How to handle multiple countdown timers in RecyclerView?

Question

I have a Recyclerview , and I need to display a countdown on every row.

Here is a similar question coutndown timers in listview It has a good solution , but I need that with recyclerview

Edit:

Here is my code Adapter MyAdapter:

 public class AdapterItems extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

private ArrayList<TopCompetitions> mListItems = new ArrayList<>();
private ImageLoader mImageLoader;
private Context context;
private Handler handler;
/******************************************/
String current_date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date d1 = null;
Date d2 = null;
long diff;
long diffSeconds;
long diffMinutes;
long diffHours;
long diffDays;

String reachableDate = "";
/******************************************/
private ScheduledFuture updateFuture;

public AdapterItems(Context context) {

    this.context = context;
    mImageLoader = AppController.getInstance().getImageLoader();

}

public void setmListItems(ArrayList<TopCompetitions> mListItems) {
    this.mListItems = mListItems;
    //update the adapter to reflect the new set of mListItems
    notifyDataSetChanged();
}


@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {


    View itemView = LayoutInflater.
            from(parent.getContext()).
            inflate(R.layout.custom_horizontal_row, parent, false);
    return new ItemHolder(itemView);


}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {


    final TopCompetitions currentItem = mListItems.get(position);
    final ItemHolder itemHolder = (ItemHolder) holder;

   /* start_date , name_com_ar , name_com_en,
            question_en,answer_ar1,answer_ar2,answer_ar3
            ,answer_en1,answer_en2,answer_en3,right_answer;
    */
    itemHolder.item_id.setText(currentItem.getPrize_id());
    itemHolder.item_description.setText(currentItem.getName_com_ar());
    itemHolder.start_date.setText(currentItem.getStart_date());
    itemHolder.end_date.setText(currentItem.getEnd_date());
    itemHolder.name_com_ar.setText(currentItem.getName_com_ar());
    itemHolder.name_com_en.setText(currentItem.getName_com_en());
    itemHolder.answer_en1.setText(currentItem.getAnswer_en1());
    itemHolder.answer_en2.setText(currentItem.getAnswer_en2());
    itemHolder.answer_en3.setText(currentItem.getAnswer_en3());
    itemHolder.answer_ar1.setText(currentItem.getAnswer_ar1());
    itemHolder.answer_ar2.setText(currentItem.getAnswer_ar2());
    itemHolder.answer_ar3.setText(currentItem.getAnswer_ar3());
    itemHolder.right_answer.setText(currentItem.getRight_answer());
    itemHolder.question_en.setText(currentItem.getQuestion_en());
    itemHolder.question_ar.setText(currentItem.getQuestion_ar());
    itemHolder.desc_ar.setText(currentItem.getPrize_desc_ar());
    itemHolder.desc_en.setText(currentItem.getPrize_desc_en());

    String urlLogo = currentItem.getPrize_pic1();
    loadImages(urlLogo, itemHolder);
    setDefferinceTimer(itemHolder , currentItem.getEnd_date());


    if (updateFuture == null) {
        final Handler mainHandler = new Handler(Looper.getMainLooper());
        updateFuture = Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                setDefferinceTimer(itemHolder , currentItem.getEnd_date());
                notifyDataSetChanged();
                mainHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        notifyDataSetChanged();
                    }
                });
            }
        }, 0, 1000, TimeUnit.MILLISECONDS);
    }

  /*  new Handler(Looper.getMainLooper()).post(new Runnable() {
        @Override
        public void run() {
            new CountDownTimer(20000, 1000) {

                public void onTick(long millisUntilFinished) {
                    startCountDown(itemHolder, currentItem.getEnd_date() + " 00:00:00");
                    notifyDataSetChanged();
                }

                public void onFinish() {
                    //counterTextView.setText("done!");
                }
            }.start();
        }
    });
       */

}

public void setDefferinceTimer(final RecyclerView.ViewHolder holder , String itemEndDate){

    final ItemHolder itemHolder = (ItemHolder) holder;

    current_date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
   // reachableDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(itemEndDate);

    try {
        d1 = format.parse(current_date);
        d2 = format.parse(itemEndDate+" 00:00:00");
    } catch (ParseException e) {
        e.printStackTrace();
    }

    diff = d2.getTime() - d1.getTime();

    diffSeconds = diff / 1000 % 60;
    diffMinutes = diff / (60 * 1000) % 60;
    diffHours = diff / (60 * 60 * 1000) % 24;
    diffDays = diff / (24 * 60 * 60 * 1000);

    itemHolder.days_tf.setText(""+diffDays);
    itemHolder.hours_tf.setText(""+diffHours);
    itemHolder.minutes_tf.setText(""+diffMinutes);
    itemHolder.seconds_tf.setText(""+diffSeconds);

}

private void loadImages(String urlThumbnail, final RecyclerView.ViewHolder holder) {
    final ItemHolder itemHolder = (ItemHolder) holder;
    mImageLoader.get(urlThumbnail, new ImageLoader.ImageListener() {
        @Override
        public void onResponse(ImageLoader.ImageContainer response, boolean isImmediate) {
            itemHolder.item_image.setImageBitmap(response.getBitmap());
            //holder.salon_gender.setImageBitmap(response.getBitmap());
        }

        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });
}


@Override
public int getItemCount() {
    return mListItems.size();
}


private class ItemHolder extends RecyclerView.ViewHolder {

    public TextView item_id, item_description, end_date,
            start_date, name_com_ar, name_com_en, question_ar,
            question_en, answer_ar1, answer_ar2, answer_ar3, answer_en1,
            answer_en2, answer_en3, right_answer , desc_ar , desc_en;
    public TextView days_tf, hours_tf, minutes_tf, seconds_tf;
    public CircleImageView item_image;

    public ItemHolder(View itemView) {
        super(itemView);

        start_date = (TextView) itemView.findViewById(R.id.start_date);
        end_date = (TextView) itemView.findViewById(R.id.end_date);
        name_com_ar = (TextView) itemView.findViewById(R.id.name_com_ar);
        name_com_en = (TextView) itemView.findViewById(R.id.name_com_en);
        question_en = (TextView) itemView.findViewById(R.id.question_en);
        question_ar = (TextView) itemView.findViewById(R.id.question_ar);
        desc_ar = (TextView) itemView.findViewById(R.id.desc_ar);
        desc_en = (TextView) itemView.findViewById(R.id.desc_en);
        answer_ar1 = (TextView) itemView.findViewById(R.id.answer_ar1);
        answer_ar2 = (TextView) itemView.findViewById(R.id.answer_ar2);
        answer_ar3 = (TextView) itemView.findViewById(R.id.answer_ar3);
        answer_en1 = (TextView) itemView.findViewById(R.id.answer_en1);
        answer_en2 = (TextView) itemView.findViewById(R.id.answer_en2);
        answer_en3 = (TextView) itemView.findViewById(R.id.answer_en3);
        right_answer = (TextView) itemView.findViewById(R.id.right_answer);


        item_id = (TextView) itemView.findViewById(R.id.item_id);
        item_description = (TextView) itemView.findViewById(R.id.item_description);
        item_image = (CircleImageView) itemView.findViewById(R.id.item_image);


        days_tf = (TextView) itemView.findViewById(R.id.days_tf);
        hours_tf = (TextView) itemView.findViewById(R.id.hours_tf);
        minutes_tf = (TextView) itemView.findViewById(R.id.minutes_tf);
        seconds_tf = (TextView) itemView.findViewById(R.id.seconds_tf);

    }



}

Answer 1

Add a CountDownTimer member in the ViewHolder. In getView() set and start the counter, and don't forget to cancel any existing one in the same instance of ViewHolder. In onTick() you need to update the value on the display, not start the counter.