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

在过去的一周半中,我注意到这个奇怪的 BadParcelableException 在我们的应用中稳步增加,并将其固定在 Android 上的 YouTube 新版本中。

如果您的应用正在播放 YouTube 视频、将您的应用置于后台、强制停止 YouTube 应用并再次恢复您的应用,则会发生此崩溃。崩溃可在 Youtube 版本 12.19.56 上重现。还在较旧的 YouTube 版本 12.05.21 上进行了测试,并且没有发生崩溃。

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 
    ... 
} 

请您参考如下方法:

View 状态保存和恢复的问题。 YouTube 应用程序有一个错误并存储 View 状态,其中包含来自 youtube apk 的类 asc 的实例。因此我们的应用程序无法恢复它,因为对此类一无所知。我的解决方案是通过以下代码阻止在 YouTubePlayerSupportFragment 中保存 YoutubePlayerView 的 View 状态:

@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); 
        } 
    } 
} 

应将此代码添加到 YouTubePlayerSupportFragment 的子类中。 此解决方案不会从 bundle 中删除 YouTube 播放器状态。这样youtube播放器就恢复成功了。


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