code: public static boolean isNumberic(Object obj) {
          if (obj == null) {
              Log.e("isNumeric", "parameter can't be null.");
              return false;
          }
  
          try {
              Double.parseDouble(obj.toString());
          } catch (Exception e) {
              return false;
          }
  
          return true;
      }
docs: 可检测 正数,负数,小数 {10进制}, 16进制数字.{0x}
  
  @param obj
  @return