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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. eUEry — ImgBB[^]

What I have tried:

I know how to put timer and how to populate the recylerview..just help me in positiong the items
David Crow 17-Sep-21 8:14am
"just help me in positiong the items"

Use the add() method of the list object that is associated with the adapter.
Kumar Harsh 2021 17-Sep-21 8:49am
Can you please elabourate a bit..add() is giving me an infinte recylerview
David Crow 17-Sep-21 9:46am
I'm assuming that all of the items being shown in the RecyclerView are contained in some sort of List object. For example, if item 0 needs to be moved to the end, do something like:
ItemInfo itemInfo = list.remove(0);
Kumar Harsh 2021 17-Sep-21 10:06am
Sir please Check this code..and let me know where to add the above 3 line which you told....

coursesArrayList = new ArrayList<>();
rcv.setLayoutManager(new LinearLayoutManager(getContext()));

// adding our array list to our recycler view adapter class.
myAdapter = new MyAdapter(coursesArrayList, this);

// setting adapter to our recycler view.

// below line is use to get the data from Firebase Firestore.
// previously we were saving data on a reference of Courses
// now we will be getting the data from the same reference.
db.collection("categories").orderBy("categoryTime", Query.Direction.ASCENDING)
.addSnapshotListener(new EventListener<querysnapshot>() {
public void onEvent(@Nullable @org.jetbrains.annotations.Nullable QuerySnapshot value, @Nullable @org.jetbrains.annotations.Nullable FirebaseFirestoreException error) {
if (!value.isEmpty()) {

List<documentsnapshot> list = value.getDocuments();

coursesArrayList.clear(); //clear old refresh new
for (DocumentSnapshot d : list) {
// after getting this list we are passing
// that list to our object class.
UserDet ud = d.toObject(UserDet.class);

assert ud != null;

// and we will pass this object class
// inside our arraylist which we have
// created for recycler view.

} else {
// if the snapshot is empty we are displaying a toast message.
Toast.makeText(getActivity() , "No data found in Database", Toast.LENGTH_SHORT).show();
David Crow 17-Sep-21 10:19am
According to your "...when the first item countdown timer ends i want the item at the tom to go straight to bottom..." comment, you would add that code at the point where the item's timer is ending.
Kumar Harsh 2021 17-Sep-21 10:33am
This is my adapter class...please let me know if here i have to insert the code.. I have user countdown timer in the onebindholder method....

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;

public MyAdapter.Holder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
return new Holder(LayoutInflater.from(context.getActivity()).inflate(R.layout.onerowforrecview, parent, false));

public void onBindViewHolder(@NonNull Holder holder, int position) {
// setting data to our text views from our modal class.
UserDet userDet = UserArrayList.get(position);


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";


public void onFinish() {
holder.itemView.setEnabled(false); //makig disclick
holder.ques_time_h.setText("Time up!");
holder.ques_amount_h.setEnabled(false); //btn disabled

Handler handler = new Handler();
Runnable run= new Runnable() {
public void run() {
ViewGroup.LayoutParams params = holder.itemView.getLayoutParams();
params.height = 0;



holder.itemView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {

Intent intent= new Intent(context.getActivity(),TournamentDetails.class);



public int getItemCount() {
// retu
Kumar Harsh 2021 26-Sep-21 9:44am
What is ItemInfo here can you please tell?
David Crow 26-Sep-21 21:35pm
It was just an example of a data type object that gets added to the list. It could be anything.

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