带有AppCompat的Unity Android拒绝对先前失败的类java.lang.Class进行重新初始化 [英] Unity Android with AppCompat Rejecting re-init on previously-failed class java.lang.Class

问题描述

我正在构建一个使用Android库作为插件之一的Unity应用.该Android库使用AppCompat.

Hi I am building a Unity app which uses Android library as one of the plugin. This Android library uses AppCompat.

在阅读Unity博客时，我意识到由于多种原因(主要是APK大小)，在构建期间Unity不包含appcompat库，但是它仍然允许手动添加该库. (此处的博客: http://blogs.unity3d.com/2015/07/16/android-themes-in-unity/)

Reading from the Unity blog, I realized that Unity does not include the appcompat library during the building due to several reasons (mainly the APK size) but it still allow the library to be added manually. (blog here: http://blogs.unity3d.com/2015/07/16/android-themes-in-unity/)

因此，我已将库添加到Assets/Plugins/Android/中，然后我的Unity应用程序就可以成功构建并生成APK文件.

Thus I've added the library inside Assets/Plugins/Android/ which then my Unity app is able to build successfully and generate the APK file.

当我尝试打开应用程序时出现了问题，该应用程序应该启动了在android库中定义的活动.此特定活动使用appcompat库.我从logcat收到以下错误消息

The problem comes when I tried to open the app which supposedly start an activity that was defined in the android library. This particular activity uses appcompat library. I get the following error message from logcat

I/art     (19482): Rejecting re-init on previously-failed class java.lang.Class<android.support.v7.app.AppCompatActivity>
I/art     (19482): Rejecting re-init on previously-failed class java.lang.Class<android.support.v7.app.AppCompatActivity>
W/ActivityManager(  890):   Force finishing activity amillardo.test.blasterescopic/com.test.player.MainActivity
I/art     (19482): Rejecting re-init on previously-failed class java.lang.Class<android.support.v7.app.ActionBarActivity>
I/art     (19482): Rejecting re-init on previously-failed class java.lang.Class<android.support.v7.app.ActionBarActivity>
I/art     (19482): Rejecting re-init on previously-failed class java.lang.Class<com.test.player.MainActivity>
E/AndroidRuntime(19482): FATAL EXCEPTION: main
E/AndroidRuntime(19482): Process: amillardo.test.blasterescopic, PID: 19482
E/AndroidRuntime(19482): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{amillardo.test.blasterescopic/com.test.player.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.test.player.MainActivity" on path: DexPathList[[zip file "/data/app/amillardo.test.blasterescopic-1/base.apk"],nativeLibraryDirectories=[/data/app/amillardo.test.blasterescopic-1/lib/arm, /system/lib, /vendor/lib, system/vendor/lib, system/vendor/lib/egl, system/lib/hw]]
E/AndroidRuntime(19482):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2322)
E/AndroidRuntime(19482):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2474)
E/AndroidRuntime(19482):     at android.app.ActivityThread.access$800(ActivityThread.java:144)
E/AndroidRuntime(19482):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1359)
E/AndroidRuntime(19482):     at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime(19482):     at android.os.Looper.loop(Looper.java:155)
E/AndroidRuntime(19482):     at android.app.ActivityThread.main(ActivityThread.java:5696)
E/AndroidRuntime(19482):     at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(19482):     at java.lang.reflect.Method.invoke(Method.java:372)
E/AndroidRuntime(19482):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028)
E/AndroidRuntime(19482):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
E/AndroidRuntime(19482): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.test.player.MainActivity" on path: DexPathList[[zip file "/data/app/amillardo.test.blasterescopic-1/base.apk"],nativeLibraryDirectories=[/data/app/amillardo.test.blasterescopic-1/lib/arm, /system/lib, /vendor/lib, system/vendor/lib, system/vendor/lib/egl, system/lib/hw]]
E/AndroidRuntime(19482):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
E/AndroidRuntime(19482):     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
E/AndroidRuntime(19482):     at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
E/AndroidRuntime(19482):     at android.app.Instrumentation.newActivity(Instrumentation.java:1083)
E/AndroidRuntime(19482):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2312)
E/AndroidRuntime(19482):     ... 10 more
E/AndroidRuntime(19482):     Suppressed: java.lang.NoClassDefFoundError: com.test.player.MainActivity
E/AndroidRuntime(19482):         at dalvik.system.DexFile.defineClassNative(Native Method)
E/AndroidRuntime(19482):         at dalvik.system.DexFile.defineClass(DexFile.java:226)
E/AndroidRuntime(19482):         at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:219)
E/AndroidRuntime(19482):         at dalvik.system.DexPathList.findClass(DexPathList.java:321)
E/AndroidRuntime(19482):         at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:54)
E/AndroidRuntime(19482):         ... 14 more
E/AndroidRuntime(19482):     Suppressed: java.lang.ClassNotFoundException: com.test.player.MainActivity
E/AndroidRuntime(19482):         at java.lang.Class.classForName(Native Method)
E/AndroidRuntime(19482):         at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
E/AndroidRuntime(19482):         at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
E/AndroidRuntime(19482):         at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
E/AndroidRuntime(19482):         ... 13 more
E/AndroidRuntime(19482):     Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
I/TrimMemoryManager( 1561): [trimMemory] 20
E/ActivityManager(  890): App crashed! Process: amillardo.test.blasterescopic

是的，我被困在这里.有人有什么建议吗?谢谢！

So yup I am stuck here. Anyone has any suggestion? Thanks!

推荐答案

在尝试了所有可以想到的方法之后，我终于使它工作了！

I finally got it working after trying all methods I can think of!

我怀疑是因为appcompat库实际上需要或依赖于support-v4库.

I suspect it is because the appcompat library actually requires or dependent on support-v4 library.

最初，我仅将android sdk中的appcompat库导入到我的unity项目中.但是当我导入support-v4库时，错误不再存在！

Initially I only imported the appcompat library from android sdk to my unity project. But when I imported the support-v4 library, the errors are no longer there!

所以希望这对需要它的人有所帮助.

So hope this helps anyone who need it.

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