如何在 Android 中使用 SearchView 小部件时突出显示过滤后的文本

Question

我在我的应用中实现了 SearchView 小部件。它工作正常。现在我需要做的是，每当我在 SearchView Bar 中输入一个单词时，过滤后的结果应该会突出显示搜索到的单词。喜欢：

我将这个 SearchView 小部件用作：

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.myMenu , menu);
    MenuItem searchItem = menu.findItem(R.id.action_search);
    SearchView sv = new SearchView(getActivity());

    // Changing the color of Searchview widget text field to white.     
    int searchSrcTextId = getResources().getIdentifier("android:id/search_src_text", null, null);  
    EditText searchEditText = (EditText) sv.findViewById(searchSrcTextId);  
    searchEditText.setTextColor(Color.WHITE); 

    sv.setOnQueryTextListener(this);
    searchItem.setActionView(sv);
    super.onCreateOptionsMenu(menu, inflater);
}

Answer 1

您可以为此使用 Spannable TextView。 希望这个方法对你有帮助

方法：

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;
}

return originalText 将突出显示文本。

Answer 2

您应该在 onBindViewHolder() 方法中执行此操作（使用 RecyclerView）

类 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);
        }

    }

您的过滤器（在适配器中）

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

Answer 3

您可以使用它来突出显示所有关键字。

 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);
                }
            }
        }
    });