listview點擊item后跳轉到詳細頁面后返回listview數據不顯示問題

原因：

觸發返回按鈕后跳轉到listview主界面，數據要重新加載，這時要想加載數據，就要在啟動Activity的時候程序自動加載，而handler里面寫的是主線程，一定會執行，所以在后面添加

 /**
   * 處理消息(主線程),更新適配器，如果在Thread里處理可能會出錯
   * */
   handler = new Handler() {

    @Override
    public void handleMessage(Message msg) {
     switch (msg.what) {
     case Util.DOWNLOAD_START:
      progressDialog.show();
//      progressDialog.SetMessage(msg.getData().get("text")
//        .toString());
      Toast.makeText(CheckOrderActivity.this, Util.CurrentMessage,
        Toast.LENGTH_LONG).show(); 
      break;
     case Util.DOWNLOAD_END:
      progressDialog.dismiss();
      break;
     case Util.DOWNLOAD_OK:
      threadContinue=false;//結束線程
      Toast.makeText(CheckOrderActivity.this, Util.CurrentMessage,
        Toast.LENGTH_LONG).show(); 
      SetDatatoUI();
      progressDialog.dismiss();
      break;
     case Util.DOWNLOAD_ERROR:
      progressDialog.dismiss();
      Toast.makeText(CheckOrderActivity.this, "沒有賬單信息", Toast.LENGTH_LONG)
        .show();
      break;
     case Util.DOWNLOAD_DISCONNECT:
      progressDialog.dismiss();
      AlertDialog.Builder builder = new Builder(CheckOrderActivity.this);
      builder.setMessage("未連接上網絡!");
      builder.setTitle("提示");
      builder.setPositiveButton("確認",
        new DialogInterface.OnClickListener() {
         @Override
         public void onClick(DialogInterface dialog,
           int which) {
          dialog.dismiss();
         }
        });
      builder.create().show();
      break;
     }
     super.handleMessage(msg);//執行父類的方法
    }
   };

adapter = new MyAdapterr(CheckOrderActivity.this, Fieldlist);
   search();//向服務請求數據
 }

即可成功解決。