BadParcelableException in google maps code

Question

Running slightly modified example of Google Maps throws BadParcelableException in the Google Maps code. The LatLng class is parcelable but it cannot be found. It seems that Google Maps code is trying to unparcel the object that was not parcelled by it. What cases the problem?

package com.example.mapdemo;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

import android.os.Bundle;

public class RawMapViewDemoActivity extends android.support.v4.app.FragmentActivity {
    private MapView mMapView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.raw_mapview_demo);

        mMapView = (MapView) findViewById(R.id.map);
        mMapView.onCreate(savedInstanceState);
    }

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

        outState.putParcelable("marker", new LatLng(0, 0));
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

        LatLng ll = savedInstanceState.getParcelable("marker");
    }
}

...

FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity 
    ComponentInfo{com.example.mapdemo/com.example.mapdemo.RawMapViewDemoActivity}: 
    android.os.BadParcelableException: ClassNotFoundException when unmarshalling: 
    com.google.android.gms.maps.model.LatLng
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
   at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2832)
   at android.app.ActivityThread.access$1600(ActivityThread.java:117)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
   at android.os.Handler.dispatchMessage(Handler.java:99)
   at android.os.Looper.loop(Looper.java:130)
   at android.app.ActivityThread.main(ActivityThread.java:3683)
   at java.lang.reflect.Method.invokeNative(Native Method)
   at java.lang.reflect.Method.invoke(Method.java:507)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
   at dalvik.system.NativeStart.main(Native Method)

Caused by: android.os.BadParcelableException: 
ClassNotFoundException when unmarshalling: com.google.android.gms.maps.model.LatLng
   at android.os.Parcel.readParcelable(Parcel.java:1958)
   at android.os.Parcel.readValue(Parcel.java:1846)
   at android.os.Parcel.readMapInternal(Parcel.java:2083)
   at android.os.Bundle.unparcel(Bundle.java:208)
   at android.os.Bundle.getBundle(Bundle.java:1078)
   at com.google.android.gms.maps.internal.MapStateHelper
       .getParcelableFromMapStateBundle(MapStateHelper.java:41)
   at maps.y.ae.a(Unknown Source)
   at maps.y.bm.onCreate(Unknown Source)
   at com.google.android.gms.maps.internal.IMapViewDelegate$Stub
       .onTransact(IMapViewDelegate.java:66)
   at android.os.Binder.transact(Binder.java:279)
   at com.google.android.gms.maps.internal.IMapViewDelegate$a$a
       .onCreate(Unknown Source)
   at com.google.android.gms.maps.MapView$b.onCreate(Unknown Source)
   at com.google.android.gms.internal.c$3.a(Unknown Source)
   at com.google.android.gms.internal.i.b(Unknown Source)
   at com.google.android.gms.maps.MapView$a.a(Unknown Source)
   at com.google.android.gms.maps.MapView$a.a(Unknown Source)
   at com.google.android.gms.internal.c.a(Unknown Source)
   at com.google.android.gms.internal.c.onCreate(Unknown Source)
   at com.google.android.gms.maps.MapView.onCreate(Unknown Source)
   at com.example.mapdemo.RawMapViewDemoActivity
       .onCreate(RawMapViewDemoActivity.java:40)
   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
   ... 12 more

Answer 1

Just to add to the existing answers here, I had been removing my Parcels from the saved state before calling mapView.onCreate and it was working fine.

However after adding a ViewPager to my Fragment I didn't realise that the BadParcelableException had returned and the code made it to production. It turns out that the ViewPager saves its state too and, because it's part of the Support Library, the Google Map cannot find the class to unparcel it.

So I opted to invert the process, instead of removing Parcels from the Bundle that I knew about, I opted to create a new Bundle for the map copying over only the map's state.

private final static String BUNDLE_KEY_MAP_STATE = "mapData";

@Override
public void onSaveInstanceState(Bundle outState) {
    // Save the map state to it's own bundle
    Bundle mapState = new Bundle();
    mapView.onSaveInstanceState(mapState);
    // Put the map bundle in the main outState
    outState.putBundle(BUNDLE_KEY_MAP_STATE, mapState);
    super.onSaveInstanceState(outState);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_map, container, false);
    mapView = (MapView) view.findViewById(R.id.mapView);
    mapView.getMapAsync(this);

    Bundle mapState = null;
    if (savedInstanceState != null) {
        // Load the map state bundle from the main savedInstanceState
        mapState = savedInstanceState.getBundle(BUNDLE_KEY_MAP_STATE);
    }

    mapView.onCreate(mapState);
    return view;
}