为什么会出现GXT异常以及如何解决它？

Question

我想创建一些简单的GWT + GXT应用程序。

• GWT是2.6.1
• GXT是3.1.0

我创建简单的类 MySampleApplication.java：

public class MySampleApplication implements EntryPoint { 
    public void onModuleLoad() { 
     AlertMessageBox d = new AlertMessageBox("title", "message"); 
     d.show(); 
    } 
} 

和简单声明MySampleApplication.gwt.xml：

<inherits name='com.google.gwt.user.User'/> 
<inherits name='com.sencha.gxt.ui.GXT'/> 
<inherits name='com.google.gwt.user.theme.clean.Clean'/> 
<stylesheet src="reset.css" /> 
<entry-point class='com.mySampleApplication.client.MySampleApplication'/> 

看起来没有什么更容易，但它失败：

onModuleLoad() threw an exception 
Exception while loading module com.mySampleApplication.client.MySampleApplication. 
See Development Mode for details. 
java.lang.reflect.InvocationTargetException at  
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at 
java.lang.reflect.Method.invoke(Method.java:483) at 
com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:411) at 
com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200) at 
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:526) at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.ExceptionInInitializerError at com.mySampleApplication.client.MySampleApplication.onModuleLoad(MySampleApplication.java:9) ... 9 more 
Caused by: 
java.lang.RuntimeException: Deferred binding failed for 
'com.sencha.gxt.widget.core.client.box.MessageBox$MessageBoxIcons' 
(did you forget to inherit a required module?) at 
com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:53) at  
com.google.gwt.core.shared.GWT.create(GWT.java:72) at 
com.google.gwt.core.client.GWT.create(GWT.java:86) at 
com.sencha.gxt.widget.core.client.box.MessageBox.<clinit>(MessageBox.java:57) ... 10 more Caused by: com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries) at com.google.gwt.dev.shell.ModuleSpace.rebind(ModuleSpace.java:610) at 
com.google.gwt.dev.shell.ModuleSpace.rebindAndCreate(ModuleSpace.java:470) at 
com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:49) ... 13 more 

Answer 1

删除<inherits name='com.google.gwt.user.theme.clean.Clean'/>它不是由GXT支持，看到Getting Started