TextWatcher在api调用期间跳过字符

Question

以下代码是我的android应用中搜索框的一部分。 LoadCatalog是api调用的异步任务，问题是，每当它被调用时editText就会停止获取新字符一秒钟（跳过中间的一个字符）。

例如，如果用户要输入“ Leaf the book” ...         有时只需要输入“ The boo”或“ bookof”

它跳过字符，请提示我的代码出了什么问题。

private TextWatcher productEntered = new TextWatcher() {
    long lastChange = 0;

    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    public void onTextChanged(CharSequence enteredSequence, int start, int before, int count) {
        searchbarActionClear.setVisibility(View.VISIBLE);
        enteredText = enteredSequence;



        if (CommonUtils.isConnectingToInternet(DashboardActivity.this)) {
            if (enteredText.length() > 3) {
                new Handler().postDelayed(new Runnable() {
                    public void run() {
                        if (System.currentTimeMillis() - lastChange >= 600) {
                            resetList();
                            toolbarSuggestionEditText.setTag(toolbarSuggestionEditText.getKeyListener());
                            toolbarSuggestionEditText.setKeyListener(null);
                            new LoadCatalog().execute(String.valueOf(enteredText));
                        }
                    }
                }, 600);
                lastChange = System.currentTimeMillis();
            }
        }
    }


    public void afterTextChanged(Editable s) {
    }
};



   private class LoadCatalog extends AsyncTask<String, Void, CustomResponse> {
    @Override
    protected CustomResponse doInBackground(String... params) {
        String url;
        if (categoryItem != null) {
            url = String.format(AppConstants.URLs.SEARCH_WITH_CATEGORY, params[0], categoryItem);
        } else {

            url = String.format(AppConstants.URLs.SEARCH, params[0]);
        }

        CustomResponse response = HttpRequest.GET_REQUEST(url, DashboardActivity.this);

        return response;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected void onPostExecute(CustomResponse result) {
        try {
            if (result.getResponseCode() == 200) {

                JSONArray jsonArray = null;
                jsonArray = new JSONArray(result.getResponseBody());
                Suggestion suggestion = null;
                if (jsonArray.length() > 0) {
                    suggestionList.clear();
                    suggestionList.add(new Suggestion(null, Suggestion.TYPE_SUGGESTION_HEADER));
                    for (int i = 0; i < jsonArray.length(); i++) {
                        JSONObject jsonObject = jsonArray.getJSONObject(i);

                        suggestion = new Suggestion(jsonObject.getString("name"),
                                jsonObject.getString("category"),
                                Suggestion.TYPE_SUGGESTION);
                        suggestionList.add(suggestion);
                        suggestionAdapter.notifyDataSetChanged();
                    }

                    toolbarSuggestionEditText.setKeyListener((KeyListener) toolbarSuggestionEditText.getTag());

                } else {

                    toolbarSuggestionEditText.setKeyListener((KeyListener) toolbarSuggestionEditText.getTag());
                    Toast.makeText(DashboardActivity.this, "No item match with your search", Toast.LENGTH_SHORT).show();
                    suggestionList.clear();

                }
            } else {

                toolbarSuggestionEditText.setKeyListener((KeyListener) toolbarSuggestionEditText.getTag());
            }
        } catch (JSONException e) {

            toolbarSuggestionEditText.setKeyListener((KeyListener) toolbarSuggestionEditText.getTag());
            e.printStackTrace();
        }
    }
}