wip

        Gson gson = new GsonBuilder()

                .registerTypeAdapter(RichElement.class, new RichElementTypeAdapter())

                .registerTypeAdapter(PreviewObject.class, new PreviewListAdapter())

                .registerTypeAdapter(PreviewObject.class, new PreviewObjectAdapter())

                .create();

        Type listType = new TypeToken<List<Activity>>(){}.getType();

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import java.util.Map;

/**

 * Activity Data Model

    @SerializedName("affecteduser")

    public String affectedUser;

    public String subject;

    public String message;

    public String icon;

    public String link;

    public String objectId;

    @SerializedName("object_name")

    public String objectName;

    public List<PreviewObject> previews;

    public Map<Integer, String> objects;

    @SerializedName("subject_rich")

    public RichElement richSubjectElement;

    public void setPreviews(ArrayList<PreviewObject> previews) {

        this.previews = previews;

    }

    public Map<Integer, String> getObjects() {

        return objects;

    }

}

 * PreviewList Parser

 */

public class PreviewListAdapter extends TypeAdapter<PreviewObject> {

public class PreviewObjectAdapter extends TypeAdapter<PreviewObject> {

    @Override

    public void write(JsonWriter out, PreviewObject value) {