Android Eclipse'中布局编辑器的ClassCastException；s ADT插件

这很可能是因为。我想知道是否有其他人和我犯了同样的错误，是否有办法解决这个问题

我做了以下工作：

• 按照的指示
• 从顶部，转到文件->创建新项目->Android项目->从现有示例创建项目
• 选中安卓2.2
• 从下拉菜单中选择SkeletonApp
• 点击完成
• 从包资源管理器转到SkeletonActivity->res->layout->skeleton_activity.xml
• 在编辑器区域底部的选项卡中（编辑器区域是屏幕的中心），单击布局

然后我得到了错误“ClassCastException:android.widget.EditText不能强制转换为andoid.text.ViewGroup”。错误消息的全文如下所示

java.lang.ClassCastException: android.widget.EditText cannot be cast to android.view.ViewGroup
at android.view.LayoutInflater.rInflate(LayoutInflater.java:619)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
at android.view.LayoutInflater.inflate(LayoutInflater.java:296)
at com.android.layoutlib.bridge.Bridge.computeLayout(Bridge.java:397)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor.computeLayout(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor.recomputeLayout(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor.onConfigurationChange(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor.onTargetChange(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.onDescriptorsChanged(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.initUiRootNode(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor$1.updateEditor(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.gle1.GraphicalLayoutEditor$1.onTargetLoaded(Unknown Source)
at com.android.ide.eclipse.adt.AdtPlugin$16.run(Unknown Source)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4041)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3660)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2629)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2593)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2427)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:670)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:663)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)

---

不确定您是否已通过此错误，但对于未通过此错误的任何人：

下面是有问题的代码：

<EditText android:id="@+id/editor"
    android:layout_width="fill_parent" android:layout_height="0dip"
    android:autoText="true"
    android:capitalize="sentences"
    android:layout_weight="1"
    android:freezesText="true" >
    <requestFocus />
</EditText>

---

我还不知道为什么，但通过反复试验，是requestFocus元素导致了问题。删除该行，布局视图将再次工作。

答案在哪里？我认为我的问题问得很清楚，很简单，每个人都能理解。再说一遍，有没有人会犯和我一样的错误？