android从Asynctask更新列表视图中行的文本视图[重复]

Question

您好所有安卓开发者
我尝试在单击下载按钮时执行内容下载，然后更新该行的 Textview 以显示下载状态

  public OnlineStoreAdapter extends
    ArrayAdapter<MusicDownloadStructure>{ 
    public View getView(int position, View view, ViewGroup parent) {
        // TODO Auto-generated method stub
        final MusicDownloadStructure data = ModelDownloadData[position];
         .
         .
        Downloadbtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            downloadmanager = new ModelDownload(URL, data);
           downloadmanager.execute();
        }
   }
}

public class ModelDownload extends AsyncTask<Object, Long, Boolean> {

     public ModelDownload(String URL, MusicDownloadStructure downloadStructure) {
        connectionurl = URL;
        DownloadStructure = downloadStructure;
    }
     protected void onPostExecute(Boolean result) {
        // TODO Auto-generated method stub
        TextView statusTextView = DownloadStructure.getStatusTextView();
        statusTextView.setText(TitleStirng);
    }

我在数据对象中保持目标文本视图的引用并在 Asynctask 中更改文本，但我不知道为什么文本没有更改没人能帮忙？ 坦克

Answer 1

尝试拨打notifyDataSetChanged：

        protected void onPostExecute(Boolean result) {
            ...
            myListView.notifyDataSetChanged(); //or simply notifyDataSetChanged if your Async inside adapter
        }