targetSdkVersion 29 does not serialize Location objects properly

[y20k]

I observed a problem when I updated from targetSdkVersion 27 to targetSdkVersion 29 in a project. GSON failes to serialize a Location object when using targetSdkVersion 29.

Location JSON string produced with targetSdkVersion 27

"location":{"mAltitude":0.0,"mBearing":0.0,"mBearingAccuracyDegrees":0.0,"mElapsedRealtimeNanos":33676559450037,"mHorizontalAccuracyMeters":20.0,"mLatitude":38.06770166666667,"mLongitude":-122.58285666666667,"mProvider":"gps","mSpeed":0.0,"mSpeedAccuracyMetersPerSecond":0.0,"mTime":1573423211000,"mVerticalAccuracyMeters":0.0}

Location JSON string produced with targetSdkVersion 29

"location":{"mElapsedRealtimeNanos":33918570517227}

Only mElapsedRealtimeNanos get serialized when using 29. Location implements @Parcelable as far as I know. I am using the following code to handle de/serialization:

data class WayPoint(var location: Location = Location(LocationManager.GPS_PROVIDER)): Parcelable {

    constructor(parcel: Parcel) : this(parcel.readParcelable(Location::class.java.classLoader) ?: Location(LocationManager.GPS_PROVIDER)) {
    }

    override fun writeToParcel(parcel: Parcel, flags: Int) {
        parcel.writeParcelable(location, flags)
    }

    override fun describeContents(): Int {
        return 0
    }

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

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

[lyubomyr-shaydariv]

You should not serialize/deserialize classes you don't control over. See a similar issue: #1573

[y20k]

Thanks for the quick answer. I will copy over the values from the Location object to my own WayPoint class. That should result in a shorter JSON string as a side effect.