How to move Recyclerview items to the bottom after countdown timer ends? - android-recyclerview

Question

In my recyclerview their are countdown timer in each item..and when the first item countdown timer ends i want the item at the tom to go straight to bottom. The cycler should go on, till their are items in recylerview. I know how to add countdowntimer. Please let me know how to do the positioning logic Right image is what is required.
This is my adapter class...please let me know if here i have to insert the code..
public class MyAdapter extends RecyclerView.Adapter<myadapter.holder> {
// creating variables for our ArrayList and context
private ArrayList<userdet> UserArrayList;
private HomeFragment context;
String timey ;
// creating constructor for our adapter class
public MyAdapter(ArrayList<userdet> UserArrayList, HomeFragment context) {
this.UserArrayList = UserArrayList;
this.context = context;
}
#NonNull
#Override
public MyAdapter.Holder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return new Holder(LayoutInflater.from(context.getActivity()).inflate(R.layout.onerowforrecview, parent, false));
}
#Override
public void onBindViewHolder(#NonNull Holder holder, int position) {
// setting data to our text views from our modal class.
UserDet userDet = UserArrayList.get(position);
holder.ques_name_h.setText(userDet.getCategoryName());
}
long timer = userDet.getCategoryTime().toDate().getTime();
Date today = new Date();
final long currentTime = System.currentTimeMillis();
long expiryTime = timer - currentTime;
new CountDownTimer(expiryTime, 1000) {
public void onTick(long millisUntilFinished) {
long seconds = millisUntilFinished / 1000;
long minutes = seconds / 60;
long hours = minutes / 60;
long days = hours / 24;
timey = days+"d, " +hours % 24 + "h left";
holder.ques_time_h.setText(timey);
}
public void onFinish() {
holder.ques_amount_h.setButtonColor(R.color.teal_200);
holder.itemView.setEnabled(false); //makig disclick
holder.ques_time_h.setText("Time up!");
}
}.start();
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent= new Intent(context.getActivity(),TournamentDetails.class);
context.startActivity(intent);
}
});
}