如何在android中突出顯示搜索/過濾的文本？

Question

過濾文字工作正常，但現在我的要求是要突出一些colour.How過濾的文字在我的代碼

的代碼是這樣實現的： 過濾方法是在適配器類：

public class StudentAdapter extends RecyclerView.Adapter<StudentAdapter.ContestHolder> implements View.OnClickListener { 
List<Student_model> data = new ArrayList<>(); 
List<Student_model> templist; 
int expandedPosition = -1; 
int prev = -2; 
Context context; 
student_fragment student_fragment; 
Student_model contest; 
String url = "http://labsls.com/drill/index.php/questionpool/deleteusers"; 

public class ContestHolder extends RecyclerView.ViewHolder { 
    public TextView title, sub, school, name, password, username, email, phonenum, stdlvl, std, scl; 
    public RelativeLayout details, titlebar; 
    public Button update, home; 
    public ImageView image, tick; 
    EditText stdnmedi, useredi, passwordedi, emailedi, phoneedi, stndrdedi, schooledi; 

    public ContestHolder(View v) { 
     super(v); 
     title = (TextView) v.findViewById(R.id.studenttitle); 
     sub = (TextView) v.findViewById(R.id.standardsub); 
     std = (TextView) v.findViewById(R.id.std); 
     scl = (TextView) v.findViewById(R.id.skool); 
     home = (Button) v.findViewById(R.id.homebt); 
     details = (RelativeLayout) v.findViewById(R.id.detials); 
     titlebar = (RelativeLayout) v.findViewById(R.id.titlebar); 
     name = (TextView) v.findViewById(R.id.stdname); 
     stdnmedi = (EditText) v.findViewById(R.id.namedi); 
     useredi = (EditText) v.findViewById(R.id.ediuser); 
     update = (Button) v.findViewById(R.id.updatebt); 
     passwordedi = (EditText) v.findViewById(R.id.passuser); 
     emailedi = (EditText) v.findViewById(R.id.ediemail); 
     phoneedi = (EditText) v.findViewById(R.id.ediphone); 
     stndrdedi = (EditText) v.findViewById(R.id.edistd); 
     schooledi = (EditText) v.findViewById(R.id.edischoolz); 
     tick = (ImageView) v.findViewById(R.id.imgtic); 
    } 
} 

public StudentAdapter(Context context, List<Student_model> data, student_fragment student) { 
    this.context = context; 
    this.data = data; 
    this.student_fragment = student; 
    this.templist = new ArrayList<>(data); 
} 

@Override 
public ContestHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.student_list, parent, false); 
    ContestHolder holder = new ContestHolder(v); 
    holder.titlebar.setOnClickListener(StudentAdapter.this); 
    holder.titlebar.setTag(holder); 
    return holder; 
} 

@Override 
public void onBindViewHolder(final ContestHolder holder, final int position) { 
    contest = data.get(position); 
    holder.title.setText(contest.getTitle()); 
    holder.std.setText(" " + contest.getStdlevel()); 
    holder.scl.setText(" " + contest.getSchool()); 
    holder.stdnmedi.setText(contest.getTitle()); 
    holder.useredi.setText(contest.getUsername()); 
    holder.phoneedi.setText(contest.getPhonenum()); 
    holder.passwordedi.setText(contest.getPassword()); 
    holder.emailedi.setText(contest.getEmail()); 
    holder.stndrdedi.setText(contest.getStdlevel()); 
    holder.schooledi.setText(contest.getSchool()); 
    holder.home.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      context.startActivity(new Intent(context, Landing.class)); 
     } 
    }); 
    holder.titlebar.setOnLongClickListener(new View.OnLongClickListener() { 

     @Override 
     public boolean onLongClick(View view) { 
      data.get(position).setSelect(!data.get(position).isSelect()); 
      holder.tick.setVisibility(data.get(position).isSelect() ? View.VISIBLE : View.GONE); 
      showremove(); 
      return true; 
     } 
    }); 
    holder.update.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      String ur = "http://labsls.com/drill/index.php/questionpool/updateuserdetails"; 
      StringRequest stringrequest = new StringRequest(Request.Method.POST, ur, new Response.Listener<String>() { 

       @Override 
       public void onResponse(String response) { 
        Log.d("testup", response); 
        try { 
         JSONObject object = new JSONObject(response); 
         JSONArray array = object.getJSONArray("response"); 
         for (int i = 0; i < array.length(); i++) { 
          JSONObject Objectz = array.getJSONObject(i); 
          String namee = Objectz.getString("fullname"); 
          holder.stdnmedi.setText(namee); 
          String usere = Objectz.getString("username"); 
          holder.useredi.setText(usere); 
          String passe = Objectz.getString("password"); 
          holder.passwordedi.setText(passe); 
          String emaile = Objectz.getString("email_id"); 
          holder.emailedi.setText(emaile); 
          String phonee = Objectz.getString("mobile"); 
          holder.phoneedi.setText(phonee); 
          String stlvle = Objectz.getString("standardlevel"); 
          holder.stndrdedi.setText(stlvle); 
         } 
        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 
       } 
      }, new Response.ErrorListener() { 
       @Override 
       public void onErrorResponse(VolleyError error) { 
        Toast.makeText(context, error.toString(), Toast.LENGTH_SHORT).show(); 
       } 
      }) { 
       @Override 
       protected Map<String, String> getParams() { 
        Map<String, String> params = new HashMap<String, String>(); 
        // params.put("nAme",holder.stdnmedi.getText().toString()); 
        params.put("uName", holder.useredi.getText().toString()); 
        params.put("pAwd", holder.passwordedi.getText().toString()); 
        // params.put("eMail",holder.emailedi.getText().toString()); 
        params.put("mobile", holder.phoneedi.getText().toString()); 
        params.put("school", holder.schooledi.getText().toString()); 
        params.put("standardlevel", holder.stndrdedi.getText().toString()); 
        params.put("uID", contest.getUseruniq()); 
        return params; 
       } 
      }; 
      stringrequest.setRetryPolicy(new DefaultRetryPolicy(DefaultRetryPolicy.DEFAULT_TIMEOUT_MS * 2, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)); 
      RequestQueue requestQueue = Volley.newRequestQueue(context); 
      requestQueue.add(stringrequest); 
      Toast.makeText(context, holder.stdnmedi.getText().toString(), Toast.LENGTH_SHORT).show(); 
     } 
    }); 
    if (position == expandedPosition) { 
     holder.details.setVisibility(View.VISIBLE); 
    } else { 
     holder.details.setVisibility(View.GONE); 
    } 
} 

public void filter(String query) { 
    data.clear(); 
    Log.d("Test", "1"); 
    if (query.length() == 0) { 
     data.addAll(templist); 
    } else { 
     String filterPattern = query.toLowerCase().trim(); 
     for (Student_model app : templist) { 
      if (app.getTitle().toLowerCase().contains(filterPattern)) { 
       data.add(app); 
      } 
     } 
     notifyDataSetChanged(); 

    } 
} 

，其中在適配器類的過濾器的方法被調用時的類：

SearchView.OnQueryTextListener listener = new SearchView.OnQueryTextListener(){ 
    @Override 
    public boolean onQueryTextSubmit(String query){ 
     return false; 
    } 

    @Override 
    public boolean onQueryTextChange(String newText) { 
     adapter.filter(newText); 
     return true; 
    } 
}; 

Answer 1

1. in StudentAdapter create global variable; 
    String searchString=""; 
2. in method filter(String query), asign searchString=query; 
3. in onBindViewHolder() method, put below code. 



SpannableString spannableStringSearch = null; 

if ((searchString!= null) && (!searchString.isEmpty())) {   
     spannableStringSearch = new SpannableString(contest.getTitle()); 
    Pattern pattern = Pattern.compile(searchString, Pattern.CASE_INSENSITIVE); 
    Matcher matcher = pattern.matcher(contest.getTitle()); 
    while (matcher.find()) { 
      spannableStringSearch.setSpan(new ForegroundColorSpan(
          ContextCompat.getColor(context, R.color.red)), 
      matcher.start(), matcher.end(), 
      Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 
    } 
} 
if(spannableStringSearch !=null){ 
    holder.title.setText(spannableStringSearch); 
} 
else{ 
    holder.title.setText(spannableStringSearch); 
}