How to fix Unmarshalling unknown type code XXX at offset YYY in Android?

问题

I'm having app crash on resume because of Unmarshalling exception. I've checked all the Serializables have constructor with no parameters and even checked all the serializables using ObjectStream (save to file and load from file). How can i understand actual class type for parcelable offset that cause exception:

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

Saved data consists of Bundles and Serializables and all of them look good.

I'm going to do the next:

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

How can i understand what type is actually for Parcelable offset?

回答1:

There's some rules for write and read parcelables.

1- Be careful about type mismatch. If you write int, don't try to read long etc.

2- Be careful about order of writes and reads. Objects must be at the same sort order when reading and writing.

Both of these can cause "Unmarshalling unknown type code".

回答2:

It's because of Proguard obfuscation - it processed Parcelable. solution: Proguard causing RuntimeException (Unmarshalling unknown type code) in Parcelable class

回答3:

If a type of List is added, it should be:

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

and unparcel it using the class type like this:

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

回答4:

In my case it is fixed after upgrading support library to 23.2.1

回答5:

It's not Proguard related issue.. But when proguard and minify enable it's issue occurrence is always.

Problem is in sequence of writing and reading of object...sequence should be same, as it is like reading file.

You can use android studio plug in for make class as parcelable https://plugins.jetbrains.com/plugin/7332?pr=

回答6:

In my case my class don't added CREATOR filed when extending from another Parcelable parent.

public class Image implements Parcelable {
        protected Image(Parcel in) {
        }

        public static final Creator<Image> CREATOR = new Creator<Image>() {
            @Override
            public Image createFromParcel(Parcel in) {
                return new Image(in);
            }

            @Override
            public Image[] newArray(int size) {
                return new Image[size];
            }
        };

        @Override
        public int describeContents() {
            return 0;
        }

        @Override
        public void writeToParcel(Parcel dest, int flags) {
        }
}

public class ImageChild extends Image {
        protected ImageChild(Parcel in) {
            super(in);
        }


        @Override
        public int describeContents() {
            return 0;
        }

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

In ImageChild missing CREATOR field

回答7:

Using Kotlin, the object 'Nota' has a Custom object 'CentroCusto' that contains only primitive properties.

class Nota(var id: Int? = null, var centroCusto: ArrayList<CentroCusto>? = null) : Parcelable {

constructor(source: Parcel) : this(
        source.readValue(Int::class.java.classLoader) as Int?,
        //Exception in below line -> Unmarshalling unknown type code 
        source.createTypedArrayList(CentroCusto.CREATOR) 
)

override fun describeContents() = 0

override fun writeToParcel(dest: Parcel, flags: Int) = with(dest) {
    writeValue(id)
    writeTypedList(centroCusto)
}

companion object {
    @JvmField
    val CREATOR: Parcelable.Creator<Nota> = object : Parcelable.Creator<Nota> {
        override fun createFromParcel(source: Parcel): Nota = Nota(source)
        override fun newArray(size: Int): Array<Nota?> = arrayOfNulls(size)
    }
}

The CentroCusto class:

class CentroCusto(var id: Int? = null, var descricao: String? = null, var aprovacaoDiretoria: Int? = null, var permiteMarcar: Boolean? = null) : Parcelable {

constructor(parcel: Parcel) : this(
        parcel.readValue(Int::class.java.classLoader) as? Int,
        parcel.readString(),
        parcel.readValue(Int::class.java.classLoader) as? Int,
        parcel.readValue(Boolean::class.java.classLoader) as? Boolean) {
}

override fun writeToParcel(parcel: Parcel, flags: Int) {
    parcel.writeValue(id)
    parcel.writeString(descricao)
    parcel.writeValue(aprovacaoDiretoria)
    parcel.writeValue(permiteMarcar)
}

override fun describeContents(): Int {
    return 0
}

companion object CREATOR : Parcelable.Creator<CentroCusto> {
    override fun createFromParcel(parcel: Parcel): CentroCusto {
        return CentroCusto(parcel)
    }

    override fun newArray(size: Int): Array<CentroCusto?> {
        return arrayOfNulls(size)
    }
}

}

回答8:

Just remove all parcelable methods and generate them again with valid sequence

回答9:

In my case it was caused by data size exceeding max limit of that can be put to Parcel which is about 1 MB.

Solution: optimize your Parcelable code to put as less data as possible (e.g. do not put Serializable objects to Parcel)

回答10:

Just to add: this error can also happen, when using custom views and don't properly save/restore their states via onSaveInstanceState() and onRestoreInstanceState().

So if this error occurs, also check your custom views.

来源：https://stackoverflow.com/questions/21844945/how-to-fix-unmarshalling-unknown-type-code-xxx-at-offset-yyy-in-android