从ListView - Android搜索功能后获取位置项

Question

这里我有一个来自url的解析json数据并添加到具有搜索功能的listview中。当通过搜索功能获取项目时，setOnItemClickListener不能从listview获得正确的位置项，但是没有搜索功能的OnItemClick工作正常。

            for (int i = 0; i < jArray.length(); i++) {
                final JSONObject json_data = jArray.getJSONObject(i);
                final String fname = json_data.getString("fname");
                final String lname = json_data.getString("lname");
                final String username = json_data.getString("username");
                final String gender = json_data.getString("gender");

                HashMap<String, String> contact = new HashMap<>();

                contact.put("fname", fname);
                contact.put("lname", lname);
                contact.put("username", username);
                contact.put("gender", gender);
                users.add(contact);

                simpleAdapter = new SimpleAdapter(SearchActivity.this, users,
                        R.layout.list_search_item, new String[]{"fname","lname"},
                        new int[]{R.id.fname,R.id.lname});
                lv.setAdapter(simpleAdapter);

                lv.setTextFilterEnabled(true);

                Search.addTextChangedListener(new TextWatcher() {

                    @Override
                    public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
                        SearchActivity.this.simpleAdapter.getFilter().filter(cs);
                    }

                    @Override
                    public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
                    }

                    @Override
                    public void afterTextChanged(Editable arg0) {
                    }
                });

                lv.setOnItemClickListener(new AdapterView.OnItemClickListener(){
                    @Override
                    public void onItemClick(AdapterView<?> parent , View view , int position , long id){
                        Intent i = new Intent(SearchActivity.this,UserProfileActivity.class);
                        i.putExtra("fname",users.get(position).get("fname"));
                        i.putExtra("lname",users.get(position).get("lname"));
                        i.putExtra("username",users.get(position).get("username"));
                        i.putExtra("gender",users.get(position).get("gender"));
                        startActivity(i);
                    }
                });

            }