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社区首页 >问答首页 >在Android中使用Janino时，弹出了这个错误...有没有办法解决这个问题？

问在Android中使用Janino时，弹出了这个错误...有没有办法解决这个问题？
EN

Stack Overflow用户
提问于 2014-06-17 06:37:13
回答 1查看 457关注 0票数 1

以下是触发该问题的代码。这里的代码使用janino创建一个编译器。我假设这个错误主要与post Java.lang.ClassnotFound底部的字符串语句有关

代码语言：javascript
复制
  //---------------------------------------------------------
    CompilerFactory compilerFactory = new CompilerFactory();
    ISimpleCompiler SimpI = compilerFactory.newSimpleCompiler();
    SimpI.cook("public class test{"
            + "public static int main(String[] args){"
            + "System.out.println(\"test\");"
            + "return 2 + 2;"
            + "}"
            + "}");
代码语言：javascript
复制
06-16 17:31:55.308    5243-5243/mandj.appbuildin.codingcoach.innovo D/AndroidRuntime﹕ Shutting down VM
06-16 17:31:55.308    5243-5243/mandj.appbuildin.codingcoach.innovo W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x418afc08)
06-16 17:31:55.323    5243-5243/mandj.appbuildin.codingcoach.innovo E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: mandj.appbuildin.codingcoach.innovo, PID: 5243
    java.lang.IllegalStateException: Could not execute method of the activity
            at android.view.View$1.onClick(View.java:3969)
            at android.view.View.performClick(View.java:4640)
            at android.view.View$PerformClick.run(View.java:19421)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5476)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3964)
            at android.view.View.performClick(View.java:4640)
            at android.view.View$PerformClick.run(View.java:19421)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5476)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: org.codehaus.commons.compiler.CompileException: Line 1, Column 48: String
            at org.codehaus.janino.UnitCompiler.findTypeByName(UnitCompiler.java:6809)
            at org.codehaus.janino.UnitCompiler.getType2(UnitCompiler.java:5255)
            at org.codehaus.janino.UnitCompiler.access$12600(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$16.visitReferenceType(UnitCompiler.java:5101)
            at org.codehaus.janino.Java$ReferenceType.accept(Java.java:2884)
            at org.codehaus.janino.UnitCompiler.getType(UnitCompiler.java:5141)
            at org.codehaus.janino.UnitCompiler.getType2(UnitCompiler.java:5367)
            at org.codehaus.janino.UnitCompiler.access$12400(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$16.visitArrayType(UnitCompiler.java:5099)
            at org.codehaus.janino.Java$ArrayType.accept(Java.java:2958)
            at org.codehaus.janino.UnitCompiler.getType(UnitCompiler.java:5141)
            at org.codehaus.janino.UnitCompiler.access$16700(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$31.getParameterTypes(UnitCompiler.java:8449)
            at org.codehaus.janino.IClass$IMethod.getDescriptor(IClass.java:1025)
            at org.codehaus.janino.IClass.getIMethods(IClass.java:211)
            at org.codehaus.janino.IClass.getIMethods(IClass.java:199)
            at org.codehaus.janino.UnitCompiler.compile2(UnitCompiler.java:405)
            at org.codehaus.janino.UnitCompiler.compile2(UnitCompiler.java:389)
            at org.codehaus.janino.UnitCompiler.access$400(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$2.visitPackageMemberClassDeclaration(UnitCompiler.java:343)
            at org.codehaus.janino.Java$PackageMemberClassDeclaration.accept(Java.java:1136)
            at org.codehaus.janino.UnitCompiler.compile(UnitCompiler.java:350)
            at org.codehaus.janino.UnitCompiler.compileUnit(UnitCompiler.java:318)
            at org.codehaus.janino.SimpleCompiler.compileToClassLoader(SimpleCompiler.java:346)
            at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java:189)
            at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java:180)
            at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:78)
            at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:71)
            at mandj.appbuildin.codingcoach.innovo.BooleanLogicOne.onClick(BooleanLogicOne.java:64)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3964)
            at android.view.View.performClick(View.java:4640)
            at android.view.View$PerformClick.run(View.java:19421)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5476)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.ClassNotFoundException: String
            at java.lang.Class.classForName(Native Method)
            at java.lang.Class.forName(Class.java:251)
            at org.codehaus.janino.ClassLoaderIClassLoader.findIClass(ClassLoaderIClassLoader.java:78)
            at org.codehaus.janino.IClassLoader.loadIClass(IClassLoader.java:254)
            at org.codehaus.janino.UnitCompiler.findTypeByName(UnitCompiler.java:6805)
            at org.codehaus.janino.UnitCompiler.getType2(UnitCompiler.java:5255)
            at org.codehaus.janino.UnitCompiler.access$12600(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$16.visitReferenceType(UnitCompiler.java:5101)
            at org.codehaus.janino.Java$ReferenceType.accept(Java.java:2884)
            at org.codehaus.janino.UnitCompiler.getType(UnitCompiler.java:5141)
            at org.codehaus.janino.UnitCompiler.getType2(UnitCompiler.java:5367)
            at org.codehaus.janino.UnitCompiler.access$12400(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$16.visitArrayType(UnitCompiler.java:5099)
            at org.codehaus.janino.Java$ArrayType.accept(Java.java:2958)
            at org.codehaus.janino.UnitCompiler.getType(UnitCompiler.java:5141)
            at org.codehaus.janino.UnitCompiler.access$16700(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$31.getParameterTypes(UnitCompiler.java:8449)
            at org.codehaus.janino.IClass$IMethod.getDescriptor(IClass.java:1025)
            at org.codehaus.janino.IClass.getIMethods(IClass.java:211)
            at org.codehaus.janino.IClass.getIMethods(IClass.java:199)
            at org.codehaus.janino.UnitCompiler.compile2(UnitCompiler.java:405)
            at org.codehaus.janino.UnitCompiler.compile2(UnitCompiler.java:389)
            at org.codehaus.janino.UnitCompiler.access$400(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$2.visitPackageMemberClassDeclaration(UnitCompiler.java:343)
            at org.codehaus.janino.Java$PackageMemberClassDeclaration.accept(Java.java:1136)
            at org.codehaus.janino.UnitCompiler.compile(UnitCompiler.java:350)
            at org.codehaus.janino.UnitCompiler.compileUnit(UnitCompiler.java:318)
            at org.codehaus.janino.SimpleCompiler.compileToClassLoader(SimpleCompiler.java:346)
            at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java:189)
            at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java:180)
            at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:78)
            at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:71)
            at mandj.appbuildin.codingcoach.innovo.BooleanLogicOne.onClick(BooleanLogicOne.java:64)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3964)
            at android.view.View.performClick(View.java:4640)
            at android.view.View$PerformClick.run(View.java:19421)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5476)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NoClassDefFoundError: String
            at java.lang.Class.classForName(Native Method)
            at java.lang.Class.forName(Class.java:251)
            at org.codehaus.janino.ClassLoaderIClassLoader.findIClass(ClassLoaderIClassLoader.java:78)
            at org.codehaus.janino.IClassLoader.loadIClass(IClassLoader.java:254)
            at org.codehaus.janino.UnitCompiler.findTypeByName(UnitCompiler.java:6805)
            at org.codehaus.janino.UnitCompiler.getType2(UnitCompiler.java:5255)
            at org.codehaus.janino.UnitCompiler.access$12600(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$16.visitReferenceType(UnitCompiler.java:5101)
            at org.codehaus.janino.Java$ReferenceType.accept(Java.java:2884)
            at org.codehaus.janino.UnitCompiler.getType(UnitCompiler.java:5141)
            at org.codehaus.janino.UnitCompiler.getType2(UnitCompiler.java:5367)
            at org.codehaus.janino.UnitCompiler.access$12400(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$16.visitArrayType(UnitCompiler.java:5099)
            at org.codehaus.janino.Java$ArrayType.accept(Java.java:2958)
            at org.codehaus.janino.UnitCompiler.getType(UnitCompiler.java:5141)
            at org.codehaus.janino.UnitCompiler.access$16700(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$31.getParameterTypes(UnitCompiler.java:8449)
            at org.codehaus.janino.IClass$IMethod.getDescriptor(IClass.java:1025)
            at org.codehaus.janino.IClass.getIMethods(IClass.java:211)
            at org.codehaus.janino.IClass.getIMethods(IClass.java:199)
            at org.codehaus.janino.UnitCompiler.compile2(UnitCompiler.java:405)
            at org.codehaus.janino.UnitCompiler.compile2(UnitCompiler.java:389)
            at org.codehaus.janino.UnitCompiler.access$400(UnitCompiler.java:182)
            at org.codehaus.janino.UnitCompiler$2.visitPackageMemberClassDeclaration(UnitCompiler.java:343)
            at org.codehaus.janino.Java$PackageMemberClassDeclaration.accept(Java.java:1136)
            at org.codehaus.janino.UnitCompiler.compile(UnitCompiler.java:350)
            at org.codehaus.janino.UnitCompiler.compileUnit(UnitCompiler.java:318)
            at org.codehaus.janino.SimpleCompiler.compileToClassLoader(SimpleCompiler.java:346)
            at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java:189)
            at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java:180)
            at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:78)
            at org.codehaus.commons.compiler.Cookable.cook(Cookable.java:71)
            at mandj.appbuildin.codingcoach.innovo.BooleanLogicOne.onClick(BooleanLogicOne.java:64)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3964)
            at android.view.View.performClick(View.java:4640)
            at android.view.View$PerformClick.run(View.java:19421)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5476)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
            at dalvik.`enter code here`system.NativeStart.main(Native Method)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "String" on path: DexPathList[[zip file "/data/app/mandj.appbuildin.codingcoach.innovo-79.apk"],nativeLibraryDirectories=[/data/app-lib/mandj.appbuildin.codingcoach.innovo-79, /vendor/lib, /system/lib]]
            at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.
java
android
compiler-errors
janino
EN

回答 1

Stack Overflow用户

发布于 2015-01-26 01:22:17

编辑：我仔细阅读了你的堆栈跟踪，最后指出dalvik找不到类String。如果是这样，那么忽略下面的整个部分，简单地将dalvik寻找的类引入到类加载器中。我认为您可以通过使用[SimpleCompiler.setParentClassLoader()][1]引入父类加载器来做到这一点

下面的整体部分

构建APK时，Android SDK工具实际上会将您最喜欢的java编译器输出的字节码转换为dalvik兼容格式(dex)。

因此，为了解决这个问题，您正在寻找一种在运行janino输出之前对其进行后处理的方法。这可能真的很复杂。首先，如何说服janino输出.class文件，而不是直接加载它们？实际上，我是从谷歌来到这里，试图了解更多关于这方面的信息。

其次，当Android SDK转换为dex格式时，如何在实际的Android设备本身上运行相同的转换过程

我将以目前为止最好的两条线索来结束：UnitCompiler和dex-tools。祝好运!

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/24253261

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