使用新版YouTube时,YouTube Android Player API会在"解组:asc"时抛出"BadParcelableException ClassNotFoundException"

Question

向YouTube Android Player API库工程师提交错误:请参阅android-youtube-api标记

在过去一周半的过程中,我注意到这个奇怪的BadParcelableException在我们的应用程序中稳步增长,并将其钉在了Android的Android新版本上.

如果您的应用正在播放YouTube视频,将您的应用带到后台,强制停止Youtube应用并再次恢复您的应用,则会发生此崩溃.在Youtube版本12.19.56上可以重现崩溃.还在较旧的YouTube版本12.05.21上进行了测试,但崩溃并不存在.

堆栈跟踪:

main Exception: Unable to start activity ComponentInfo{com.myapp.MainActivity}: 
android.os.BadParcelableException: ClassNotFoundException when unmarshalling: asc 
Stack: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp.MainActivity}: 
android.os.BadParcelableException: ClassNotFoundException when unmarshalling: asc 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2666) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2727) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6121) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779) Caused by: 
android.os.BadParcelableException: ClassNotFoundException when unmarshalling: asc 
at android.os.Parcel.readParcelableCreator(Parcel.java:2536) 
at android.os.Parcel.readParcelable(Parcel.java:2462) 
at android.os.Parcel.readValue(Parcel.java:2365) 
at android.os.Parcel.readSparseArrayInternal(Parcel.java:2813) 
at android.os.Parcel.readSparseArray(Parcel.java:2068) 
at android.os.Parcel.readValue(Parcel.java:2422) 
at android.os.Parcel.readArrayMapInternal(Parcel.java:2732) 
at android.os.BaseBundle.unparcel(BaseBundle.java:269) 
at android.os.Bundle.getSparseParcelableArray(Bundle.java:934) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1208) 
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528) 
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1595) 
at android.support.v4.app.FragmentManagerImpl.dispatchCreate(FragmentManager.java:2893) 
at android.support.v4.app.FragmentController.dispatchCreate(FragmentController.java:190) 
at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:353) 
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:85) 
at com.myapp.BaseActivity.onCreate(BaseActivity.java:36) 
at com.myapp.MainActivity.onCreate(MainActivity.java:190) 
at android.app.Activity.performCreate(Activity.java:6682) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2619) ... 9 more

Caused by: java.lang.ClassNotFoundException: Didn't find class "asc" on path: DexPathList[[zip file "/data/app/com.myapp-naA-_cCrz-w81rqx98ipcQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.myapp-naA-_cCrz-w81rqx98ipcQ==/lib/arm64, /system/lib64, /vendor/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 32 more

更多信息:

@Override
public void onCreate(Bundle savedInstanceState) {
    ...
    super.onCreate(savedInstanceState); // Crashing here MainActivity.java:190
    ...
}

Answer 1

视图状态保存和恢复的问题。YouTube 应用程序有一个错误并存储视图状态，其中包含来自 youtube apk 的类实例asc。因此我们的应用程序无法恢复它，因为对此类一无所知。YoutubePlayerView我的解决方案是防止通过下一个代码保存视图状态YouTubePlayerSupportFragment：

@Override
public void onSaveInstanceState(Bundle bundle) {
    super.onSaveInstanceState(bundle);

    // disable view state saving to prevent saving states from youtube apk which cannot be restored.
    View view = getView();
    if (view instanceof ViewGroup) {
        ViewGroup viewGroup = ((ViewGroup) view);
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            viewGroup.getChildAt(i).setSaveFromParentEnabled(false);
        }
    }
}

应该将此代码添加到您的YouTubePlayerSupportFragment. 此解决方案不会从捆绑包中删除 YouTube 播放器状态。这样youtube播放器就恢复成功了。