Android 4.4.4上的FlexJson ClassNotFound异常 [英] FlexJson ClassNotFound Exception on Android 4.4.4

问题描述

我有一个用于Android设备的multidex项目.我使用Flexjson.我已经用flexjson 3.3和2.x对其进行了测试.

I´ve got a multidex project for Android devices. I use Flexjson. I´ve already tested it with flexjson 3.3 and 2.x.

它与android 5.x完美兼容，但在Android 4.4.4中崩溃.

It works perfectly well with android 5.x but crashes in Android 4.4.4.

Dex支持库似乎无法与较旧的Android版本配合使用，但我无法确定.

It looks like the Dex support library is not working propperly with older Android versions but I cannot tell.

这是我的堆栈跟踪:

 06-29 03:50:44.763  11884-11884/com.pigdroid.gameboard E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.pigdroid.gameboard, PID: 11884
    flexjson.JSONException: [ layers.values ]:  Could not load com.pigdroid.game.board.tile.model.IntTileLayer
            at flexjson.ObjectBinder.findClassInMap(ObjectBinder.java:250)
            at flexjson.ObjectBinder.findClassName(ObjectBinder.java:213)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:92)
            at flexjson.ObjectBinder.bindIntoCollection(ObjectBinder.java:110)
            at flexjson.factories.ListObjectFactory.instantiate(ListObjectFactory.java:13)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:95)
            at flexjson.ObjectBinder.bindIntoObject(ObjectBinder.java:149)
            at flexjson.factories.ExistingObjectFactory.instantiate(ExistingObjectFactory.java:25)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:95)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:74)
            at flexjson.JSONDeserializer.deserialize(JSONDeserializer.java:241)
            at flexjson.JSONDeserializer.deserializeInto(JSONDeserializer.java:301)
            at com.pigdroid.game.model.memento.UndoableObject.from(UndoableObject.java:35)
            at com.pigdroid.game.controller.GameController.loadModelFromSerialized(GameController.java:108)
            at com.pigdroid.gameboard.view.detail.game.tile.TileBoardGameFragmentController.setGame(TileBoardGameFragmentController.java:692)
            at com.pigdroid.gameboard.view.detail.game.GameDetailFragment.onKickOff(GameDetailFragment.java:168)
            at com.pigdroid.gameboard.view.ServiceFragment.kickOffIf(ServiceFragment.java:71)
            at com.pigdroid.gameboard.view.detail.game.GameDetailFragment.kickOffIf(GameDetailFragment.java:159)
            at com.pigdroid.gameboard.view.ServiceFragment$3.bound(ServiceFragment.java:52)
            at com.pigdroid.gameboard.view.ServiceFragment$3.bound(ServiceFragment.java:48)
            at com.pigdroid.android.hateaidl.HateAIDLConnection$3.onServiceConnected(HateAIDLConnection.java:118)
            at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1101)
            at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1118)
            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:5001)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "com.pigdroid.game.board.tile.model.IntTileLayer" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/system/lib]]
            at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
            at android.app.LoadedApk$WarningContextClassLoader.loadClass(LoadedApk.java:430)
            at flexjson.ObjectBinder.findClassInMap(ObjectBinder.java:243)
            at flexjson.ObjectBinder.findClassName(ObjectBinder.java:213)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:92)
            at flexjson.ObjectBinder.bindIntoCollection(ObjectBinder.java:110)
            at flexjson.factories.ListObjectFactory.instantiate(ListObjectFactory.java:13)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:95)
            at flexjson.ObjectBinder.bindIntoObject(ObjectBinder.java:149)
            at flexjson.factories.ExistingObjectFactory.instantiate(ExistingObjectFactory.java:25)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:95)
            at flexjson.ObjectBinder.bind(ObjectBinder.java:74)
            at flexjson.JSONDeserializer.deserialize(JSONDeserializer.java:241)
            at flexjson.JSONDeserializer.deserializeInto(JSONDeserializer.java:301)
            at com.pigdroid.game.model.memento.UndoableObject.from(UndoableObject.java:35)
            at com.pigdroid.game.controller.GameController.loadModelFromSerialized(GameController.java:108)
            at com.pigdroid.gameboard.view.detail.game.tile.TileBoardGameFragmentController.setGame(TileBoardGameFragmentController.java:692)
            at com.pigdroid.gameboard.view.detail.game.GameDetailFragment.onKickOff(GameDetailFragment.java:168)
            at com.pigdroid.gameboard.view.ServiceFragment.kickOffIf(ServiceFragment.java:71)
            at com.pigdroid.gameboard.view.detail.game.GameDetailFragment.kickOffIf(GameDetailFragment.java:159)
            at com.pigdroid.gameboard.view.ServiceFragment$3.bound(ServiceFragment.java:52)
            at com.pigdroid.gameboard.view.ServiceFragment$3.bound(ServiceFragment.java:48)
            at com.pigdroid.android.hateaidl.HateAIDLConnection$3.onServiceConnected(HateAIDLConnection.java:118)
            at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1101)
            at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1118)
            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:5001)
            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:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)

编辑:我向Android开发团队填补了一个问题，他们注意到该bug是一项功能，即使该功能在以后的版本中也能很好地工作.如果发现有任何问题，请尝试重新投票: https://code.google.com/p/android/issues/detail?id=178607

I´ve filled an issue to the Android dev team and they´ve noted the bug as a feature, even when it works perfectly well on latter versions. If any found this anoying, please try to vote for reopening: https://code.google.com/p/android/issues/detail?id=178607

推荐答案

我查看了失败的方法ObjectBinder.findClassInMap，他们得到了如下所示的类加载器:ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

I´ve taken a look to the method failing ObjectBinder.findClassInMap they get the Class loader like this: ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

我想multi dex类加载器安装不好，因为我在反序列化发生之前就自己设置了加载器，并解决了这个问题.

I suppose there´s kind of a bad install of the multi dex class loader because I´ve set the loader myself before my deserialization occurs and it fixed the problem.

行修正'我在加载游戏模型之前添加的错误是这样的:

The line fixin' the error I´ve added just before loading my game model goes like this:

    Thread.currentThread().setContextClassLoader(owner.getActivity().getBaseContext().getClassLoader());

这篇关于Android 4.4.4上的FlexJson ClassNotFound异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！