Android动态自动完成don'；不显示

我需要代码方面的帮助，我试图实现一个自动完成的文本视图，但不起作用

我使用一个asyntask和一个httpclient从google获取信息

我的代码是：

公共类MainActivity扩展了活动{

AutoCompleteTextView text_search;
ArrayAdapter<String> adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    text_search = (AutoCompleteTextView)this.findViewById(R.id.tx_search);


    ArrayList<String> entries = new ArrayList<String>(Arrays.asList("Dowgo"));
    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, entries);



    text_search.setAdapter(adapter);
    text_search.setThreshold(1);

    adapter.setNotifyOnChange(true);



    text_search.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {



            new AsyncTask<String,Void,String[]>(){

                @Override
                protected void onPreExecute() {
                    text_search.setAdapter(null);
                }

                @Override
                protected String[] doInBackground(String... strings) {
                    int lon = strings.length;
                    if (lon<1) return null;

                    String busqueda = strings[0];
                    String url = "http://clients1.google.com/complete/search";

                    if (busqueda.length() < 2) return null;

                    HttpClient httpclient = new DefaultHttpClient();


                    httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:22.0) Gecko/20100101 Firefox/22.0");

                    if(!url.endsWith("?"))
                        url += "?";

                    List<NameValuePair> params = new LinkedList<NameValuePair>();


                        params.add(new BasicNameValuePair("q", busqueda));
                        params.add(new BasicNameValuePair("nolabels", "t"));
                        params.add(new BasicNameValuePair("client", "youtube"));
                        params.add(new BasicNameValuePair("ds", "yt"));

                    String paramString = URLEncodedUtils.format(params, "utf-8");

                    url += paramString;


                    HttpGet httpget = new HttpGet(url);

                    //httpget.addHeader("Accept-Language", "es");

                    ArrayAdapter adaptador;
                    try {



                        // Execute HTTP Post Request
                        HttpResponse response = httpclient.execute(httpget);


                        if(response.getStatusLine().getStatusCode() != 200) return null;

                        HttpEntity resEntityGet = response.getEntity();

                        String respuesta = EntityUtils.toString(resEntityGet);



                        respuesta = respuesta.substring(respuesta.indexOf("[["), respuesta.indexOf("]]") + 2);


                        String[] resultados = respuesta.split(",");

                        int lens = 0;

                        if(resultados.length%2==0)  lens = resultados.length/2;
                        else lens = (resultados.length-1)/2;

                        String[] sugeridos = new String[lens];

                        int con = 0;
                        for(int x=0;x<resultados.length-1;x+=2){
                            sugeridos[con] = resultados[x].replace("[","").replace("\"","");
                            con++;
                        }

                        Log.d("Respuesta",respuesta);


                        return  sugeridos;

                    } catch (ClientProtocolException e) {
                        return null;
                    } catch (IOException e) {
                        return null;
                    }


                }

                @Override
                protected void onPostExecute(String[] result) {

                    if (result != null){



                        adapter.clear();
                        for(int x=0;x<result.length;x++) {
                            adapter.add(result[x]);
                        }
                        adapter.notifyDataSetChanged();
                        text_search.showDropDown();
                    }else{

                        adapter.clear();
                        adapter.notifyDataSetChanged();

                    }



                }

            }.execute(charSequence.toString());


        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    });

}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

AutoCompleteTextView文本搜索；
阵列适配器；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
text\u search=（AutoCompleteTextView）this.findviewbyd（R.id.tx\u search）；
ArrayList条目=新的ArrayList（Arrays.asList（“Dowgo”）；
adapter=new ArrayAdapter（这是android.R.layout.simple\u list\u item\u 1，条目）；
text_search.setAdapter（适配器）；
文本搜索设置阈值（1）；
adapter.setNotifyOnChange（true）；
text_search.addTextChangedListener（新的TextWatcher（）{
@凌驾
更改前的公共无效（CharSequence CharSequence，int i，int i2，int i3）{
}
@凌驾
public void onTextChanged（CharSequence CharSequence，int i，int i2，int i3）{
新建异步任务（）{
@凌驾
受保护的void onPreExecute（）{
text_search.setAdapter（null）；
}
@凌驾
受保护的字符串[]doInBackground（字符串…字符串）{
int lon=strings.length；
如果（lonIt）不清楚您在问什么。您是否遇到错误？运行应用程序时发生了什么？您是否尝试过使用调试器进行调试，如果是，您希望看到什么以及应用程序偏离了什么？我认为您需要重复文本\u search.setAdapter（adapter）；当您更新适配器时。在onPostExecutr结尾处重复此操作。感谢您的帮助，很抱歉我的英语不好，我添加了以下行：text_search.setAdapter（适配器）；text_search.showDropDown（）；onPostExecutr，再次感谢您。；）