ClassNotFoundException在恢复GoogleMaps对象状态时

Question

当从活动返回后尝试恢复我的GoogleMap（mapView）对象的状态时，我的应用程序一直崩溃。 mapView位于定制的Support lib v4 Fragment（MyFragment）中，它本身嵌入在AppCompatActivity（MyActivity）中。这些组件的设置是正常的。我的设备是开发人员配置的，可以在推送时销毁所有的Activity。

在压入和弹出另一个Activity，我Fragment的onCreateView(LayoutInflater, ViewGroup, Bundle state)方法被调用，并在

mapView.onCreate(state); 

崩溃在底部产生的痕迹。

碰撞确实不是发生在第一次创建时state是null。通过启用或禁用MultiDex或Proguard的任何组合（我可以找到）都无法解决崩溃问题。

事实上，我能做的唯一工作就是启用即时运行并直接从Android Studio运行。在这种情况下，一切都很好。如果“即时运行”被禁用，并且我从Android Studio运行，则会出现崩溃。

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更新：

在过去的一周，谷歌发布Android构建工具V5.0.1，和谷歌播放服务V10.0。更新后，这个问题似乎已经清除了。我会留下这个问题，但要记录下来看看是否有其他想法。下面的Aлекс的想法是我可以尝试的一个好主意。

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11-11 13:37:42.165 18389 18389 E Parcel : Class not found when unmarshalling: android.support.v7.widget.LinearLayoutManager$SavedState 
11-11 13:37:42.165 18389 18389 E Parcel : java.lang.ClassNotFoundException: android.support.v7.widget.LinearLayoutManager$SavedState 
11-11 13:37:42.165 18389 18389 E Parcel : at java.lang.Class.classForName(Native Method) 
11-11 13:37:42.165 18389 18389 E Parcel : at java.lang.Class.forName(Class.java:324) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Parcel.readParcelableCreator(Parcel.java:2404) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Parcel.readParcelable(Parcel.java:2358) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Parcel.readValue(Parcel.java:2264) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Parcel.readArrayMapInternal(Parcel.java:2614) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.BaseBundle.unparcel(BaseBundle.java:221) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Bundle.getBundle(Bundle.java:763) 
11-11 13:37:42.165 18389 18389 E Parcel : at aby.a(:com.google.android.gms.DynamiteModulesB:74) 
11-11 13:37:42.165 18389 18389 E Parcel : at maps.ad.t.a(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at maps.ad.R.a(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at xx.onTransact(:com.google.android.gms.DynamiteModulesB:66) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Binder.transact(Binder.java:387) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.maps.internal.IMapViewDelegate$zza$zza.onCreate(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.maps.MapView$zza.onCreate(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.dynamic.zza$3.zzb(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.dynamic.zza$1.zza(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.maps.MapView$zzb.zzbsp(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.maps.MapView$zzb.zza(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.dynamic.zza.zza(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.dynamic.zza.onCreate(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.gms.maps.MapView.onCreate(Unknown Source) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.myco.myapp.MyFragment.onCreateView(MyFragment.java:235) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v4.app.Fragment.performCreateView(Fragment.java:2087) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1113) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1295) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1277) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:2154) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:201) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:603) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:181) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.myco.myapp.main.MainActivity.onStart(MainActivity.java:176) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1266) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.app.Activity.performStart(Activity.java:6916) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3218) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3351) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.app.ActivityThread.access$1100(ActivityThread.java:222) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1796) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Handler.dispatchMessage(Handler.java:102) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.os.Looper.loop(Looper.java:158) 
11-11 13:37:42.165 18389 18389 E Parcel : at android.app.ActivityThread.main(ActivityThread.java:7230) 
11-11 13:37:42.165 18389 18389 E Parcel : at java.lang.reflect.Method.invoke(Native Method) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
11-11 13:37:42.165 18389 18389 E Parcel : Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v7.widget.LinearLayoutManager$SavedState" on path: DexPathList[[zip file "/data/data/com.google.android.gms/app_chimera/m/00000018/DynamiteModulesB_GmsCore_prodmnc_hdpi_release.apk"],nativeLibraryDirectories=[/data/user/0/com.google.android.gms/app_chimera/m/00000018/n/armeabi-v7a, /data/user/0/com.google.android.gms/app_chimera/m/00000018/n/armeabi, /vendor/lib, /system/lib]] 
11-11 13:37:42.165 18389 18389 E Parcel : at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
11-11 13:37:42.165 18389 18389 E Parcel : at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
11-11 13:37:42.165 18389 18389 E Parcel : at com.google.android.chimera.container.internal.DelegateLastPathClassLoader.loadClass(:com.google.android.gms:34) 
11-11 13:37:42.165 18389 18389 E Parcel : at java.lang.ClassLoader.loadClass(ClassLoader.java:469) 
11-11 13:37:42.165 18389 18389 E Parcel : ... 44 more 
11-11 13:37:42.165 18389 18389 E Parcel : Suppressed: java.lang.ClassNotFoundException: android.support.v7.widget.LinearLayoutManager$SavedState 
11-11 13:37:42.165 18389 18389 E Parcel :  at java.lang.Class.classForName(Native Method) 
11-11 13:37:42.165 18389 18389 E Parcel :  at java.lang.BootClass 
11-11 13:37:42.170 18389 18389 D AndroidRuntime: Shutting down VM 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: FATAL EXCEPTION: main 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: Process: com.myco.myapp, PID: 18389 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myco.myapp/com.myco.myapp.main.MainActivity}: android.os.BadParcelableException: ClassNotFoundException when unmarshalling: android.support.v7.widget.LinearLayoutManager$SavedState 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3255) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3351) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.ActivityThread.access$1100(ActivityThread.java:222) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1796) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Looper.loop(Looper.java:158) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:7230) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: Caused by: android.os.BadParcelableException: ClassNotFoundException when unmarshalling: android.support.v7.widget.LinearLayoutManager$SavedState 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Parcel.readParcelableCreator(Parcel.java:2432) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Parcel.readParcelable(Parcel.java:2358) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Parcel.readValue(Parcel.java:2264) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Parcel.readArrayMapInternal(Parcel.java:2614) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.BaseBundle.unparcel(BaseBundle.java:221) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Bundle.getBundle(Bundle.java:763) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at aby.a(:com.google.android.gms.DynamiteModulesB:74) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at maps.ad.t.a(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at maps.ad.R.a(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at xx.onTransact(:com.google.android.gms.DynamiteModulesB:66) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.os.Binder.transact(Binder.java:387) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.maps.internal.IMapViewDelegate$zza$zza.onCreate(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.maps.MapView$zza.onCreate(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.dynamic.zza$3.zzb(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.dynamic.zza$1.zza(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.maps.MapView$zzb.zzbsp(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.maps.MapView$zzb.zza(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.dynamic.zza.zza(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.dynamic.zza.onCreate(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.google.android.gms.maps.MapView.onCreate(Unknown Source) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.myco.myapp.MyFragment.onCreateView(MyFragment.java:235) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v4.app.Fragment.performCreateView(Fragment.java:2087) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1113) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1295) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1277) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:2154) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:201) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:603) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:181) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at com.myco.myapp.main.MainActivity.onStart(MainActivity.java:176) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1266) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.Activity.performStart(Activity.java:6916) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3218) 
11-11 13:37:42.170 18389 18389 E AndroidRuntime: ... 9 more 
11-11 13:37:42.175 2546 3527 W ActivityManager: Force finishing activity com.myco.myapp/.main.MainActivity 

Answer 1

你应该保存地图的状态在一个单独的包，然后把这个包作为一个字段到您的片段的状态包。 恢复片段状态时，从片段的恢复状态包中提取映射的包并将其发送到映射的恢复状态方法。