如何修复Android中偏移YYY的Unmarshalling未知类型代码XXX？

Question

由于Unmarshalling异常,我正在恢复应用程序崩溃.我检查了所有Seri​​alizables都没有参数的构造函数,甚至使用ObjectStream检查了所有可序列化(保存到文件并从文件加载).我如何理解导致异常的parcelable偏移的实际类类型:

Parcel android.os.Parcel@42209460: Unmarshalling unknown type code
 2131165303 at offset 3748
         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2080)
         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2105)
         at android.app.ActivityThread.access$600(ActivityThread.java:136)
         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1201)
         at android.os.Handler.dispatchMessage(Handler.java:99)
         at android.os.Looper.loop(Looper.java:137)
         at android.app.ActivityThread.main(ActivityThread.java:4876)
         at java.lang.reflect.Method.invokeNative(Native Method)
         at java.lang.reflect.Method.invoke(Method.java:511)
         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:804)
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:571)
         at com.kdgdev.xtension.core.XtensionMain.main(XtensionMain.java:91)
         at dalvik.system.NativeStart.main(Native Method)
        Caused by: java.lang.RuntimeException: Parcel android.os.Parcel@42209460: Unmarshalling unknown type code 2131165303
 at offset 3748
         at android.os.Parcel.readValue(Parcel.java:2032)
         at android.os.Parcel.readSparseArrayInternal(Parcel.java:2255)
         at android.os.Parcel.readSparseArray(Parcel.java:1687)
         at android.os.Parcel.readValue(Parcel.java:2022)
         at android.os.Parcel.readMapInternal(Parcel.java:2226)
         at android.os.Bundle.unparcel(Bundle.java:223)
         at android.os.Bundle.getSparseParcelableArray(Bundle.java:1232)
        at com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState(PhoneWindow.java:1690)
         at android.app.Activity.onRestoreInstanceState(Activity.java:999)
         at com.actionbarsherlock.app.SherlockFragmentActivity.onRestoreInstanceState(Unknown
 Source)
         at name.myname.android.app.ui.MainActivity.onRestoreInstanceState(Unknown
 Source)
         at android.app.Activity.performRestoreInstanceState(Activity.java:971)
         at android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1130)
         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2058)
       ... 12 more

保存的数据由Bundles和Serializables 组成,所有数据看起来都很好.

我打算做下一个:

try {
// unmarshalling
} catch (Throwable t) {
// look offset 
}

我如何理解Parcelable偏移的实际类型？

Answer 1

写入和读取parcelables有一些规则.

1-注意类型不匹配.如果你写int,不要试着读长等.

2-注意写入和读取的顺序.在读取和写入时,对象必须处于相同的排序顺序.

这两个都可能导致"解组未知类型代码".

Answer 2

这是因为Proguard混淆 - 它处理了Parcelable.解决方案:Proguard在Parcelable类中导致RuntimeException(Unmarshalling unknown type code)

Answer 3

如果添加了列表类型，则应为：

@Override
    public void writeToParcel(Parcel dest, int flags) {
        super.writeToParcel(dest, flags);
        dest.writeList(this.mList);

并使用如下所示的类类型将其拆包：

protected MyClass(Parcel in) {
        super(in);
        this.mList = new ArrayList<>();
        in.readList(this.mList, MyRequiredClass.class.getClassLoader());