Serializable SparseArray<Custom Object>

I want to send my data from Activity1 to Activity2 with putExtra.

My Custom object implements Serializable :

public class ARObjectCategory implements Serializable {

private static final long serialVersionUID = 3128594851129501738L;

public int id;
public String name;
public transient ARObjectCategory parent;
public transient SparseArray<ARObjectCategory> children;
public transient Bitmap iconBitmap = null;
public String icon;
private boolean active = false;

public ARObjectCategory(int id, String name, ARObjectCategory parent) {
    this.id = id;
    this.name = name;
    this.parent = parent;
    this.children = new SparseArray<>();
}


public void addChild(ARObjectCategory child) {
    children.append(child.id, child);
    if (getActive())
        child.setActive(true);
}

public final ARObjectCategory getChild(int index) {
    return children.valueAt(index);
}

public final SparseArray<ARObjectCategory> getChildren() {
    return this.children;
}

public final int getParentLast() {

    ARObjectCategory parentTemp = this.parent;
    while (parentTemp.parent != null) {
        parentTemp = parentTemp.parent;
    }
    return parentTemp.id;
}


public final ARObjectCategory getChildById(int id) {
    return children.get(id, null);
}

public final int getChildrenCount() {
    return children.size();
}

public Boolean getActive() {
    return this.active;
}

public void setActive(Boolean bool) {
    this.active = bool;
}

public Bitmap getIconBitmap() {
    return iconBitmap;
}

public void setIconBitmap(Bitmap iconBitmap) {
    this.iconBitmap = iconBitmap;
}

public String getIcon() {
    return icon;
}

public void setIcon(String icon) {
    this.icon = icon;
}

}

Activity1.java (Sender):

 ARObjectCategory test1= adapter.getItem(position);
       Intent subCat= new Intent(getActivity(), SubCategoriesActivity.class);
        subCat.putExtra("test",test1);
        subCat.putExtra("selected",position);
       startActivity(subCat);

On Debug Mode my object looks ok. SpraseArray got object of AROjcectCategory.

Activity2.java (Reciever):

Bundle extras = getIntent().getExtras();
    if (extras != null) {
        int selected = extras.getInt("selected", -1);
        ARObjectCategory list = (ARObjectCategory) extras.getSerializable("test");

    SparseArray<ARObjectCategory> lista = list.getChildren();
  }

But when i debug the Activity2. I see that my SpraseArray of children is null

Finally when i remove the transient from my objects.

public transient ARObjectCategory parent;
public transient SparseArray<ARObjectCategory> children;

I am getting the following error on my logcat :

java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.ethos.ar.core.ARObjectCategory) ........
Caused by: java.io.NotSerializableException: android.util.SparseArray ......

What is the correct way to send Object that has SpraseArray to other Activity.

Tip: Parcelable is not working:

dest.writeParcelable(this.children);
SparseArray<ARObjectCategory> cannot be converted to SparseArray<Object>

Thanks