Question

每个支持设计小部件都出现错误。像recyclerview，协调器布局等。每次，我添加一个正在显示的支持设计小部件

java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener

在布局问题部分。我正在使用api 28.0.0-rc01，gradle 4.4 android 3.1.4。这是我的build.gradle（应用程序）文件

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.android.test5test"
        minSdkVersion 23
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    buildToolsVersion '28.0.2'
    productFlavors {
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.android.support:design:28.0.0-rc01'
    implementation 'com.android.support:cardview-v7:28.0.0-rc01'
    implementation 'com.android.support:recyclerview-v7:28.0.0-rc01'
}

这是我的布局文件

<LinearLayout
    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:orientation="vertical">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.design.widget.TabLayout
            android:id="@+id/work_tab"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabIndicatorHeight="5dp"
            app:tabTextColor="@color/white"
            app:tabSelectedTextColor="@color/colorAccent"
            app:tabGravity="fill"
            app:tabMode="fixed" />

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

</LinearLayout>

这是错误的堆栈跟踪

java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener
    at org.jetbrains.android.uipreview.ModuleClassLoader.load(ModuleClassLoader.java:180)
    at com.android.tools.idea.rendering.RenderClassLoader.findClass(RenderClassLoader.java:61)
    at org.jetbrains.android.uipreview.ModuleClassLoader.findClass(ModuleClassLoader.java:118)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.jetbrains.android.uipreview.ModuleClassLoader.loadClass(ModuleClassLoader.java:213)
    at android.support.design.widget.TabLayout$SlidingTabIndicator.setSelectedIndicatorHeight(TabLayout.java:2402)
    at android.support.design.widget.TabLayout.<init>(TabLayout.java:425)
    at android.support.design.widget.TabLayout.<init>(TabLayout.java:399)
    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 org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:481)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:264)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:222)
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:209)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:337)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:348)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:248)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:863)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:837)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:866)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:837)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:325)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:384)
    at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:544)
    at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:678)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

我已经检查了View类文件，但是其中有“ OnUnhandledKeyEventListener”。不知道为什么会发生此问题。请告诉我如何解决这个问题。

Answer 1

在应用程序> src> main> res> values文件夹中打开 styles.xml ，并更改此行

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

到

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

Answer 2

不幸的是，目前没有解决方法。 android.support.v4.view.ViewCompat在androidx包中未实现View.OnUnhandledKeyEventListener。该错误已提交here。

Answer 3

如果有人有相同的错误，请从中删除下一行代码

res> values>窗框

<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />-

就像@Kishan Viramgama或patrick休所说的...

Answer 4

步骤

将此添加到gradle 实施'com.android.support:appcompat-v7:28.0.0-alpha1'
实现'com.android.support:design:28.0.0-alpha1'与上述版本相同。

style.xml

  <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
                            to
  <style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

找不到OnUnhandledKeyEventListener类

4 个答案: