跨ClassLoader的Java 8 ScriptEngine（java跨类调用）

25-03-17 9

这篇文章主要围绕跨ClassLoader的Java8ScriptEngine和java跨类调用展开，旨在为您提供一份详细的参考资料。我们将全面介绍跨ClassLoader的Java8ScriptEng

这篇文章主要围绕跨ClassLoader的Java 8 ScriptEngine和java跨类调用展开，旨在为您提供一份详细的参考资料。我们将全面介绍跨ClassLoader的Java 8 ScriptEngine的优缺点，解答java跨类调用的相关问题，同时也会为您带来android – dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)中的类加载错误？、ClassLoader.loadClass() throws java.lang.ClassNotFoundException、com.intellij.lang.javascript.JavaScriptSupportLoader的实例源码、dalvik.system.BaseDexClassLoader.findClass中的java.lang.ClassNotFoundException的实用方法。

本文目录一览：

跨ClassLoader的Java 8 ScriptEngine（java跨类调用）
android – dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)中的类加载错误？
ClassLoader.loadClass() throws java.lang.ClassNotFoundException
com.intellij.lang.javascript.JavaScriptSupportLoader的实例源码
dalvik.system.BaseDexClassLoader.findClass中的java.lang.ClassNotFoundException

跨ClassLoader的Java 8 ScriptEngine（java跨类调用）

我需要在不同的类加载器内部执行一些javascript代码。如果是Java，则每个任务将在单独的类加载器中运行。现在，我需要使用JavaScript。

我需要ScriptEngine在每个类加载器中创建的新实例，还是可以在类加载器之间共享一个实例？

答案1

小编典典

从您的问题尚不清楚，您为什么要寻找这样的类加载器隔离。因此，我在这里总结nashorn的类加载器-也许，您会找到想要的东西。

Nashorn和类加载器：

Nashorn类（jdk.nashorn。*）由Java扩展类加载器加载
生成的脚本类，适配器（子类，脚本的接口实现）由nashorn的内部类加载器加载。
从脚本引用的Java类由Nashorn的“应用类加载器”加载。

（1）和（2）无法自定义。nashorn代码中假设它是特权代码。并且有关于通用脚本类加载器和适配器加载器的假设。

（3）默认是创建nashorn引擎时的线程上下文类加载器。如果线程上下文类加载器为null，则使用Nashorn自己的加载器（扩展加载器）。

因此，如果在通过Thread.setContextClassLoader
API设置了合适的线程上下文加载器之后创建了Nashorn引擎，则可以控制脚本引擎的“应用程序类加载器”。

如果可以使用NashornScriptEngineFactory（特定于nashorn的API
https://docs.oracle.com/javase/8/docs/jdk/api/nashorn/jdk/nashorn/api/scripting/NashornScriptEngineFactory.html）创建脚本引擎，您也可以通过编程方式将任何类加载器作为“应用类加载器”传递。您可能要签出接受ClassLoader参数的NashornScriptEngineFactory方法。

除了“应用程序类加载器”外，您还可以选择在“应用程序类加载器”之前搜索其他附加的类加载器。这由“ -cp”或“ -classpath”
nashorn命令行选项指定。请注意，您可以通过“
nashorn.args”系统属性为脚本引擎指定nashorn命令行选项，也可以使用NashornScriptEngineFactory类的getScriptEngine方法以编程方式传递。另请参阅：https
:
//wiki.openjdk.java.net/display/Nashorn/Nashorn+jsr223+engine+notes

希望这可以帮助。

android – dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)中的类加载错误？

无法运行以下项目,项目中没有错误.我已经多次运行该项目了.请有人帮我解决问题.

AndroidManifest.xml中：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.extremefitness.org"
    android:versionCode="1"
    android:versionName="1.0" >

    <supports-screens
        android:anyDensity="false"
        android:largeScreens="true"
        android:normalScreens="true"
        android:smallScreens="true"
        android:xlargeScreens="true" />

    <uses-permission android:name="android.permission.INTERNET" >
    </uses-permission>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >
    </uses-permission>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" >
    </uses-permission>
    <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
    <uses-permission android:name="android.permission.CLEAR_APP_CACHE" >
    </uses-permission>
    <uses-permission android:name="android.permission.disABLE_KEyguard" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".Tabbaractivity"
            android:windowSoftInputMode="adjustPan|adjustResize" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".HomeActivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.LoginActivity"
            android:noHistory="true"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.Registeractivity"
            android:noHistory="true"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.Profiletabactivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.RandomWorkouttabactivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.Tracktabactivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.Workouttabactivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.StatsActivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.ExerciseActivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.CustomDialog"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.WorkoutDescription"
            android:noHistory="true"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.ExerciseDescription"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.Settings"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>

        <activity
            android:name="com.extremefitness.views.RandomWorkoutResponse"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name=".FBActivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name=".Twitteractivity"
            android:screenorientation="portrait"
            android:windowSoftInputMode="adjustPan|adjustResize" >
        </activity>
        <activity
            android:name="com.extremefitness.views.VideoDialog"
            android:configChanges="orientation|screenSize|keyboardHidden"
            android:screenorientation="nosensor" >
            <Meta-data
                android:name="@string/minVersion"
                android:value="8" />
            <Meta-data
                android:name="@string/isLaunchableActivity"
                android:value="true" />
        </activity>
        <activity
            android:name="com.extremefitness.views.WorktVideoDialog"
            android:configChanges="orientation|screenSize|keyboardHidden"
            android:screenorientation="nosensor" >
            <Meta-data
                android:name="@string/minVersion"
                android:value="8" />
            <Meta-data
                android:name="@string/isLaunchableActivity"
                android:value="true" />
        </activity>
    </application>

</manifest>

错误的日志：

04-26 14:45:08.211: E/AndroidRuntime(2179): FATAL EXCEPTION: main
04-26 14:45:08.211: E/AndroidRuntime(2179): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.extremefitness.org/com.extremefitness.org.Tabbaractivity}: java.lang.classNotFoundException: com.extremefitness.org.Tabbaractivity
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:1894)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.app.ActivityThread.access$600(ActivityThread.java:128)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.os.Looper.loop(Looper.java:137)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.app.ActivityThread.main(ActivityThread.java:4517)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at java.lang.reflect.Method.invokeNative(Native Method)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at java.lang.reflect.Method.invoke(Method.java:511)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at dalvik.system.NativeStart.main(Native Method)
04-26 14:45:08.211: E/AndroidRuntime(2179): Caused by: java.lang.classNotFoundException: com.extremefitness.org.Tabbaractivity
04-26 14:45:08.211: E/AndroidRuntime(2179):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at java.lang.classLoader.loadClass(ClassLoader.java:501)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at java.lang.classLoader.loadClass(ClassLoader.java:461)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.app.Instrumentation.newActivity(Instrumentation.java:1027)
04-26 14:45:08.211: E/AndroidRuntime(2179):     at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:1885)
04-26 14:45:08.211: E/AndroidRuntime(2179):     ... 11 more

解决方法

我遇到同样的问题,检查构建路径,你的第三个罐子没有在你的apk文件中. 1.右键单击您的项目,选择“构建路径” – > “配置构建路径…”. 2.在“订购和导出”选项卡中,选中“Android私有库”选项. 希望工作.

ClassLoader.loadClass() throws java.lang.ClassNotFoundException

[python] view plain copy

root exception is java.rmi.MarshalException:error marshalling arguments:nested exception

今天写一个 RMI 的应用，气死人了，弄半天，跑到 sun 官网去一看，告诉我是一个 BUG, 我流出了鼻血。

[java] view plain copy

Exception in thread "main" java.lang.ClassNotFoundException: [Ljava.lang.String;

at java.net.URLClassLoader$1.run(URLClassLoader.java:200)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)

at java.lang.ClassLoader.loadClass(ClassLoader.java:251)

at test.main(test.java:7)

ToWork:

-Dsun.lang.ClassLoader.allowArraySyntax=true

点击打开链接

原文链接： http://blog.csdn.net/chengchanglun/article/details/7441034

com.intellij.lang.javascript.JavaScriptSupportLoader的实例源码

项目：consulo-javascript 文件：JSResolveUtil.java

public static String findPackageForMxml(final PsiElement expression)
{
    String s = null;
    final PsiFile containingFile = expression.getContainingFile();

    if(containingFile.getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4 && containingFile.getContext() != null)
    {
        final PsiFile contextContainigFile = containingFile.getContext().getContainingFile();
        VirtualFile file = contextContainigFile.getVirtualFile();
        if(file == null && contextContainigFile.getoriginalFile() != null)
        {
            file = contextContainigFile.getoriginalFile().getVirtualFile();
        }

        s = getExpectedPackageNameFromFile(file,containingFile.getProject(),true);
    }
    return s;
}

项目：consulo-javascript 文件：JSResolveUtil.java

public static JSClass getClassFromTagNameInMxml(final PsiElement psiElement)
{
    XmlTag tag = psiElement != null ? PsiTreeUtil.getNonStrictParentOfType(psiElement,XmlTag.class) : null;
    if(tag != null && (tag.getNamespacePrefix().length() > 0 || JavaScriptSupportLoader.isFlexMxmFile(tag.getContainingFile())))
    {
        if(isScriptContextTag(tag))
        {
            tag = ((XmlFile) tag.getContainingFile()).getDocument().getRoottag();
        }
        final XmlElementDescriptor descriptor = tag.getDescriptor();

        if(descriptor != null)
        {
            PsiElement decl = descriptor.getDeclaration();
            if(decl instanceof JSClass)
            {
                return ((JSClass) decl);
            }
            else if(decl instanceof XmlFile)
            {
                return XmlBackedJSClassImpl.getXmlBackedClass((XmlFile) decl);
            }
        }
    }
    return null;
}

项目：consulo-javascript 文件：XmlBackedJSClassImpl.java

public static String findScriptNs(XmlTag roottag)
{
    String ns = roottag.getNamespace();
    if(JavaScriptSupportLoader.isFlexMxmFile(roottag.getContainingFile()))
    {
        ns = "";
        for(String testNs : JavaScriptSupportLoader.MXML_URIS)
        {
            if(roottag.getPrefixByNamespace(testNs) != null)
            {
                ns = testNs;
                break;
            }
        }
    }
    return ns;
}

项目：consulo-javascript 文件：JavaScriptSymbolContributor.java

@NotNull
@Override
public String[] getNames(Project project,boolean includeNonProjectItems)
{
    final Set<String> result = new HashSet<String>();

    result.addAll(StubIndex.getInstance().getAllKeys(JavaScriptIndexKeys.ELEMENTS_BY_NAME,project));

    FileBasedindex.getInstance().processAllKeys(FilenameIndex.NAME,new Processor<String>()
    {
        @Override
        public boolean process(String s)
        {
            if(JavaScriptSupportLoader.isFlexMxmFile(s))
            {
                result.add(FileUtil.getNameWithoutExtension(s));
            }
            return true;
        }
    },project);
    return result.toArray(new String[result.size()]);
}

项目：consulo-javascript 文件：BaseJSGenerateAction.java

@Override
public void actionPerformed(final AnActionEvent e)
{
    Editor editor = e.getData(PlatformDataKeys.EDITOR);
    PsiFile psifile = e.getData(LangDataKeys.PSI_FILE);
    Project project = e.getData(PlatformDataKeys.PROJECT);

    final VirtualFile file = e.getData(PlatformDataKeys.VIRTUAL_FILE);
    if(JavaScriptSupportLoader.isFlexMxmFile(file))
    {
        editor = BaseCodeInsightAction.getInjectedEditor(project,editor);
        psifile = PsiUtilBase.getPsiFileInEditor(editor,project);
    }

    new JavaScriptGenerateAccessorHandler(getGenerationMode()).invoke(project,editor,psifile);
}

项目：consulo-javascript 文件：JSUntypedDeclarationinspection.java

private static void process(final JSNamedElement node,final ProblemsHolder holder)
{
    if(node.getContainingFile().getLanguage() != JavaScriptSupportLoader.ECMA_SCRIPT_L4)
    {
        return;
    }
    PsiElement nameIdentifier = node.getNameIdentifier();

    if(nameIdentifier != null &&
            JSPsiImplUtils.getTypeFromDeclaration(node) == null &&
            (!(node instanceof JSParameter) || !((JSParameter) node).isRest()))
    {
        holder.registerProblem(nameIdentifier,JavaScriptBundle.message(node instanceof JSFunction ? "js.untyped.function.problem" : "js.untyped" +
                ".variable.problem",nameIdentifier.getText()),ProblemHighlightType.GENERIC_ERROR_OR_WARNING,new AddTypetoDclFix());
    }
}

项目：emberjs-plugin 文件：EmberJSParser.java

public EmberJSParser(PsiBuilder builder) {
    super(JavaScriptSupportLoader.JAVASCRIPT_1_5,builder);
    myExpressionParser = new EmberJSExpressionParser();
    myStatementParser = new StatementParser<EmberJSParser>(this) {
        @Override
        protected void doParseStatement(boolean canHaveClasses) {
            final IElementType firstToken = builder.getTokenType();
            if (firstToken == JSTokenTypes.LBRACE) {
                parseExpressionStatement();
                checkForSemicolon();
                return;
            }
            if (isIdentifierToken(firstToken)) {
                final IElementType nextToken = builder.lookAhead(1);
                if (nextToken == JSTokenTypes.IN_KEYWORD) {
                    parseInStatement();
                    return;
                }
            }
            if (builder.getTokenType() == JSTokenTypes.LPAR) {
                if (parseInStatement()) {
                    return;
                }
            }
            super.doParseStatement(canHaveClasses);
        }

        private boolean parseInStatement() {
            PsiBuilder.Marker statement = builder.mark();
            if (!getExpressionParser().parseInExpression()) {
                statement.drop();
                return false;
            }
            statement.done(JSElementTypes.EXPRESSION_STATEMENT);
            return true;
        }
    };
}

项目：consulo-javascript 文件：JSDocumentationProvider.java

private static String doGenerateDoc(final JSFunction function)
{
    StringBuilder builder = new StringBuilder();
    final JSParameterList parameterList = function.getParameterList();
    final PsiFile containingFile = function.getContainingFile();
    final boolean ecma = containingFile.getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4;

    if(parameterList != null)
    {
        for(JSParameter parameter : parameterList.getParameters())
        {
            builder.append("* @param ").append(parameter.getName());
            //String s = JSPsiImplUtils.getTypeFromDeclaration(parameter);
            //if (s != null) builder.append(" : ").append(s);
            builder.append("\n");
        }
    }

    if(ecma)
    {
        String s = JSPsiImplUtils.getTypeFromDeclaration(function);

        if(s != null && !"void".equals(s))
        {
            builder.append("* @return ");

            //builder.append(s);
            builder.append("\n");
        }
    }

    return builder.toString();
}

项目：consulo-javascript 文件：JSResolveUtil.java

public static Collection<JSQualifiednamedElement> findElementsByName(String name,Project project,GlobalSearchScope scope)
{
    final Set<JSQualifiednamedElement> result = new HashSet<JSQualifiednamedElement>();
    Collection<JSQualifiednamedElement> jsQualifiednamedElements = StubIndex.getElements(JavaScriptIndexKeys.ELEMENTS_BY_NAME,name,project,scope,JSQualifiednamedElement.class);

    for(JSQualifiednamedElement e : jsQualifiednamedElements)
    {
        result.add((JSQualifiednamedElement) e.getNavigationElement());
    }

    Collection<VirtualFile> files = new ArrayList<VirtualFile>();
    files.addAll(FileBasedindex.getInstance().getContainingFiles(FilenameIndex.NAME,name + JavaScriptSupportLoader.MXML_FILE_EXTENSION_DOT,scope));
    files.addAll(FileBasedindex.getInstance().getContainingFiles(FilenameIndex.NAME,name + JavaScriptSupportLoader.MXML_FILE_EXTENSION2_DOT,scope));

    for(final VirtualFile file : files)
    {
        if(!file.isValid())
        {
            continue;
        }
        final PsiFile psiFile = PsiManager.getInstance(project).findFile(file);
        if(psiFile != null)
        {
            result.add(XmlBackedJSClassImpl.getXmlBackedClass((XmlFile) psiFile));
        }
    }
    return result;
}

项目：consulo-javascript 文件：JSResolveUtil.java

public static String getQNametoStartHierarchySearch(final JSFunction node)
{
    PsiElement parentNode = node.getParent();
    parentNode = getClassReferenceForXmlFromContext(parentNode);

    if(parentNode instanceof JSClass)
    {
        final JSAttributeList attributeList = node.getAttributeList();

        if(attributeList == null ||
                !attributeList.hasModifier(JSAttributeList.ModifierType.OVERRIDE) ||
                attributeList.hasModifier(JSAttributeList.ModifierType.STATIC) ||
                attributeList.getAccesstype() == JSAttributeList.Accesstype.PRIVATE)
        {
            return null;
        }

        if(parentNode instanceof JSClass)
        {
            return ((JSClass) parentNode).getQualifiedname();
        }
    }
    else if(node instanceof JSFunctionExpression && parentNode.getContainingFile().getLanguage() != JavaScriptSupportLoader.ECMA_SCRIPT_L4)
    {
        final ContextResolver resolver = new ContextResolver(node.getFirstChild());
        return resolver.getQualifierAsstring();
    }
    else if(parentNode instanceof JSFile && parentNode.getContainingFile().getLanguage() != JavaScriptSupportLoader.ECMA_SCRIPT_L4)
    {
        return node.getName();
    }
    return null;
}

项目：consulo-javascript 文件：JSResolveUtil.java

public ImplicitJSVariableImpl(final String name,String qName,PsiFile containingFile)
{
    super(containingFile.getManager(),JavaScriptSupportLoader.ECMA_SCRIPT_L4.getBaseLanguage());
    myContainingFile = containingFile;
    myName = name;
    myType = qName;
}

项目：consulo-javascript 文件：JSImportHandlingUtil.java

public static boolean isAdequatePlaceForImport(final PsiNamedElement parent,@NotNull PsiElement place)
{
    if(parent instanceof JSFile && !parent.getLanguage().isKindOf(JavaScriptSupportLoader.ECMA_SCRIPT_L4))
    {
        return false;
    }

    if(place instanceof JSReferenceExpression)
    {
        final PsiElement placeParent = place.getParent();

        if(placeParent instanceof JSReferenceExpression)
        {
            final PsiElement currentParent = JSResolveUtil.getTopReferenceParent(placeParent);

            if(JSResolveUtil.isSelfReference(currentParent,place) ||
                    //currentParent instanceof JSDeFinitionExpression ||
                    currentParent instanceof JSReferenceList)
            {
                return false;
            }
        }
    }
    else if(place instanceof JSDocTagValue)
    {
        // further conditions to come
    }
    else
    {
        if(!(place instanceof JSFile))
        {
            return false;
        }
    }

    return true;
}

项目：consulo-javascript 文件：JSParameterInfoHandler.java

public static String getSignatureForParameter(final JSParameter p,boolean skipType)
{
    final String s = skipType ? null : p.getTypestring();

    if(s != null && s.length() > 0)
    {
        final boolean ecmal4 = p.getContainingFile().getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4;
        String result;

        if(ecmal4)
        {
            if(p.isRest())
            {
                result = "...";
            }
            else
            {
                result = p.getName() + ":" + s;
            }
        }
        else
        {
            result = "[" + s + "] " + p.getName();
        }
        final String initializerText = p.getinitializerText();
        if(initializerText != null)
        {
            result += " = " + initializerText;
        }
        return result;
    }
    return p.getName();
}

项目：consulo-javascript 文件：JSWithTryCatchFinallySurrounder.java

protected static String getExceptionVarTypeBasedOnContext(@NotNull PsiElement context)
{
    if(context.getContainingFile().getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4)
    {
        return ":Error";
    }
    return "";
}

项目：consulo-javascript 文件：BaseJSGenerateAction.java

@Override
public void update(final AnActionEvent e)
{
    final VirtualFile file = e.getData(PlatformDataKeys.VIRTUAL_FILE);

    boolean status = false;

    if(file != null)
    {
        if(file.getFileType() == JavaScriptFileType.INSTANCE)
        {
            final Editor editor = e.getData(PlatformDataKeys.EDITOR);
            final PsiFile psifile = e.getData(LangDataKeys.PSI_FILE);

            if(editor != null && psifile != null)
            {
                status = psifile.getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4;
            }
        }
        else if(JavaScriptSupportLoader.isFlexMxmFile(file))
        {
            status = true;
        }
    }

    e.getPresentation().setEnabled(status);
    e.getPresentation().setVisible(status);
}

项目：consulo-javascript 文件：JSUnresolvedFunctioninspection.java

private static ProblemHighlightType getHighlightTypeForTypeOrSignatureProblem(@NotNull PsiElement node)
{
    if(node.getContainingFile().getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4)
    {
        return ProblemHighlightType.GENERIC_ERROR;
    }
    return ProblemHighlightType.GENERIC_ERROR_OR_WARNING;
}

项目：consulo-javascript 文件：JSIntroduceFieldHandler.java

@Override
protected JSExpression findIntroducedExpression(final PsiFile file,final int start,final int end,Editor editor)
{
    if(file.getLanguage() != JavaScriptSupportLoader.ECMA_SCRIPT_L4)
    {
        CommonRefactoringUtil.showErrorHint(file.getProject(),JavaScriptBundle.message("javascript.introduce.field.error.not.available.in.javascript" +
                ".code"),getRefactoringName(),null);
        return null;
    }

    return super.findIntroducedExpression(file,start,end,editor);
}

项目：consulo-javascript 文件：JssplitDeclarationAndInitializationIntention.java

@Override
public void processIntention(@NotNull PsiElement element) throws IncorrectOperationException {
       assert (element instanceof JSVarStatement);

       final JSVarStatement varStatement      = (JSVarStatement) element;
       StringBuilder        declarationBuffer = new StringBuilder();
       List<String>         initializations   = new ArrayList<String>();

       for (JSVariable variable : varStatement.getvariables()) {
           declarationBuffer.append((declarationBuffer.length() == 0) ? VAR_KEYWORD : ",")
                            .append(variable.getName());

           String s = JSPsiImplUtils.getTypeFromDeclaration(variable);
           final PsiFile containingFile = element.getContainingFile();

           if (s == null && containingFile.getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4) {
               s = JSResolveUtil.getExpressionType(variable.getinitializer(),containingFile);
           }

           if (s != null) {
               declarationBuffer.append(":").append(s);
           }
           if (variable.hasInitializer()) {
               initializations.add(variable.getName() + '=' + variable.getinitializer().getText() + ';');
           }
       }
       declarationBuffer.append(';');

       // Do replacement.
       Jsstatement newStatement = JSElementFactory.replaceStatement(varStatement,declarationBuffer.toString());

       for (final String initialization : initializations) {
           newStatement = JSElementFactory.addStatementAfter(newStatement,initialization);
       }
   }

项目：consulo-javascript 文件：JSResolveUtil.java

public static boolean isNewResolveAndCompletion(PsiFile psiFile)
{
    return psiFile.getLanguage().isKindOf(JavaScriptSupportLoader.ECMA_SCRIPT_L4) || JavaScriptSupportLoader.isFlexMxmFile(psiFile);
}

项目：consulo-javascript 文件：ResolveProcessor.java

public ResolveProcessor(final String name,PsiElement _place)
{
    myName = name;
    place = _place;
    final boolean b = place instanceof JSReferenceExpression && ((JSReferenceExpression) place).getQualifier() == null;
    allowUnqualifiedStaticsFromInstance = b;

    if(myName != null && place instanceof JSReferenceExpression)
    {
        final ASTNode node = place.getNode().findChildByType(JSTokenTypes.COLON_COLON);
        String explicitNs = null;

        // Todo: e.g. protected is also ns
        if(node != null)
        {
            final JSExpression expression = ((JSReferenceExpression) place).getQualifier();
            if(expression instanceof JSReferenceExpression)
            {
                anyNsAllowed = ((JSReferenceExpression) expression).resolve() instanceof JSVariable;
            }

            explicitNs = expression != null ? expression.getText() : null;
        }
        else
        {
            final JSExpression qualifier = ((JSReferenceExpression) place).getQualifier();

            if(qualifier instanceof JSReferenceExpression && qualifier.getNode().findChildByType(JSTokenTypes.COLON_COLON) != null)
            {
                anyNsAllowed = ((JSReferenceExpression) qualifier).resolve() instanceof JSVariable;
                explicitNs = ((JSReferenceExpression) qualifier).getReferencedname();
            }
        }

        if(explicitNs != null && !anyNsAllowed)
        {
            openednses = new THashSet<String>();
            openednses.add(explicitNs);
            defaultNsIsNotAllowed = true;
        }
    }

    if(myName == null && place instanceof JSReferenceExpression)
    {
        PsiElement parent = place.getParent();

        if(parent instanceof JSReferenceList)
        {
            if(parent.getNode().getElementType() == JSElementTypes.EXTENDS_LIST)
            {
                final PsiElement element = parent.getParent();
                if(element instanceof JSClass)
                {
                    if(((JSClass) element).isInterface())
                    {
                        myAcceptOnlyClasses = false;
                        myAcceptOnlyInterfaces = true;
                    }
                    else
                    {
                        myAcceptOnlyClasses = true;
                        myAcceptOnlyInterfaces = false;
                    }
                }
            }
            else
            {
                myAcceptOnlyClasses = false;
                myAcceptOnlyInterfaces = true;
            }
        }
    }

    ecma = place != null && place.getContainingFile().getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4;
}

项目：consulo-javascript 文件：XmlBackedJSClassImpl.java

public static boolean isInlineComponentTag(XmlTag tag)
{
    return COMPONENT_TAG_NAME.equals(tag.getLocalName()) &&
            JavaScriptSupportLoader.isMxmlNs(tag.getNamespace()) &&
            !(tag.getParent() instanceof XmlDocument);
}

项目：consulo-javascript 文件：JSUnresolvedFunctioninspection.java

static ProblemHighlightType getUnresolveReferenceHighlightType(final @Nullable JSExpression qualifier,@NotNull JSExpression node)
{
    JSClass jsClass;

    final PsiFile containingFile = node.getContainingFile();
    if(qualifier != null)
    {
        jsClass = JSResolveUtil.findClassOfQualifier(qualifier,containingFile);

        if(jsClass == null && (qualifier instanceof JSReferenceExpression))
        {
            ResolveResult[] results = ((JSReferenceExpression) qualifier).multiResolve(false);

            if(results.length != 0)
            {
                PsiElement resultElement = results[0].getElement();
                String type = null;

                if(resultElement instanceof JSVariable)
                {
                    type = ((JSVariable) resultElement).getTypestring();
                }
                else if(resultElement instanceof JSFunction)
                {
                    type = ((JSFunction) resultElement).getReturnTypestring();
                }

                if("*".equals(type))
                {
                    return ProblemHighlightType.LIKE_UNKNowN_SYMBOL;
                }
                jsClass = JSResolveUtil.getClassOfContext(resultElement);
            }
        }
    }
    else
    {
        jsClass = JSResolveUtil.getClassOfContext(node);
    }

    final boolean ecmaL4File = containingFile.getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4;

    if(jsClass != null && ecmaL4File &&
            (!(jsClass instanceof XmlBackedJSClassImpl) || jsClass.getContainingFile().getFileType() == XmlFileType.INSTANCE))
    {
        final JSAttributeList attributeList = jsClass.getAttributeList();
        if(attributeList == null || !attributeList.hasModifier(JSAttributeList.ModifierType.DYNAMIC))
        {
            return ProblemHighlightType.ERROR;
        }
    }

    if(ecmaL4File && jsClass == null && node.getParent() instanceof JSReferenceList)
    {
        return ProblemHighlightType.ERROR;
    }
    return ProblemHighlightType.LIKE_UNKNowN_SYMBOL;
}

项目：consulo-javascript 文件：ECMAScriptImportOptimizer.java

@Override
public boolean supports(PsiFile file)
{
    return file.getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4 || JavaScriptSupportLoader.isFlexMxmFile(file);
}

项目：consulo-javascript 文件：FunctionWithInconsistentReturnsJSinspection.java

@Override
protected ProblemHighlightType getProblemHighlightType(PsiElement location) {
          return location.getContainingFile().getLanguage() == JavaScriptSupportLoader.ECMA_SCRIPT_L4 ?
                 ProblemHighlightType.GENERIC_ERROR:super.getProblemHighlightType(location);
      }

dalvik.system.BaseDexClassLoader.findClass中的java.lang.ClassNotFoundException

这个错误让我发疯.从Google Play商店下载时,我的应用在启动时崩溃并出现以下错误：

java.lang.classNotFoundException
in dalvik.system.BaseDexClassLoader.findClass

在我们的两个设备上使用eclipse构建时,我的应用程序不会崩溃.然而一个月前,一个客户使用他的手机构建我们的应用程序,然后它也在启动时崩溃.我忽略了这个问题,因为它正在我们的设备上工作,并认为它与谷歌地图键或密钥库有关.

现在,当从Play商店下载时,我们的应用程序崩溃了.我知道没有一种简单的方法可以解决这个问题,但是我们会理解正确的方向.

我也发现很难调试这个问题,因为在我们的设备上使用eclipse构建应用程序时效果很好！

这是我报告的完整错误日志：

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.denederlandsewateren.winkeloord/com.denederlandsewateren.views.StartScreenActivity}: java.lang.classNotFoundException: com.denederlandsewateren.views.StartScreenActivity
at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:2099)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2210)
at android.app.ActivityThread.access$600(ActivityThread.java:142)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1208)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4931)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.classNotFoundException: com.denederlandsewateren.views.StartScreenActivity
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
at java.lang.classLoader.loadClass(ClassLoader.java:501)
at java.lang.classLoader.loadClass(ClassLoader.java:461)
at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
at android.app.ActivityThread.performlaunchActivity(ActivityThread.java:2090)
... 11 more

再说一遍,除了对这个问题的直接回答,但也许有人可以对这个错误日志提供的问题有所了解.

编辑

如果有帮助,这是清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.xxxx.xxxxx"
    android:versionCode="1"
    android:versionName="1.0" >

    <permission
        android:name="com.xxxxx.xxxxx.MAPS_RECEIVE"
        android:protectionLevel="signature" />
    <permission
        android:name="com.xxxxx.xxxxx.permission.C2D_MESSAGE"
        android:protectionLevel="signature" />

    <uses-permission android:name="my_app_package.permission.C2D_MESSAGE" />
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="com.xxxxxx.xxxxx.MAPS_RECEIVE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <uses-feature
        android:glEsversion="0x00020000"
        android:required="true" />

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.VIBRATE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/app_icon"
        android:label="@string/app_name"
        android:theme="@style/Theme.Sherlock" >
        <service android:name="com.xxxxxx.xxxxx.GCMIntentService" />

        <Meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="xxxxxxxx" />

        <receiver
            android:name="com.google.android.gcm.GCMbroadcastReceiver"
            android:permission="com.google.android.c2dm.permission.SEND" >
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />

                <category android:name="com.xxxxxx.xxxxxxx" />
            </intent-filter>
        </receiver>

        <activity
            android:name="com.xxxxx.xxxxx.MainActivity"
            android:label="@string/app_name"
            android:screenorientation="portrait">
            <!--<intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter> -->
        </activity>

        <Meta-data
            android:name="com.facebook.sdk.ApplicationId"
            android:value="@string/app_id" />

        <activity android:name="com.facebook.LoginActivity" >
        </activity>
        <activity
            android:name="com.xxxxxx.xxxxxx.StartScreenActivity"
            android:label="@string/app_name" 
            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"
            android:screenorientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

编辑

在设备上安装应用程序时添加了详细日志

03-30 17:56:28.554: D/dalvikvm(5150): GC_FOR_ALLOC freed 233K, 68% free 2639K/8195K, paused 13ms, total 13ms
03-30 17:56:28.574: I/dalvikvm-heap(5150): Grow heap (frag case) to 26.682MB for 16777232-byte allocation
03-30 17:56:28.594: D/dalvikvm(5150): GC_CONCURRENT freed <1K, 23% free 19022K/24647K, paused 2ms+9ms, total 21ms
03-30 17:56:29.114: D/dalvikvm(5150): GC_FOR_ALLOC freed 0K, 23% free 19022K/24647K, paused 15ms, total 15ms
03-30 17:56:29.129: I/dalvikvm-heap(5150): Grow heap (frag case) to 35.681MB for 9437200-byte allocation
03-30 17:56:29.169: D/dalvikvm(5150): GC_CONCURRENT freed 0K, 17% free 28238K/33927K, paused 2ms+2ms, total 38ms
03-30 17:56:29.254: D/libEGL(5150): loaded /system/lib/egl/libEGL_mali.so
03-30 17:56:29.259: D/libEGL(5150): loaded /system/lib/egl/libGLESv1_CM_mali.so
03-30 17:56:29.259: D/libEGL(5150): loaded /system/lib/egl/libGLESv2_mali.so
03-30 17:56:29.284: D/Openglrenderer(5150): Enabling debug mode 0
03-30 17:56:32.154: D/KEY(5150): UUID
03-30 17:56:32.179: I/System.out(5150): UUID: xxxxxxxxxxxxxx
03-30 17:56:32.179: E/SerializeObject(5150): FileNot Found in ReadSettings filename = xxxxx.dat
03-30 17:56:32.184: D/GCMRegistrar(5150): resetting backoff for com.xxxxx.xxxxx
03-30 17:56:32.214: V/GCMRegistrar(5150): Registering app com.xxxxx.xxxxx of senders 752727514714
03-30 17:56:32.214: D/KEY(5150): pushEnabled
03-30 17:56:32.324: V/SlidingMenu(5150): setting padding!
03-30 17:56:32.394: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.394: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.394: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.409: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.414: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.414: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.424: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.424: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.429: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.434: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.434: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.434: W/AllCapsTransformationMethod(5150): Caller did not enable length changes; not transforming text
03-30 17:56:32.459: V/CustomViewBehind(5150): behind INVISIBLE
03-30 17:56:36.894: D/dalvikvm(5150): GC_CONCURRENT freed 20031K, 58% free 15574K/36551K, paused 4ms+7ms, total 49ms
03-30 17:56:36.894: D/dalvikvm(5150): WAIT_FOR_CONCURRENT_GC blocked 31ms
03-30 17:56:37.504: I/System.out(5150): Vaarapp ID: 5
03-30 17:56:37.534: I/Choreographer(5150): Skipped 122 frames!  The application may be doing too much work on its main thread.
03-30 17:56:37.539: V/GCMbroadcastReceiver(5150): onReceive: com.google.android.c2dm.intent.REGISTRATION
03-30 17:56:37.544: V/GCMbroadcastReceiver(5150): GCM IntentService class: com.xxxxx.xxxxx.GCMIntentService
03-30 17:56:37.549: V/GCMBaseIntentService(5150): Acquiring wakelock
03-30 17:56:37.794: V/GCMBaseIntentService(5150): Intent service name: GCMIntentService-DynamicSenderIds-1
03-30 17:56:37.794: E/GCMRegistrar(5150): internal error: retry receiver class not set yet
03-30 17:56:37.794: V/GCMRegistrar(5150): Registering receiver
03-30 17:56:37.799: D/GCMBaseIntentService(5150): handleRegistration: registrationId = xxxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxx-xxxxx-xxxx, error = null, unregistered = null
03-30 17:56:37.799: D/GCMRegistrar(5150): resetting backoff for com.xxxxx.xxxxx
03-30 17:56:37.799: V/GCMRegistrar(5150): Saving regId on app version 1
03-30 17:56:37.829: V/GCMBaseIntentService(5150): Releasing wakelock
03-30 17:56:39.169: D/dalvikvm(5150): GC_CONCURRENT freed 2248K, 52% free 17830K/36551K, paused 6ms+12ms, total 95ms
03-30 17:56:39.169: D/dalvikvm(5150): WAIT_FOR_CONCURRENT_GC blocked 12ms
03-30 17:56:39.174: D/dalvikvm(5150): WAIT_FOR_CONCURRENT_GC blocked 48ms
03-30 17:56:41.164: I/dalvikvm(5150): Jit: resizing JitTable from 4096 to 8192
03-30 17:56:42.229: D/dalvikvm(5150): GC_CONCURRENT freed 4265K, 49% free 18778K/36551K, paused 3ms+6ms, total 58ms
03-30 17:56:42.229: D/dalvikvm(5150): WAIT_FOR_CONCURRENT_GC blocked 41ms
03-30 17:56:42.234: D/dalvikvm(5150): WAIT_FOR_CONCURRENT_GC blocked 46ms
03-30 17:57:51.759: D/dalvikvm(5150): GC_CONCURRENT freed 5476K, 49% free 18775K/36551K, paused 21ms+6ms, total 196ms

解决方法:

因此ProGuard确实从我的项目中剥离了代码.我使用ActionBarSherlock和facebook,这是我添加的,所以它会工作：

# ActionBarSherlock 

-keep class android.support.** { *; } 

-keep interface android.support.** { *; } 

-keep class com.actionbarsherlock.** { *; } 

-keep interface com.actionbarsherlock.** { *; } 




# Keep line numbers to alleviate debugging stack traces 

-renamesourcefileattribute SourceFile 

-keepattributes SourceFile,LineNumberTable

这适用于Facebook：

-keepclassmembers class * implements java.io.Serializable
{
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    private void writeObject(java.io.ObjectOutputStream);
    private void readobject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}

关于跨ClassLoader的Java 8 ScriptEngine和java跨类调用的介绍现已完结，谢谢您的耐心阅读，如果想了解更多关于android – dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)中的类加载错误？、ClassLoader.loadClass() throws java.lang.ClassNotFoundException、com.intellij.lang.javascript.JavaScriptSupportLoader的实例源码、dalvik.system.BaseDexClassLoader.findClass中的java.lang.ClassNotFoundException的相关知识，请在本站寻找。

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