在AsyncTask中加載自定義列表視圖

Question

我正在使用doInBackground部分的代碼從數據庫加載自定義列表視圖，現在我已將其添加到AsynchTask，當對話框被解除時它什麼也不顯示。有誰知道我在做什麼錯了，所以，當進度條再次駁斥它會顯示我的名單：

private class LoadList extends AsyncTask<String, UserRecord, JSONArray> { 
    protected JSONArray doInBackground(String... link) { 
     //http post 
     try{ 
      HttpClient httpclient = new DefaultHttpClient(); 
      HttpPost httppost = new HttpPost("http://wallpaperapp.x10.mx/new.php"); 
      httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
      HttpResponse response = httpclient.execute(httppost); 
      HttpEntity entity = response.getEntity(); 
      is = entity.getContent(); 
     }catch(Exception e){ 
      Log.e("log_tag", "Error in http connection"+e.toString()); 
     } 

     //convert response to string 
     try{ 
      BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8); 
      sb = new StringBuilder(); 
      sb.append(reader.readLine() + "\n"); 

      String line="0"; 
      while ((line = reader.readLine()) != null) { 
       sb.append(line + "\n"); 
      } 
      is.close(); 
      result=sb.toString(); 
     }catch(Exception e){ 
      Log.e("log_tag", "Error converting result "+e.toString()); 
     } 

     try{ 
      jArray = new JSONArray(result); 
      JSONObject json_data=null; 

      displayname = new String[jArray.length()]; 
      song_name = new String[jArray.length()]; 
      artist = new String[jArray.length()]; 
      description = new String[jArray.length()]; 
      genre = new String[jArray.length()]; 
      custom_genre = new String[jArray.length()]; 
      album = new String[jArray.length()]; 
      timestamp = new String[jArray.length()]; 
      song_id = new int[jArray.length()]; 
      avatar = new String[jArray.length()]; 
      drawable = new Drawable[jArray.length()]; 
      test_rating = new Float[jArray.length()]; 
      songurl = new String[jArray.length()]; 

      for(int i=0;i<jArray.length();i++){ 
       json_data = jArray.getJSONObject(i); 
       song_id[i]=json_data.getInt("id"); 
       song_name[i]=json_data.getString("songname"); 
       artist[i]=json_data.getString("artist"); 
       displayname[i]=json_data.getString("displayname"); 
       description[i]=json_data.getString("description"); 
       genre[i]=json_data.getString("genre"); 
       custom_genre[i]=json_data.getString("customgenre"); 
       album[i]=json_data.getString("album"); 
       timestamp[i]=json_data.getString("format"); 
       avatar[i]=json_data.getString("image_url"); 
       songurl[i]=json_data.getString("song_url"); 
       drawable[i] = LoadImageFromWebOperations(avatar[i]); 
       test_rating[i] = (float) json_data.getDouble("rating"); 
       user5 = new UserRecord(genre[i], displayname[i], timestamp[i], drawable[i], test_rating[i], songurl[i]); 

       publishProgress(user5); 

      } 
     } 
     catch(JSONException e1){ 
      Toast.makeText(getBaseContext(), "No results found." ,Toast.LENGTH_LONG).show(); 

     } catch (ParseException e1) { 
      e1.printStackTrace(); 
     }   

     return null; 
    } 

    protected void onProgressUpdate(UserRecord... progress) { 
     users.add(user5); 

    } 

    protected void onPostExecute(JSONArray jArray) { 
     dialog.dismiss(); 
    } 

    protected void onPreExecute(){ 
     dialog = ProgressDialog.show(mainmenu.this, "", 
       "Loading. Please wait...", true); 
    } 
} 

這裏是我的onCreate：

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.newsmain);  

    nameValuePairs = new ArrayList<NameValuePair>(); 
    users = new ArrayList<UserRecord>();     

    ListView listView = (ListView) findViewById(R.id.ListViewId); 

    songname = (TextView) findViewById(R.id.tvTrack); 
    songimage = (ImageView) findViewById (R.id.imageView1); 
    playbutton = (Button) findViewById (R.id.playbutton1); 
    downloadbutton = (Button) findViewById (R.id.downloadbutton3); 
    listView.setAdapter(new UserItemAdapter(this, android.R.layout.simple_list_item_1, users)); 
    flipper = (ViewFlipper) findViewById(R.id.tab2); 
    //when a view is displayed 
    flipper.setInAnimation(this,android.R.anim.fade_in); 
    //when a view disappears 
    flipper.setOutAnimation(this, android.R.anim.fade_out); 

    screenWidth = getResources().getDisplayMetrics().widthPixels; 
    new LoadList().execute(); 
      } 

，這是獲得公佈的UserRecord：

public class UserRecord { 
    public String genrez; 
    public String displaynamez; 
    public String timestampz; 
    public Drawable image_urlz; 
    public Float test_ratingz; 
    public String songurlz; 

    public UserRecord(String genrez, String displaynamez, String timestampz, Drawable image_urlz, Float test_rating, String songurlz) { 
     this.genrez = genrez; 
     this.displaynamez = displaynamez; 
     this.timestampz = timestampz; 
     this.image_urlz = image_urlz; 
     this.test_ratingz = test_rating; 
     this.songurlz = songurlz; 

    } 
} 

Answer 1

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

} 

請把列表視圖代碼此功能，是指將數據綁定到列表視圖

Answer 2

將此添加到我的onPostExecute工作！我很高興我明白了......謝謝

listView.setAdapter(new UserItemAdapter(mainmenu.this, android.R.layout.simple_list_item_1, users));