“android.view.View无法强制转换为android.view.ViewGroup”异常

时间：2012-06-16 10:50:42

标签： android android-layout

我正在开发一个Android应用程序，我添加了一个xml布局文件，该文件应该是以后的片段：

<?xml version="1.0" encoding="utf-8"?>
<View xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/imgTile"
        android:src="@drawable/tile_background"
        android:contentDescription="@string/CD_TILE_BACKGROUND_IMAGE"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </ImageView>

</View>

当我尝试回到Eclipse中的图形布局时，我在错误日志中得到此异常：

java.lang.ClassCastException: android.view.View cannot be cast to android.view.ViewGroup
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:740)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:64)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:711)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:372)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:321)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:324)
    at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:325)
    at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:372)
    at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1361)
    at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1115)
    at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.activated(GraphicalEditorPart.java:941)
    at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegatePageChange(LayoutEditorDelegate.java:450)
    at com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor.pageChange(CommonXmlEditor.java:358)
    at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:290)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
    at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)
    at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:2746)
    at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1433)
    at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:257)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)
    at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3613)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
    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:344)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1410)

任何人都可以帮我解决这个例外吗？

2 个答案:

答案 0 :(得分：31)

我认为你应该使用

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/imgTile"
        android:src="@drawable/tile_background"
        android:contentDescription="@string/CD_TILE_BACKGROUND_IMAGE"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </ImageView>

</LinearLayout >

由于View没有像add（other_view）这样的函数，你可以在ViewGorup中添加一个视图......

答案 1 :(得分：0)

我知道我参加聚会很晚，但是以防万一有人为同样的问题而烦恼，当我尝试在寻呼机适配器图像中添加缩放功能时，这是一种对我有用的解决方案。 信息：这不是确切的答案，但是对于那些面临相同问题的人来说，这可能是一个解决方案。我发布此消息是因为我在stackOverflow的任何地方都没有找到这种解决方法

| ID | Name |
|----|------|
| 32 | Name1 |
| 32 | Name2 |
| 32 | Name3 |
| 28 | Name4 |
| 28 | Name5 |
| 33 | Name6 |
| 33 | Name7 |
| 41 | Name8 |
| 55 | Name9 |

在上面的代码中，只需将<select> <?php $count_line = 0; $sql="SELECT * FROM subject"; $result=mysqli_query($conn, $sql); while($row = $result->fetch_assoc()) { ?> <option><?php echo $row['Name'];?></option> <?php if ($count_line == 2) { echo "<optgroup label='--------------------'></optgroup> "; $count_line=0; } $count_line++; } ?> </select> 替换为 <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <ImageView android:id="@+id/head_image" android:layout_width="match_parent" android:layout_height="wrap_content" android:scaleType="centerCrop" android:src="@drawable/head_image" /> </RelativeLayout> 。

TouchImageView （或其他任何类）是一个自定义类（您需要制作），该类应该扩展 android.support.v7.widget.AppCompatImageView

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