Eclipse IDE中的图形布局错误

有这个项目我正在做，我需要从另一个项目复制一个xml代码。我这样做后，我的项目中没有任何xml文件出现在图形布局中。取而代之的是这样写的警告：Eclipse IDE中的图形布局错误

java.lang.NullPointerException 
Exception details are logged in Window > Show View > Error Log

当我看到它在错误日志，我得到。

消息：

chat_layout.xml: java.lang.NullPointerException

异常堆栈跟踪：

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.activated(GraphicalEditorPart.java:1059) 
    at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegatePageChange(LayoutEditorDelegate.java:683) 
    at com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor.pageChange(CommonXmlEditor.java:360) 
    at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:290) 
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248) 
    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.Widget.sendEvent(Widget.java:1077) 
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) 
    at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774) 
    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.Widget.sendEvent(Widget.java:1053) 
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169) 
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758) 
    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)

图形布局工作正常，所有我在Eclipse项目的所有其他XML文件，除了这一个。在复制之前一切正常。该怎么办？？

xml文件如下。

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:background="@android:color/background_dark" 
    android:orientation="vertical" > 

    <LinearLayout 
     android:id="@+id/bottom_write_bar" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_alignParentBottom="true" > 

     <EditText 
      android:id="@+id/textbox" 
      android:layout_width="0dip" 
      android:layout_height="fill_parent" 
      android:layout_margin="5sp" 
      android:layout_weight="1" 
      android:hint="Write here" 
      android:padding="5sp" 
      tools:ignore="HardcodedText" /> 

     <Button 
      android:layout_width="wrap_content" 
      android:layout_height="fill_parent" 
      android:layout_margin="5sp" 
      android:onClick="sendMessage" 
      android:paddingBottom="5sp" 
      android:paddingLeft="15sp" 
      android:paddingRight="15sp" 
      android:paddingTop="5sp" 
      android:text="Send" 
      android:textColor="#FFF" 
      tools:ignore="HardcodedText" /> 

    </LinearLayout> 

    <ListView 
     android:id="@android:id/list" 
     android:layout_width="fill_parent" 
     android:layout_height="0dip" 
     android:layout_above="@id/bottom_write_bar" 
     android:layout_alignParentTop="true" 
     android:cacheColorHint="#00000000" 
     android:divider="#00000000" 
     android:listSelector="#00000000" > 
    </ListView> 

    <TextView 
     android:id="@android:id/empty" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_above="@id/bottom_write_bar" 
     android:layout_alignParentTop="true" 
     android:gravity="center_vertical|center_horizontal" /> 

</RelativeLayout>

来源

2013-07-16 iCoder7

请同时提供导致错误的chat_layout.xml。它看起来像一个图像资源丢失，并阻止用户界面渲染... – a11n

是的，我现在已经附上了代码。 – iCoder7