.build.gradle.internal.transforms.DesugarIncrementalTransformHelper.getInitalGraphData(DesugarIncrementalTransformHelper.java:162)
        at com.android.build.gradle.internal.transforms.DesugarIncrementalTransformHelper.makeDesugaringGraph(DesugarIncrementalTransformHelper.java:130)
        at com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:160)
        at com.android.build.gradle.internal.transforms.DesugarIncrementalTransformHelper.getDependenciesPaths(DesugarIncrementalTransformHelper.java:231)
        at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.getD8DesugaringCacheInfo(DexArchiveBuilderTransform.java:461)
        at com.android.build.gradle.internal.transforms.DexArchiveBuilderTransform.transform(DexArchiveBuilderTransform.java:375)
        at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:239)
        at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:235)
        at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
        at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:230)
        at sun.reflect.GeneratedMethodAccessor1040.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:50)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:131)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:317)
        at …

我正在尝试使用androidx测试库的新FragmentScenario API，但是测试无法像这样启动片段场景：

fragmentScenario = launchFragmentInContainer<MyFragment>(args)

stacktrace是：

java.lang.NoSuchMethodError: androidx.fragment.app.FragmentManager.getFragmentFactory()Landroidx/fragment/app/FragmentFactory;

    at androidx.fragment.app.testing.FragmentScenario$1.perform(FragmentScenario.java:178)
    at androidx.fragment.app.testing.FragmentScenario$1.perform(FragmentScenario.java:171)
    at androidx.test.core.app.ActivityScenario.lambda$onActivity$0$ActivityScenario(ActivityScenario.java:478)
    at androidx.test.core.app.ActivityScenario$$Lambda$0.run(Unknown Source)
    at org.robolectric.android.fakes.RoboMonitoringInstrumentation.runOnMainSync(RoboMonitoringInstrumentation.java:53)
    at androidx.test.core.app.ActivityScenario.onActivity(ActivityScenario.java:471)
    at androidx.fragment.app.testing.FragmentScenario.internalLaunch(FragmentScenario.java:170)
    at androidx.fragment.app.testing.FragmentScenario.launchInContainer(FragmentScenario.java:160)
    at com.domain.myapp.ui.pck.pkg.MyFragmentTest.setup(MyFragmentTest.kt:656)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)

如果我去FragmentManager类（androidx.fragment.app FragmentManager），则没有getFragmentFactory方法，而FragmentScenario.java类（包androidx.fragment.app.testing）清楚地表明该方法不存在：

我猜我的依赖项配置不正确，这是我的app / build.gradle文件：

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.3'
    defaultConfig {
        applicationId "com.domain.app"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode appVersionCode
        versionName appVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables {
            useSupportLibrary true
        }
    }
    aaptOptions {
        additionalParameters "--no-version-vectors"
    }
    buildTypes {
        debug {
            applicationIdSuffix ".debug"
        }
    }
    compileOptions …