Android - AutoCompleteTextView动态更新问题

时间:2011-11-23 13:33:09

标签: android android-arrayadapter autocompletetextview

我正在尝试使用TextWathcer每次更改文本时动态更新autoCompleteTextview ArrayAdapter。

每次文本更改时,新的AsyncTask中都会有一个http请求,而来自异步任务的回调(onPostExecute)我会从适配器调用clear()并向他添加新项,然后调用notifyDataSetChanged。 不幸的是,从未显示自动完成下拉..

拜托,我去哪儿了?!

这是代码:

AutoCompleteTextView acCountry = (AutoCompleteTextView)layout.findViewById(R.id.autoComplete);
final ArrayAdapter<RMAutoComplete.ListItem> countriesAdapter = new ArrayAdapter<RMAutoComplete.ListItem>(this.context,android.R.layout.simple_dropdown_item_1line);
acCountry.addTextChangedListener(new TextWatcher() {

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (s.length() > 1)
                {
                    new AsyncTask<String, Void, List<RMAutoComplete.ListItem>>(){

                        @Override
                        protected List<ListItem> doInBackground(String... params) {
                            List<ListItem> l = null;
                            try {
                                l = location.getCountryData(params[0]);
                            } catch (Exception e) {
                                Log.e(TAG,"error when getCountryData",e);
                            }
                            return l;
                        }

                        @Override
                        protected void onPostExecute(List<ListItem> countries) {
                            countriesAdapter.clear();
                            if (countries != null)
                                for (ListItem listItem : countries) {
                                    countriesAdapter.add(listItem);
                                }
                            countriesAdapter.notifyDataSetChanged();
                        }
                    }.execute(s.toString());
                }
            }

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

            public void afterTextChanged(Editable s) {}
        }
    );

1 个答案:

答案 0 :(得分:3)

常见错误:您是否将适配器设置为acCountry

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