如何避免NoClassDefFoundError:pre-L上的android/os/PersistableBundle? [英] How to avoid a NoClassDefFoundError: android/os/PersistableBundle on pre-L?

问题描述

我使用 TinyBus 库在我的应用程序中调度事件.MinSDK是15，编译SDK是23.

I use the TinyBus library to dispatch events in my app. MinSDK is 15, compile SDK is 23.

在21之前的设备上，我面临的问题似乎会影响许多使用反射的应用程序.尝试在基础 Activity 类(从 AppCompatActivity 继承)中在总线上注册后，我得到以下崩溃日志:

On pre-21 devices, I'm facing the issue which seems to affect many apps that use reflection. As soon as I try to register on the bus in my base Activity class (which inherits from the AppCompatActivity), I get the following crash log:

E/AndroidRuntime: java.lang.NoClassDefFoundError: android/os/PersistableBundle
E/AndroidRuntime:     at java.lang.Class.getDeclaredMethods(Native Method)
E/AndroidRuntime:     at java.lang.Class.getPublicMethodsRecursive(Class.java:955)
E/AndroidRuntime:     at java.lang.Class.getMethods(Class.java:938)
E/AndroidRuntime:     at de.halfbit.tinybus.impl.ObjectsMeta.<init>(ObjectsMeta.java:58)
E/AndroidRuntime:     at de.halfbit.tinybus.TinyBus.processQueue(TinyBus.java:346)
E/AndroidRuntime:     at de.halfbit.tinybus.TinyBus.register(TinyBus.java:178)
E/AndroidRuntime:     at com.package.name.activities.InitializedActivity.onStart(InitializedActivity.java:62)
E/AndroidRuntime:     at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1166)
E/AndroidRuntime:     at android.app.Activity.performStart(Activity.java:5264)
E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2047)
E/AndroidRuntime:     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2099)
E/AndroidRuntime:     at android.app.ActivityThread.access$600(ActivityThread.java:138)
E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:4929)
E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:798)
E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:565)
E/AndroidRuntime:     at dalvik.system.NativeStart.main(Native Method)

我知道此错误是由dalvik未能初始化在 dex 文件中找不到的类引起的.有很多与此问题相关的信息和问题(因为它也会影响到Otto和其他人)，但是到目前为止，我只看到一个解决方法:从应用程序中删除 PersistableBundle 的用法.但是， 我没有在我的代码中的任何地方引用 PersistableBundle ，但是系统显然会引用.

I know that this error is caused by dalvik failing to initialize a class it can't find in the dex file. There is a lot of info and questions related to this issue (since it also affects Otto and others), but so far I have only seen one fix: remove the usage of PersistableBundle from the app. However, I do not reference PersistableBundle anywhere in my code, but the system apparently does.

是否有其他已知的解决方法?

Is there any other known fix to the problem?

推荐答案

好，此问题现已解决.浏览完我所有的代码(应该已经很久了)之后，我发现实际上我有 对 PersistableBundle 的引用.这些位于我让IDE生成的方法，例如 onPostCreate(PersistableBundle bundle)，并且没有引起注意.用 Bundle 替换所有 PersistableBundle 可以解决此问题.

Well, the issue is resolved now. After going through all of my code (which I should have done ages ago) I found out that I actually had references to the PersistableBundle. Those were located in methods I let the IDE generate like onPostCreate(PersistableBundle bundle) and wasn't paying attention to. Replacing all PersistableBundle with Bundle fixed the problem.

对于遇到类似问题的人们，我只能建议在使用更新的API时仔细查看生成的内容.

To folks having similar issue I can only suggest looking closely at the generated stuff when using newer API.

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