我在将自定义类传递给另一个 Activity 时遇到问题，导致 Activity 管理器崩溃。我有这样一个类:
public class MyClass implements Serializable/Parcelable {
public final String a;
public final Long b;
public final Boolean c;
}
Intent intent = new Intent(getActivity(), TargetActivity.class);
Bundle parameter = new Bundle();
parameter.putParcelable(TargetActivity.DATA_KEY, instance_of_my_class);
startActivity(intent, parameter);
我已经尝试了 Serializable 和 Parcelable 两种方法都失败了，并出现了同样的问题:ClassNotFoundException。
有一些关于此的旧讨论，其中推荐使用 setClassLoader 和 setExtrasClassLoader，不幸的是它不起作用。例如，我尝试了 parameter.setClassLoader(getClass().getClassLoader()); 结果是一样的。
有人知道解决办法吗？第三方图书馆是否有可能对此产生影响？ (我项目中有EventBus)
Parcelable 案例中的堆栈跟踪如下所示:
08-23 14:40:37.086 1487-1783/system_process E/Parcel: Class not found when unmarshalling: com.example.MyClass
java.lang.ClassNotFoundException: com.example.MyClass
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:309)
at java.lang.Class.forName(Class.java:273)
at android.os.Parcel.readParcelableCreator(Parcel.java:2281)
at android.os.Parcel.readParcelable(Parcel.java:2245)
at android.os.Parcel.readValue(Parcel.java:2152)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2485)
at android.os.BaseBundle.unparcel(BaseBundle.java:221)
at android.os.BaseBundle.getString(BaseBundle.java:918)
at android.app.ActivityOptions.<init>(ActivityOptions.java:570)
at com.android.server.am.ActivityRecord.<init>(ActivityRecord.java:417)
at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:1482)
at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:951)
at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:3369)
at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:3356)
at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:139)
at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:2208)
at android.os.Binder.execTransact(Binder.java:446)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.MyClass" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:309)
at java.lang.Class.forName(Class.java:273)
at android.os.Parcel.readParcelableCreator(Parcel.java:2281)
at android.os.Parcel.readParcelable(Parcel.java:2245)
at android.os.Parcel.readValue(Parcel.java:2152)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2485)
at android.os.BaseBundle.unparcel(BaseBundle.java:221)
at android.os.BaseBundle.getString(BaseBundle.java:918)
at android.app.ActivityOptions.<init>(ActivityOptions.java:570)
at com.android.server.am.ActivityRecord.<init>(ActivityRecord.java:417)
at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:1482)
at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:951)
at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:3369)
at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:3356)
at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:139)
at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:2208)
at android.os.Binder.execTransact(Binder.java:446)
Suppressed: java.lang.ClassNotFoundException: com.example.MyClass
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 19 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
最佳答案
Classes implementing the Parcelable interface must also have a non-null static field called CREATOR of a type that implements the Parcelable.Creator interface.
引用:https://developer.android.com/reference/android/os/Parcelable.html
为了以一种简单的方式做到这一点，请尝试找到可以处理可打包创建的插件。 例子: https://github.com/mcharmas/android-parcelable-intellij-plugin
关于android - 在 Bundle 中传递对象 - ClassNotFoundException，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39101829/