ClassCastException with custom xml

[gett]

I am trying to make custom control for xml. but it giving following error\[code\] java.lang.ClassCastException: com.tdsoc.android.cardzlib.ui.EventElementView cannot be cast to android.view.ViewGroup at android.view.LayoutInflater.rInflate(LayoutInflater.java:624) at android.view.LayoutInflater.inflate(LayoutInflater.java:408) at android.view.LayoutInflater.inflate(LayoutInflater.java:296) at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:279) at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:318) 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:1640) at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1391) at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.onXmlModelChanged(GraphicalEditorPart.java:1353) at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegateXmlModelChanged(LayoutEditorDelegate.java:395) at com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor.xmlModelChanged(CommonXmlEditor.java:328) at com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor$XmlModelStateListener.modelChanged(AndroidXmlEditor.java:1610) at com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor.wrapEditXmlModel(AndroidXmlEditor.java:1084) at com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor.wrapUndoEditXmlModel(AndroidXmlEditor.java:1160) at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ActionLinkStyleRange.onClick(GraphicalEditorPart.java:2457) at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ErrorLabelListener.mouseUp(GraphicalEditorPart.java:2522) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:219) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) 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(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:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410)\[/code\]