How to highlight the filtered text while using SearchView widget in android

Question

I have implemented SearchView Widget in my app. Its working fine. Now i need to do is, whenever i type a word in my SearchView Bar

Answer 1

you can use Spannable TextView for this. hope so this Method will help you

Method:

public static CharSequence highlightText(String search, String originalText) {
    if (search != null && !search.equalsIgnoreCase("")) {
        String normalizedText = Normalizer.normalize(originalText, Normalizer.Form.NFD).replaceAll("\\p{InCombiningDiacriticalMarks}+", "").toLowerCase();
        int start = normalizedText.indexOf(search);
        if (start < 0) {
            return originalText;
        } else {
            Spannable highlighted = new SpannableString(originalText);
            while (start >= 0) {
                int spanStart = Math.min(start, originalText.length());
                int spanEnd = Math.min(start + search.length(), originalText.length());
                highlighted.setSpan(new ForegroundColorSpan(Color.BLUE), spanStart, spanEnd, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                start = normalizedText.indexOf(search, spanEnd);
            }
            return highlighted;
        }
    }
    return originalText;
}

and return originalText will highlight text.

Answer 2

You Should do this in onBindViewHolder() method (using RecyclerView)

class YourAdapter

String searchString="";

@Override
    public void onBindViewHolder(AllMessageAdapter.DataObjectHolder holder, final int position) {

        holder.message.setText(mDataset.get(position).Message);

        AllMessageList.Message message=mDataset.get(position);

        String name = message.Message.toLowerCase(Locale.getDefault());

        if (name.contains(searchString)) {

            int startPos = name.indexOf(searchString);
            int endPos = startPos + searchString.length();

            Spannable spanString = Spannable.Factory.getInstance().newSpannable(holder.message.getText());
            spanString.setSpan(new ForegroundColorSpan(Color.RED), startPos, endPos, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

            holder.message.setText(spanString);
        }

    }

Your Filter(in Adapter)

public void setFilter(ArrayList<AllMessageList.Message> countryModels,String searchString) {
        this.searchString=searchString;
        mDataset = new ArrayList<>();
        mDataset.addAll(countryModels);
        notifyDataSetChanged();
    }

Answer 3

You can use this to highlight all the keywords.

 button.setOnClickListener(new OnClickListener() {      
      @Override
      public void onClick(View v) {

        String ett = edittext.getText().toString();
        String tvt = textview.getText().toString();
        int ofe = tvt.indexOf(ett, 0);
        Spannable spannable = new SpannableString(tvt);

        for (int ofs = 0; ofs < tvt.length() && ofe != -1; ofs = ofe + 1) {
        ofe = tvt.indexOf(ett, ofs);

                if (ofe == -1)
                    break;
                else {
                  ColorStateList blueColor = new ColorStateList(new nt[][] { new int[] {} }, new int[] { Color.BLUE });
                  TextAppearanceSpan highlightSpan = new TextAppearanceSpan(null, Typeface.BOLD, -1, blueColor, null);
                  spannable.setSpan(highlightSpan, ofe, ofe+edittext.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                  textview.setText(spannable);
                }
            }
        }
    });