Android EnumのクラスをParcelableにする

Android

IntentからIntentにいろいろな値を受け渡ししますね。
自作のクラスのオブジェクトもParcelableというインターフェースを実装することで受け渡しできますが、Enumのクラスだと、一工夫必要です。

Parcelableに受け渡せるようにできるようにするサンプルコードです。

 public enum VehicleType implements Parcelable {
    FLAT_BODY("FLAT_BODY"),
    WING("WING"),
    VAN("VAN"),
    FREEZER_CAR("FREEZER_CAR"),
    POWER_GATE("POWER_GATE");
 
    private final String name;
 
    private VehicleType(String s) {
        name = s;
    }
 
    public String toString() {
        return this.name;
    }
 
    public static VehicleType fromString(String vehicle_type_str) {
        return stringToEnum.get(vehicle_type_str);
    }
 
    private final static EnumMap<VehicleType, Integer> vehicleImageMap;
 
    public static int toIconImage(VehicleType vehicleType){
        return vehicleImageMap.get(vehicleType);
    }
    private static final Map<String, VehicleType> stringToEnum = new HashMap<String, VehicleType>();
 
    static {
 
        stringToEnum.put("1", FLAT_BODY);
        stringToEnum.put("2", WING);
        stringToEnum.put("3", VAN);
        stringToEnum.put("4", FREEZER_CAR);
        stringToEnum.put("5", POWER_GATE);
 
        vehicleImageMap = new EnumMap<VehicleType, Integer>(VehicleType.class);
        vehicleImageMap.put(VehicleType.FLAT_BODY, R.drawable.icon_car_flat);
        vehicleImageMap.put(VehicleType.WING, R.drawable.icon_car_wing);
        vehicleImageMap.put(VehicleType.VAN, R.drawable.icon_car_van);
        vehicleImageMap.put(VehicleType.FREEZER_CAR, R.drawable.icon_car_freeze);
        vehicleImageMap.put(VehicleType.POWER_GATE, R.drawable.icon_power_gate);
    }
 
    // 99.9% of the time you can just ignore this
    @Override
    public int describeContents() {
        return 0;
    }
 
    // write your object's data to the passed-in Parcel
    @Override
    public void writeToParcel(Parcel out, int flags) {
        out.writeString(name);
    }
 
    // this is used to regenerate your object. All Parcelables must have a CREATOR that implements these two methods
    public static final Parcelable.Creator<VehicleType> CREATOR = new Parcelable.Creator<VehicleType>() {
        public VehicleType createFromParcel(Parcel in) {
            return VehicleType.values()[in.readInt()];
        }
 
        public VehicleType[] newArray(int size) {
            return new VehicleType[size];
        }
    };
 
    // example constructor that takes a Parcel and gives you an object populated with it's values
    private VehicleType(Parcel in) {
        name = in.readString();
    }
 };

下記を参考にさせて頂きました、ありがとうございます。

http://stackoverflow.com/questions/2836256/passing-enum-or-object-through-an-intent-the-best-solution