How to delete item from recyclerview programmatically?

Question

I want to remove an item from my recyclerview using an if condition

Here is my code for my adapter class. What I want to do is remove from displaying if its status is equal to unlive I'm retrieving the data from firebase

ArrayList<Adapter_Hotels> hotelsList;
Context context;

public Hotels_Adapter(ArrayList<Adapter_Hotels> list, Context context) {
    this.hotelsList = list;
    this.context = context;
}

@NonNull
@Override
public MyHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View view = LayoutInflater.from(context).inflate(R.layout.listview_layout, parent, false);
    return new MyHolder(view);
}

@Override
public void onBindViewHolder(@NonNull MyHolder holder, int i) {
    holder.hName.setText(hotelsList.get(i).getTitle());
    holder.hAddress.setText(hotelsList.get(i).getProvince() + ", " + hotelsList.get(i).getCountry());
    Picasso.get().load(hotelsList.get(i).getUrl_path()).fit().into(holder.hImage);


    String status = hotelsList.get(i).getStatus();
    if (status.equals("unlive")) {
        removeItem(holder.getAdapterPosition());
    }

}

@Override
public int getItemCount() {

    return hotelsList.size();
}

public void removeItem(int position){
    hotelsList.remove(position);
    this.notifyItemRemoved(position);

}

My activity code

mRef.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                for (DataSnapshot hotelsSnapshot : dataSnapshot.getChildren()) {
                    Adapter_Hotels hotels = hotelsSnapshot.getValue(Adapter_Hotels.class);
                    String hotel_status = hotels.getStatus();
                    String hotel_name = hotels.getTitle();
                    String hotel_image = hotels.getUrl_path();
                    String hotel_province = hotels.getProvince();
                    String hotel_country = hotels.getCountry();
                    String hn = hotels.setTitle(hotel_name);
                    String hi = hotels.setUrl_path(hotel_image);
                    String hp = hotels.setProvince(hotel_province);
                    String hc = hotels.setCountry(hotel_country);
                    String hs = hotels.setStatus(hotel_status);
                    hotelList.add(new Adapter_Hotels(hn, hi, hc, hp, hs));

                    Log.v("DSDS", String.valueOf(hotelList.size()));
                    dialog.dismiss();
                    getActivity().getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);


                }

                hotelsAdapter.notifyDataSetChanged();
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
                throw databaseError.toException();
            }
        });

        hotelsAdapter = new Hotels_Adapter(hotelList, getContext());
        mListview.setLayoutManager(new LinearLayoutManager(getContext()));
        mListview.setAdapter(hotelsAdapter);

Do you need it to remove before you create adapter or after? — Kiryl Tkach, Mar 17 '19 at 16:21

score 0 · Answer 1 · answered Mar 17 '19 at 15:44

0

To remove, you can add this line

hotelList.remove(getAdapterPosition());

Perform the above code inside onLongClick() method in the ViewHolder class.

@Override
    public boolean onLongClick(View view) {
        //You can generate one list from which user can choose to delete.
        hotelList.remove(getAdapterPosition());
        return true;
    }

answered Mar 17 '19 at 15:44

Abubakar Siddique

23
9

1

How can I delete it programmatically no using any `onclick` method? – nani10 Mar 17 '19 at 15:57

score 0 · Answer 2 · answered Mar 17 '19 at 17:03

0

Hi there ! why don't you remove the line of your list before pass that to the adapter ?

You can define function in your Activity to do this , and then pass the final list to your adapter

answered Mar 17 '19 at 17:03

reza shah

71
6

can't i'm using `ArrayList` – nani10 Mar 17 '19 at 17:59
https://stackoverflow.com/questions/10714233/remove-item-from-arraylist @nani10 – reza shah Mar 17 '19 at 19:13

How to delete item from recyclerview programmatically?

2 Answers2