title: Android xml rendering issue in eclipse?
body: <p>On creating new xml files in a project, rendering issue occur with error log as follows:   </p>
  
  <pre><code>java.lang.NullPointerException
      Exception details are logged in Window &gt; Show View &gt; Error Log
      The following classes could not be instantiated:
      - android.support.v7.internal.app.WindowDecorActionBar (Open Class, Show Error Log)
      - android.support.v7.internal.widget.ActionBarContextView (Open Class, Show Error Log)
      - android.support.v7.widget.Toolbar (Open Class, Show Error Log)
  
  ...............
  
  java.lang.NullPointerException
      at android.support.v7.internal.widget.ActionBarOverlayLayout.getDecorToolbar(ActionBarOverlayLayout.java:594)
      at android.support.v7.internal.widget.ActionBarOverlayLayout.pullChildren(ActionBarOverlayLayout.java:583)
      at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:368)
      at android.view.View.measure(View.java:17547)
      at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
      at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
      at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
      at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
      at android.view.View.measure(View.java:17547)
      at android.widget.LinearLayout.measureVertical(LinearLayout.java:875)
      at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
      at android.view.View.measure(View.java:17547)
      at com.android.layoutlib.bridge.impl.RenderSessionImpl.measureView(RenderSessionImpl.java:637)
      at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:537)
      at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:323)
      at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:349)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:519)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1584)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1309)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.activated(GraphicalEditorPart.java:1066)
      at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegateActivated(LayoutEditorDelegate.java:743)
      at com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor.activated(CommonXmlEditor.java:416)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.LayoutWindowCoordinator.partActivated(LayoutWindowCoordinator.java:379)
      at org.eclipse.ui.internal.PartService$6.run(PartService.java:149)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      at org.eclipse.ui.internal.PartService.partActivated(PartService.java:146)
      at org.eclipse.ui.internal.WorkbenchPage$17.run(WorkbenchPage.java:4870)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      at org.eclipse.ui.internal.WorkbenchPage.firePartActivated(WorkbenchPage.java:4867)
      at org.eclipse.ui.internal.WorkbenchPage.access$18(WorkbenchPage.java:4846)
      at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:210)
      at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$3.run(PartServiceImpl.java:241)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
      at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:238)
      at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:692)
      at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:620)
      at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:608)
      at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.hidePart(PartServiceImpl.java:1276)
      at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.hidePart(PartServiceImpl.java:1215)
      at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.closePart(StackRenderer.java:1218)
      at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.access$3(StackRenderer.java:1200)
      at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$12.close(StackRenderer.java:1092)
      at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1874)
      at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:288)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4172)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
      at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
      at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
      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:648)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
      at org.eclipse.equinox.launcher.Main.main(Main.java:1438)
  </code></pre>