想要更新或刷新列表視圖

enter image description here

它是一種基於無線應用的

在

當圖像的AsyncTask使用者開關將被調用，音樂將播放和獲取一些信息將被替換爲AMIT SIDDHPURA文本

以下是我的代碼

holder.imgPlay.setOnClickListener(new View.OnClickListener() { 

       @Override 
       public void onClick(View v) { 

        new MetadataTask2().execute(holder.txtMetadata); 



          } 

    class StreamHolder { 
     TextView txtStreamName; 
     TextView txtStream; 
     TextView txtMetadata; 
     ImageView imgPlay; 
    }

而且MetaDataTask2類代碼是下面

class MetadataTask2 extends AsyncTask<TextView, Void, IcyStreamMeta> { 
    String title_artist; 
    TextView txtView; 

    @Override 
    protected com.example.xmlparsingex.IcyStreamMeta doInBackground(TextView... arg0) { 
     txtView = arg0[0]; 

     return streamMeta; 
    } 

    @Override 
    protected void onPostExecute(IcyStreamMeta result) { 
     try { 
      txtView.setText("Hiiiiiiiiiii............"); 
      MCObjectMetadata.cancel(); 
      MCObjectMetadata = new MyCounterMetadata(10000, 1000); 
      MCObjectMetadata.start(); 

      **adapter.notifyDataSetChanged(); 
      mainListView.setAdapter(adapter); 
      mainListView.invalidate();** 

      startService(new Intent(CompaniesList.this, NotifyService.class)); 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

    } 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     try { 
      PD = ProgressDialog.show(CompaniesList.this, "Tuning...", "Please Wait..."); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 
}

但問題是，列表視圖不更新裝置，其在列表視圖顯示橙色文本不與替換Hiiiiiii

來源

2013-02-14 Siddhpura Amit