Question

这可能是更糟糕的问题，但似乎没有什么对我有用，我在Parse.com中有一个像这样的数据库（由其他人创建）：

enter image description here

现在我必须进行一些验证：

如果用户的城市和用户的状态与db的值匹配，则成本将为30

如果用户的州匹配但不匹配城市，则费用为50 否则费用将是100

我写这段代码：

if (ClientList.size() > 0) {
    for (int i = 0; i < ClientList.size(); i++) {
        final ParseObject p = ClientList.get(i);
        String state = p.getString("State");
        String city = p.getString("City");
        float cost = Float.parseFloat(p.getString("CostInPrecentage"));
        if(stateDeli.equalsIgnoreCase(state) && cityDeli.equalsIgnoreCase(city)) {
            shippingCost = cost;
        } else if(stateDeli.equalsIgnoreCase(state) && !cityDeli.equalsIgnoreCase(city)) {
            shippingCost = cost;
        } else {
            shippingCost = cost;
        }
    }
}

这总是让我退货运费= 100

我试图改变if else

if(stateDeli.equalsIgnoreCase(state)) {
    if(cityDeli.equalsIgnoreCase(city)) {
        shippingCost = cost;
    } else {
        shippingCost = cost;
    }
} else {
    shippingCost = cost;
}

这也会让我退回运费= 100

如果我像这样做：

if(stateDeli.equalsIgnoreCase(state) && cityDeli.equalsIgnoreCase(city)) {
    shippingCost = cost;
    break;
} else if(stateDeli.equalsIgnoreCase(state) && !cityDeli.equalsIgnoreCase(city)) {
    shippingCost = cost;
    break;
} else {
    shippingCost = cost;
}

它适用于默认和状态，但不适用于匹配州和城市的情况。

除了这些，我尝试了许多条件与休息似乎没有什么工作完美。你能否建议如何验证这一点。

最后我管理了这样的条件：

 if (stateDeli.equalsIgnoreCase(state)&&cityDeli.equalsIgnoreCase(city)) {
                                      shippingCost = cost;
                                      break;
                                      }
                                      else if (stateDeli.equalsIgnoreCase(state) && ((city == null || city =="" || "Default".equalsIgnoreCase(city)))) {

                                     shippingCost = cost;   
                                     break;
                                      }
                                       else if("Default".equalsIgnoreCase(city) && "Default".equalsIgnoreCase(state)){

                                         shippingCost = cost; 
                                         break;
                                      }

Answer 1

如果您的运费最低，那么您需要确保更高的运费不会超过更低的运费。

if (ClientList.size() > 0) {
  for (int i = 0; i < ClientList.size(); i++) {
    final   ParseObject p = ClientList.get(i);
    String state = p.getString("State");
    String city = p.getString("City");
    float cost = Float.parseFloat(p.getString("CostInPrecentage"));

    //if (cost < shippingCost) { // There could be an improvement, otherwise don't try!
      if (stateDeli.equalsIgnoreCase(state) && cityDeli.equalsIgnoreCase(city)) {
        shippingCost = cost;
        break;
      }
      else if (stateDeli.equalsIgnoreCase(state) && !cityDeli.equalsIgnoreCase(city)) {
        shippingCost = cost;
        break;
      }
      else if (!stateDeli.equalsIgnoreCase(state) && !cityDeli.equalsIgnoreCase(city)) {
        shippingCost = cost;
        break;
      }
    //}
  }
}

编辑：答案已更新为使用中断。

if if inside for循环android

1 个答案: