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我正在使用 simpleAdapter 在 listView 中显示名称。我想添加一个edittext小部件以允许用户过滤他们想要查找的名称。但是，我不知道该怎么做。有人可以解释我怎么能做到这一点。这是我的代码：

   import java.util.ArrayList;
   import java.util.HashMap;
   import java.util.jar.Attributes.Name;

   import org.apache.http.NameValuePair;
   import org.json.JSONArray;
   import org.json.JSONException;
   import org.json.JSONObject;

   import android.app.Dialog;
   import android.app.ListActivity;
   import android.app.ProgressDialog;
   import android.os.AsyncTask;
   import android.os.Bundle;
   import android.text.Editable;
   import android.text.TextWatcher;
   import android.util.Log;
   import android.view.View;
   import android.widget.AdapterView;
   import android.widget.AdapterView.OnItemClickListener;
   import android.widget.EditText;
   import android.widget.ListAdapter;
   import android.widget.ListView;
   import android.widget.SimpleAdapter;
   import android.widget.SimpleCursorAdapter;
   import android.widget.TextView;
   import android.widget.Toast;

   public class Patients extends ListActivity{

  private static final String ID = "id";
  private static final String NAME = "name";
  private static final String PATIENTS = "patients";


  private ProgressDialog dialog;

      private EditText search; 

   //URL to get the patient info
   private static final String URL = "http://10.0.2.2:8080/HMS2/patients.php";

   ListAdapter adapter;

    //for getting the parse  data
        JSONParser jParser = new JSONParser();


   // patients JSON ARRAY 
   JSONArray patients = null;

  ArrayList<HashMap<String, String>> patientsList;

 @Override
 protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.all_patients);

    search = (EditText) findViewById(R.id.inputSearch);

    new LoadPatients().execute();

    //selecting single listView
    ListView list = getListView();

    list.isTextFilterEnabled();

    list.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> arg0, View view, int position,
                long id) {

            String name = ((TextView) findViewById(R.id.name)).getText().toString();
        }

    });

} 

 class LoadPatients extends AsyncTask<String, String, String>
  {

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

        dialog = new ProgressDialog(Patients.this);
        dialog.setMessage("Loading patients info...");
        dialog.setIndeterminate(false);
        dialog.setCancelable(false);
        dialog.show();
    }


    @Override
    protected String doInBackground(String... params) {

        //HashMap for ListView
        patientsList = new ArrayList<HashMap<String,String>>();

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


        ArrayList<NameValuePair> query = new ArrayList<NameValuePair>();

        //gets the JSON object 
        JSONObject json = jParser.getJSONFromUrl(URL, query, "POST");

        Log.e("error",json.toString());

        try 
          {
            //gets the JSON array which is patients 
            patients = json.getJSONArray(PATIENTS);

            //loop through the JSON array
            for(int x= 0; x < patients.length(); x++)
             {
                //gets the  key=> value position 
                JSONObject key = patients.getJSONObject(x);

                //gets the id value 
                int value = key.getInt(ID);
                String id = Integer.toString(value);

                //gets the name value
                String name = key.getString(NAME);

                //put the key => value in a HashMap
                map.put(NAME,  name);
                map.put(ID, id);

                //add the HashMap values to the ArrayList
                patientsList.add(map);

             }
          }
        catch (JSONException e) 
         {  
            Toast.makeText(getApplicationContext(), "Connection problem", Toast.LENGTH_LONG);
         }


        return null;
    }


    @Override
    protected void onPostExecute(String result) 
     {
        super.onPostExecute(result);

          //dismiss the dialog after getting all products
          dialog.dismiss();


          adapter = new SimpleAdapter(getApplicationContext(),patientsList,R.layout.list_item,
                        new String[]{NAME}, new int[]{R.id.name});

          setListAdapter(adapter);              

        }


     }

    }
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1 回答 1

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最好的方法可能是向 EditText 小部件添加一个TextWatcher，然后使用由 SimpleAdapter 实现的Filterable接口。不过，这可能有点痛苦，因此您可能会发现自己处理过滤更容易，方法是为您的适配器创建一个新列表，并在用户键入时，将该列表中的值设置为与搜索查询匹配的原始列表。每次更新适配器使用的列表时，您都希望使数据无效，因此将重新创建列表。

于 2012-11-13T03:38:38.140 回答