@Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_stock_check_list);
   listView = (ListView) findViewById(R.id.listView);
   if (pd == null) pd = ProgressDialog.show(this, null, "正在检索数据");
   client = ReqClient.newInstance();
   request = (Request) getIntent().getSerializableExtra("Request");
   new Thread(
           new Runnable() {
             @Override
             public void run() {
               try {
                 client.connectServer(
                     SuperClient.getCurrentIP(),
                     SuperClient.getCurrentPort(),
                     SuperClient.getCurrentLoginRequest());
                 String billListJson = client.requestData(request);
                 log.i(billListJson);
                 StockCheckListResp stockCheckListResp =
                     CommonUtil.getGson().fromJson(billListJson, StockCheckListResp.class);
                 if (stockCheckListResp != null) {
                   if (stockCheckListResp.isCorrect()) {
                     if (adapter == null) {
                       adapterData = stockCheckListResp.getListData();
                     } else {
                       adapterData.addAll(stockCheckListResp.getListData());
                     }
                     handler.sendEmptyMessage(RESULT_OK);
                   } else {
                     CommonUtil.showToastError(
                         StockCheckListActivity.this, stockCheckListResp.getErrMessage(), null);
                   }
                   handler.sendEmptyMessage(RESULT_OK);
                 }
               } catch (Exception e) {
                 e.printStackTrace();
                 handler.sendEmptyMessage(RESULT_CANCELED);
               } finally {
                 client.close();
               }
             }
           })
       .start();
   listView.setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
   listView.setOnItemClickListener(
       new AdapterView.OnItemClickListener() {
         @Override
         public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
           ((ListView) parent).setItemChecked(position, true);
         }
       });
 }