AutoCompleteTextView强制显示所有项目或禁用过滤

Question

AutoCompleteTextView根据我输入的第4个字母，我设法管理了一个应该提供我数据库中找到的所有城镇（维尔）的城市。

该Async task运作良好，并得到正确的数据。

我的问题是DropDownList显示不是所有项目。通常，DB返回的20个表中只有1、2、3或4个。

所以我想出了，ACTV本身应该有一些自动过滤功能！我在这里检查了许多主题，以更新我的代码，但是我没有成功.... :-(

我不断收到错误，却不知道到底是什么问题！:-(

• AutoCompleteTextView强制显示所有项目

• AutoCompleteTextView-禁用过滤

所以这是我的代码：

class MyActivity extends Activity implements AdapterView.OnItemClickListener
{
        static class Ville 
        {
            String id;
            String name;

            @Override
            public String toString() { return this.name; }
        };

        ArrayAdapter<Ville>    villeAdapter;
        String                 villeAdapterFilter;
        VilleUpdateTask        villeAdapterUpdateTask;
        AutoCompleteTextView   villeText;
        Ville                  selectedVille;

        final TextWatcher textChecker = new TextWatcher() {

            public void afterTextChanged(Editable s) {}

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

            public void onTextChanged(CharSequence s, int start, int before, int count)
            { 
                  MyActivity.this.setAdapterFilter(s.toString());
            }

        };

        public void onCreate(Bundle bundle)
        {
             super.onCreate(bundle);
             setContentView(R.layout.main);

             this.villeAdapter = new ArrayAdapter<Ville>(this,android.R.layout.simple_dropdown_item_1line, new Ville[0]);
             this.villeText = (AutoCompleteTextView ) findViewById(R.id.villeSelector);
             this.villeText.setAdapter(this.villeAdapter);
             this.villeText.setThreshold(THRESHOLD_DROPDOWN); 
             this.villeText.setOnItemClickListener(this);
             this.villeText.addTextChangedListener(textChecker);
        }

        public void onDestroy() { stopVilleAdapterUpdate(); 


        public void setAdapterFilter(String filter)
        {
             if (filter == null) {
                 // clearing the adapter
                 this.villeAdapterFilter = null;
                 this.villeAdapter.clear();
                 this.villeAdapter.notifyDataSetChanged();
                 Log.d("MyActivity","Clearing ville filter !");
             } else if (filter.length() > THRESHOLD_QUERY) {
                  if (this.villeAdapterFilter == null) {
                      Log.d("MyActivity","Ville Adapter Filter defined to:"+filter);
                      this.villeAdapterFilter = filter;
                      startVilleAdapterUpdate();
                  } else {
                      Log.d("MyActivity","Already filtered with:"+this.villeAdapterFilter);
                  }
             } else {
                  Log.d("MyActivity","Resetting filter (not enough data)");
                  this.villeAdapterFilter = null;
                 this.villeAdapter.clear();
                 this.villeAdapter.notifyDataSetChanged();
             }
        }

        public synchronized void onItemClick(ViewAdapter<?> ad, View v, int position, long id)
        {
             this.selectedVille = this.villeAdapter.getItemAtPosition(position);
             Log.d("MyActivity","Ville selected: "+this.selectedVille);
        }

        public synchronized void startVilleAdapterUpdate()
        {
              stopVilleAdapterUpdate();
              Log.d("MyActivity","Starting Update of Villes with "+this.villeAdapterFilter);
              this.villeAdapterUpdateTask = new VilleUpdateTask();
              this.villeAdapterUpdateTask.execute(this.villeAdapterFilter);
        }

        public synchronized void stopVilleAdapterUpdate()
        {
             if (this.villeAdapterUpdateTask != null) {
                 Log.d("MyActivity","Stopping current update of villes");
                 this.villeAdapterUpdateTask.cancel(true);
                 this.villeAdapterUpdateTask = null;
             }
        }

        public synchronized void onVilleAdapterUpdateResult(Ville[] data)
        {
             this.villeAdapterUpdateTask = null;
             if (data != null) {
                 Log.d("MyActivity","Received "+data.length+" villes from update task");
                 this.villeAdapter.clear();
                 this.villeAdapter.addAll(data);
                 this.villeAdapter.notifyDataSetChanged(); // mise à jour du drop down...
            }
        } 

        class VilleUpdateTask extends AsyncTask<String,Void,Ville[]>
        {
              public Ville[] doInBackground(String ... filters)
              {
                  ArrayList<Ville> values = new ArrayList<Ville>();
                  try  {
                       HttpClient httpclient = new DefaultHttpClient();
                       ....
                       ....
                       for(int i=0;i<json_array.length();i++) {
                           JSONObject json_ligne = json_array.getJSONObject(i);   
                           try {
                               Ville v = new Ville();
                               v.name = json_ligne.getString("NAME_VILLE");
                               v.id = json_ligne.getString("ID_VILLE");
                               values.add(v);
                           } catch (Exception ex) {
                               Log.w("VilleUpdateTask","Invalid value for Ville at index #"+i,ex);
                           }
                       }
                  } catch (Exception ex) {
                       Log.e("VilleUpdateTask","Failed to retrieve list of Ville !",ex);
                  }
                  return values.toArray(new Ville[values.size()]);
             }

             public void onPostExecute(Ville[] data)
             {
                 MyActivity.this.onVilleAdapterUpdateResult(data);
             }
        }

}

编辑1：是的，很抱歉，我的ACTV是基本的TextView，它不是滚动问题，因为在更好的情况下，我可以看到列表中的10个项目，并且最后一个位置是随机的

编辑2：您能否帮助我将现有代码改编为上述2个URL的给定解决方案？

（1）根据该解决方案AutoCompleteTextView-禁用过滤

我必须：

• 创建与给定类相同的类ClassMyACArrayAdapter，只是其名称更改

• 将我的声明从

  ArrayAdapter villeAdapter;

至

List<ClassMyACArrayAdapter> villeAdapter;

• 但是在onCreate中应该替换初始的

  this.villeAdapter =新的ArrayAdapter
  （this，android.R.layout.simple_dropdown_item_1line，新的Ville [0]）;

Answer 1

只要有autoCompleteTextView.showDropDown()需要就打电话.....欢呼:)