public void showCityList() {
    if (!dbManager.isTableExists("storecity.db", "storecity")) {
      dbManager.execSQL(
          "storecity.db",
          "create table storecity(_id integer primary key autoincrement,city varchar(20))");
    }
    // 获取城市列表,显示到listview中
    Cursor cursor = dbManager.openQuery("storecity.db", "select _id,city from storecity");
    List<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();
    while (cursor.moveToNext()) {
      HashMap<String, Object> hash = new HashMap<String, Object>();
      String cityName = cursor.getString(cursor.getColumnIndex("city"));
      hash.put("cityname", cityName);
      hash.put("btn1", "");
      hash.put("delbtn", "删除");
      list.add(hash);
    }
    CityListItemSimpleAdapter listadapter =
        new CityListItemSimpleAdapter(
            NeedShowWethInfoCityListActivity.this,
            list,
            R.layout.need_show_wethinfo_city_listview_item,
            new String[] {"cityname", "btn1", "delbtn"},
            new int[] {R.id.storeListview, R.id.button1, R.id.delbutton, R.id.imageview1});

    listView.setAdapter(listadapter);
  }