Recyclerview_Search

Search on Recyclerivew with EditText in Android

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in the first step inside the adapter class,create a new list of models as follows:

List<ModelName> filteritem;

Notice : here, for example, we (filteritem) the name of the object in the second step,you must new an ArrayList for the object created from List as follows:

filteritem = new ArrayList<>();
filteritem = item

Notice : (item) is the intial List made of the Model

in the next step outside the viewholder we add a new class called setFilter containing the following code to the project :

 public void setFilter (String namefilter){
        namefilter =namefilter.toLowerCase();
        if (namefilter.isEmpty()){
            filteritem = new ArrayList<>();
            filteritem = item;
        }
        else {
            filteritem = new ArrayList<>();
            for (int i = 0 ; i < item.size() ; i++)
            {
                if (item.get(i).getName().toLowerCase().contains(namefilter)){
                    filteritem.add(item.get(i));
                }
            }
        }
        notifyDataSetChanged();
    }

in the next step, we will replace the new list (filteritem) with the previous list (item) in onBindViewHolder and getItemCount

Model model = filteritem.get(position)
return filteritem.size();

then go to the MainActivity and create an EditText object, then findviewbyid it:

EditText search;
search = findviewById (R.id.txtsearch);

finally, add the TextChangeListener method to it and put the following code in the on TextChanged section :

search.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                adapter.setFilter(charSequence.toString().toLowerCase());
            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });

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an example of the end of this code :