Question

您能告诉我如何解决该ClassCastExeption吗？

* java.lang.ClassCastException：com.intellij.psi.impl.source.PsiPlainTextFileImpl无法转换为com.intellij.psi.xml.XmlFile 在com.android.tools.idea.common.model.NlModel.getFile（NlModel.java:230）在com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager $ ModelChangeListener.modelActivated（LayoutlibSceneManager.java:454）在com.android.tools.idea.common.model.NlModel.lambda $ activate $ 0（NlModel.java:184）在java.lang.Iterable.forEach（Iterable.java:75）在com.android.tools.idea.util.ListenerCollection $ forEach $ 1.run（ListenerCollection.kt：80）在com.google.common.util.concurrent.MoreExecutors $ DirectExecutor.execute（MoreExecutors.java:398）在com.android.tools.idea.util.ListenerCollection.forEach（ListenerCollection.kt：79）在com.android.tools.idea.common.model.NlModel.activate（NlModel.java:184）在com.android.tools.idea.common.surface.DesignSurface.activate（DesignSurface.java:925）在com.android.tools.idea.common.editor.DesignerEditorPanel.activate（DesignerEditorPanel.java:190）在com.android.tools.idea.common.editor.DesignerEditor.selectNotify（DesignerEditor.java:87）在com.intellij.openapi.fileEditor.impl.EditorTabbedContainer $ 2.selectionChanged（EditorTabbedContainer.java:151）在com.intellij.ui.tabs.impl.JBTabsImpl.fireSelectionChanged（JBTabsImpl.java:947）在com.intellij.ui.tabs.impl.JBTabsImpl.executeSelectionChange（JBTabsImpl.java:903） at com.intellij.ui.tabs.impl.JBTabsImpl.access $ 1900（JBTabsImpl.java:52）在com.intellij.ui.tabs.impl.JBTabsImpl $ 9.run（JBTabsImpl.java:862）在com.intellij.openapi.fileEditor.impl.EditorTabbedContainer.lambda $ null $ 2（EditorTabbedContainer.java:163）在com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand（CoreCommandProcessor.java:220）在com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand（CoreCommandProcessor.java:178）在com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand（CoreCommandProcessor.java:168）在com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand（CoreCommandProcessor.java:154）在com.intellij.openapi.fileEditor.impl.EditorTabbedContainer.lambda $ new $ 3（EditorTabbedContainer.java:161）在com.intellij.ui.tabs.impl.JBTabsImpl._setSelected（JBTabsImpl.java:858）在com.intellij.ui.tabs.impl.JBTabsImpl.select（JBTabsImpl.java:849）在com.intellij.ui.tabs.impl.TabLabel $ 1.mousePressed（TabLabel.java:96）在java.awt.AWTEventMulticaster.mousePressed（AWTEventMulticaster.java:279）在java.awt.AWTEventMulticaster.mousePressed（AWTEventMulticaster.java:279）在java.awt.Component.processMouseEvent（Component.java:6547）在javax.swing.JComponent.processMouseEvent（JComponent.java:3325）在java.awt.Component.processEvent（Component.java:6315）在java.awt.Container.processEvent（Container.java:2239）在java.awt.Component.dispatchEventImpl（Component.java:4899）在java.awt.Container.dispatchEventImpl（Container.java:2297）在java.awt.Component.dispatchEvent（Component.java:4721）在java.awt.LightweightDispatcher.retargetMouseEvent（Container.java:4904）在java.awt.LightweightDispatcher.processMouseEvent（Container.java:4532）在java.awt.LightweightDispatcher.dispatchEvent（Container.java:4476）在java.awt.Container.dispatchEventImpl（Container.java:2283）在java.awt.Window.dispatchEventImpl（Window.java:2746）在java.awt.Component.dispatchEvent（Component.java:4721）在java.awt.EventQueue.dispatchEventImpl（EventQueue.java:766）在java.awt.EventQueue.access $ 500（EventQueue.java:98）在java.awt.EventQueue $ 3.run（EventQueue.java:715）在java.awt.EventQueue $ 3.run（EventQueue.java:709）在java.security.AccessController.doPrivileged（本机方法）在java.security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilege（ProtectionDomain.java:74）在java.security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilege（ProtectionDomain.java:84）在java.awt.EventQueue $ 4.run（EventQueue.java:739）在java.awt.EventQueue $ 4.run（EventQueue.java:737）在java.security.AccessController.doPrivileged（本机方法）在java.security.ProtectionDomain $ JavaSecurityAccessImpl.doIntersectionPrivilege（ProtectionDomain.java:74）在java.awt.EventQueue.dispatchEvent（EventQueue.java:736）在com.intellij.ide.IdeEventQueue.defaultDispatchEvent（IdeEventQueue.java:757）在com.intellij.ide.IdeEventQueue._dispatchEvent（IdeEventQueue.java:702）在com.intellij.ide.IdeEventQueue.dispatchEvent（IdeEventQueue.java:375）在java.awt.EventDispatchThread.pumpOneEventForFilters（EventDispatchThread.java:205）在java.awt.EventDispatchThread.pumpEventsForFilter（EventDispatchThread.java:116）在java.awt.EventDispatchThread.pumpEventsForHierarchy（EventDispatchThread.java:105）在java.awt.EventDispatchThread.pumpEvents（EventDispatchThread.java:101）在java.awt.EventDispatchThread.pumpEvents（EventDispatchThread.java:93）在java.awt.EventDispatchThread.run（EventDispatchThread.java:82）



>MainActivity.java:

package com.example.findyourgift;

import androidx.appcompat.app.AppCompatActivity;

导入android.os.Bundle;

公共类MainActivity扩展了AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

} *

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="279dp"
        android:layout_height="101dp"
        android:fontFamily="monospace"
        android:gravity="center"
        android:text="@string/textStart"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.242" />

</androidx.constraint

如何解决ClassCastExeption？

0 个答案: