我基本上是全新的，并在书中通过一个例子。 我的button1.xml看起来像这样......
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:drawable="@drawable/buttonpressed" />
<item android:state_focused="true"
android:drawable="@drawable/buttonfocused" />
<item android:drawable="@drawable/buttonnormal" />
</selector>
... main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageButton
android:id="@+id/button_one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="5px"
android:src="@drawable/button1">
</ImageButton>
</LinearLayout>
我一直收到此错误
eclipse.buildId=M20110909-1335
java.version=1.7.0_01
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments: -os win32 -ws win32 -arch x86_64
Error
Tue Oct 25 12:19:07 CDT 2011
main.xml: Failed to parse file C:\Users\kpreese\workspace\Chapter7\res\drawable\button1.xml
org.xmlpull.v1.XmlPullParserException: Binary XML file line #4: <item> tag requires a 'drawable' attribute or child tag defining a drawable
at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:178)
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:832)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:769)
at com.android.layoutlib.bridge.impl.ResourceHelper.getDrawable(ResourceHelper.java:208)
at com.android.layoutlib.bridge.android.BridgeTypedArray.getDrawable(BridgeTypedArray.java:775)
at android.widget.ImageView.<init>(ImageView.java:118)
at android.widget.ImageButton.<init>(ImageButton.java:85)
at android.widget.ImageButton.<init>(ImageButton.java:81)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at android.view.LayoutInflater.createView(LayoutInflater.java:576)
at com.android.layoutlib.bridge.android.BridgeInflater.onCreateView(BridgeInflater.java:84)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:644)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669)
at com.android.layoutlib.bridge.android.BridgeInflater.createViewFromTag(BridgeInflater.java:129)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:83)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:702)
at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
at android.view.LayoutInflater.inflate(LayoutInflater.java:367)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:324)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:321)
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:1317)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1071)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$ConfigListener.onConfigurationChange(GraphicalEditorPart.java:493)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.onTargetChange(GraphicalEditorPart.java:973)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.onDescriptorsChanged(LayoutEditor.java:568)
at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditor.initUiRootNode(LayoutEditor.java:490)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$TargetListener.updateEditor(GraphicalEditorPart.java:787)
at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart$TargetListener.onTargetLoaded(GraphicalEditorPart.java:752)
at com.android.ide.eclipse.adt.AdtPlugin$11.run(AdtPlugin.java:1613)
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:4140)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
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)
at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
我似乎无法解决这个问题。我搜索并发现了许多类似的问题，但我自己并没有发现任何错误。有什么建议吗？
- 我确实尝试切换两个文件（按下按钮和按钮），但仍然在同一行代码中收到错误。然后用ic_launcher文件替换了所有文件，这也导致了同样的错误。如果我设置android.src =＆＃34;＃00000000＆＃34;它确实有效。我不知道这是否有帮助，但似乎表明问题不是文件，而是在button1.xml代码中。
所以我认为我已经修好了。我不确定我做了什么，但重新输入了 机器人：SRC =＆＃34; @可绘制/ button1的＆＃34;＆GT; 线。它有效。谢谢你们的帮助！
答案 0 :(得分：4)
我有同样的问题。 在我的情况下，XML文件中的xml标记之前有一个空格（从Android开发人员网页复制的源代码） 删除空间并读取图像按钮后，一切正常。 我试图重新插入空间并再次遇到同样的错误。
答案 1 :(得分：2)
更改
<ImageButton
android:id="@+id/button_one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="5px"
android:src="@drawable/button1">
到
<ImageButton
android:id="@+id/button_one"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="5px"
android:background="@drawable/button1">
请注意，android:src="@drawable/button1"已更改为android:background="@drawable/button1"
答案 2 :(得分：2)
如果您在Android 4.0 sdk中使用ADT 14，则存在与州列表drawables相关的问题（http://code.google.com/p/android/issues/detail?id=21046）。
一个临时解决方案就是用参数-clean启动eclipse（其他一些人报告说这没有帮助）。但你可以尝试一下。
答案 3 :(得分：2)
清理项目并重新启动Eclipse为我工作..
答案 4 :(得分：0)
转到Build-> Clean project and Rebuild project。它有效...