我的 Eclipse 中的图形布局编辑器停止工作，它给了我这个消息：
java.lang.NullPointerException
Exception details are logged in Window > Show View > Error Log
我的错误日志中有这个：
eclipse.buildId=v21.1.0-569685
java.version=1.7.0_01
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product com.android.ide.eclipse.adt.package.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product
com.android.ide.eclipse.adt.package.product
!ENTRY org.eclipse.egit.ui 2 0 2013-04-14 00:03:01.507
!MESSAGE Warning: EGit couldn't detect the installation path "gitPrefix" of native Git. Hence
EGit can't respect system level
Git settings which might be configured in ${gitPrefix}/etc/gitconfig under the native Git
installation directory.
The most important of these settings is core.autocrlf. Git for Windows by default sets this parameter to true in
this system level configuration. The Git installation location can be configured on the
Team > Git > Configuration preference page's 'System Settings' tab.
This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
!ENTRY com.android.ide.eclipse.adt 4 0 2013-04-14 00:03:08.208
!MESSAGE dialog_game_paused.xml: java.lang.NullPointerException
!STACK 0
java.lang.NullPointerException
at android.graphics.Bitmap_Delegate.nativeWidth(Bitmap_Delegate.java:291)
at android.graphics.Bitmap.nativeWidth(Bitmap.java)
at android.graphics.Bitmap.getWidth(Bitmap.java:909)
at android.graphics.Bitmap.getScaledWidth(Bitmap.java:957)
at android.graphics.drawable.BitmapDrawable.computeBitmapSize(BitmapDrawable.java:179)
at android.graphics.drawable.BitmapDrawable.setBitmap(BitmapDrawable.java:187)
at android.graphics.drawable.BitmapDrawable.<init>(BitmapDrawable.java:555)
at android.graphics.drawable.BitmapDrawable.<init>(BitmapDrawable.java:110)
at com.android.layoutlib.bridge.impl.ResourceHelper.getDrawable(ResourceHelper.java:239)
at com.android.layoutlib.bridge.bars.CustomBar.loadIcon(CustomBar.java:196)
at com.android.layoutlib.bridge.bars.CustomBar.loadIconById(CustomBar.java:188)
at com.android.layoutlib.bridge.bars.CustomBar.loadIconById(CustomBar.java:155)
at com.android.layoutlib.bridge.bars.FakeActionBar.<init>(FakeActionBar.java:38)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:333)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:332)
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:440)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1545)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1302)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.changed(GraphicalEditorPart.java:718)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.onTargetChange(GraphicalEditorPart.java:1189)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.onDescriptorsChanged(LayoutEditorDelegate.java:916)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegateInitUiRootNode(LayoutEditorDelegate.java:835)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$TargetListener.updateEditor(GraphicalEditorPart.java:946)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$TargetListener.onTargetLoaded(GraphicalEditorPart.java:910)
at com.android.ide.eclipse.adt.AdtPlugin$11.run(AdtPlugin.java:1754)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4144)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
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:124)
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:353)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
我认为我的代码没有问题，因为有一段时间一切正常，然后 3 天前就发生了。