问题

import org.json.JSONArray;
import org.json.JSONObject;

public class RainChecker {

    public static void main(String[] args) {
        String jsonString = "{\n" +
                "    \"daily\": [\n" +
                "        {\n" +
                "            \"dt\": 1597730400,\n" +
                "            \"sunrise\": 1597705822,\n" +
                "            \"sunset\": 1597758442,\n" +
                "            \"temp\": {\n" +
                "                \"day\": 299.15,\n" +
                "                \"min\": 288.84,\n" +
                "                \"max\": 299.15,\n" +
                "                \"night\": 288.84,\n" +
                "                \"eve\": 298.91,\n" +
                "                \"morn\": 299.15\n" +
                "            },\n" +
                "            \"feels_like\": {\n" +
                "                \"day\": 291.47,\n" +
                "                \"night\": 287.34,\n" +
                "                \"eve\": 293.53,\n" +
                "                \"morn\": 291.47\n" +
                "            },\n" +
                "            \"pressure\": 997,\n" +
                "            \"humidity\": 27,\n" +
                "            \"dew_point\": 278.72,\n" +
                "            \"wind_speed\": 9.52,\n" +
                "            \"wind_deg\": 200,\n" +
                "            \"weather\": [\n" +
                "                {\n" +
                "                    \"id\": 500,\n" +
                "                    \"main\": \"Rain\",\n" +
                "                    \"description\": \"light rain\",\n" +
                "                    \"icon\": \"10d\"\n" +
                "                }\n" +
                "            ],\n" +
                "            \"clouds\": 100,\n" +
                "            \"pop\": 0.86,\n" +
                "            \"rain\": 1.03,\n" +
                "            \"uvi\": 4.86\n" +
                "        }\n" +
                "    ]\n" +
                "}";

        JSONObject jsonObject = new JSONObject(jsonString);
        JSONArray dailyArray = jsonObject.getJSONArray("daily");
        JSONObject firstObject = dailyArray.getJSONObject(0);
        double rainValue = firstObject.getDouble("rain");

        if (rainValue == 1.0) {
            System.out.println("The first object has a rain value of 1.0.");
            // Perform your analysis here
        } else {
            System.out.println("The first object does not have a rain value of 1.0.");
        }
    }
}

 "daily": [
{
"dt": 1597730400,
"sunrise": 1597705822,
"sunset": 1597758442,
"temp": {
"day": 299.15,
"min": 288.84,
"max": 299.15,
"night": 288.84,
"eve": 298.91,
"morn": 299.15
},
"feels_like": {
"day": 291.47,
"night": 287.34,
"eve": 293.53,
"morn": 291.47
},
"pressure": 997,
"humidity": 27,
"dew_point": 278.72,
"wind_speed": 9.52,
"wind_deg": 200,
"weather": [
{
"id": 500,
"main": "Rain",
"description": "light rain",
"icon": "10d"
}
],
"clouds": 100,
"pop": 0.86,
"rain": 1.03,
"uvi": 4.86
}

答案1

得分: 1

你想检查响应中是否返回了 "rain" 属性。

要实现这个目标，请按照以下步骤进行操作：

1. 为JSON数组中的对象创建一个类。
2. 在Android中使用Gson或任何其他JSON库，将获取到的JSON转换为创建的类对象。
3. 然后检查rain是否不为null，并且rain不等于0，以确认JSON数组中的对象中存在rain属性。

答案2

得分: 1

String yourJSONString; // 应该保存你拥有的JSON数据
JSONArray c = JSONArray(yourJSONString);
for (int i = 0 ; i < c.length(); i++) {
    JSONObject obj = c.getJSONObject(i);
    if(obj.has("rain")){
        // 对象具有"rain"属性
    }
    else{
        // 对象不具有"rain"属性
    }
}

String yourJSONString; //should hold the JSON you have 
JSONArray c = JSONArray(yourJSONString);
for (int i = 0 ; i < c.length(); i++) {
JSONObject obj = c.getJSONObject(i);
if(obj.has("rain")){
//object has "rain" property
}
else{
//object doesnt have "rain" property
}
}