在android中获取json数组键
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Get json array keys in android
提问by user782104
{
"204": {
"host": "https:\/\/abc.com\/production-source\/ChangSha\/2013\/12\/02\/0\/0\/A\/Content\/",
"timestamp": 1385909880,
"cover": ["17\/Pg017.png",
"18\/Pg018.png",
"1\/Pg001.png",
"2\/Pg002.png"],
"year": "2013",
"month": "12",
"day": "02",
"issue": "2013-12-02",
"id": "204"
},
"203": {
"host": "https:\/\/abc.com\/production-source\/ChangSha\/2013\/12\/01\/0\/0\/A\/Content\/",
"timestamp": 1385806902,
"cover": ["1\/Pg001.png",
"2\/Pg002.png",
"3\/Pg003.png",
"4\/Pg004.png"],
"year": "2013",
"month": "12",
"day": "01",
"issue": "2013-12-01",
"id": "203"
},
"202": {
"host": "https:\/\/abc.com\/production-source\/ChangSha\/2013\/11\/30\/0\/0\/A\/Content\/",
"timestamp": 1385720451,
"cover": ["1\/Pg001.png",
"2\/Pg002.png",
"3\/Pg003.png",
"4\/Pg004.png"],
"year": "2013",
"month": "11",
"day": "30",
"issue": "2013-11-30",
"id": "202"
}
}
The above sample json array , how to get the 204, 203 and 202? Thanks
上面的示例json数组，如何得到204、203和202？谢谢
I tried:
我试过：
JSONArray issueArray = new JSONArray(jsonContent);
for (int j = 0; j < issueArray.length(); j++) {
JSONObject issue = issueArray.getJSONObject(j);
String _pubKey = issue.getString(0);
}
回答by ρяσ?ρ?я K
above sample json array , how to get the 204, 203 and 202?
上面的示例 json 数组，如何获得 204、203 和 202？
No, current String is JSONObjectinstead of JSONArray. you should get Iterator using JSONObject. keys ()if inner JSONObject keys dynamic as:
不，当前 StringJSONObject不是JSONArray. 您应该使用JSONObject获取迭代器。keys ()如果内部 JSONObject 键动态为：
JSONObject issueObj = new JSONObject(jsonContent);
Iterator iterator = issueObj.keys();
while(iterator.hasNext()){
String key = (String)iterator.next();
JSONObject issue = issueObj.getJSONObject(key);
// get id from issue
String _pubKey = issue.optString("id");
}
回答by Amandeep Rohila
Answer given by Mr. K is also right but you can also use jsonObject names()method. please find the sample code
K 先生给出的答案也是正确的，但您也可以使用jsonObject names()方法。请找到示例代码
for(int i = 0; i<jsonobject.length(); i++){
Log.e(TAG, "Key = " + jsonobject.names().getString(i) + " value = " + jsonobject.get(jsonobject.names().getString(i)));
}
I hope dis will help you
希望dis能帮到你
回答by Biraj Zalavadia
User this method to iterate json dynamically
使用此方法动态迭代json
private void parseJson(JSONObject data) {
if (data != null) {
Iterator<String> it = data.keys();
while (it.hasNext()) {
String key = it.next();
try {
if (data.get(key) instanceof JSONArray) {
JSONArray arry = data.getJSONArray(key);
int size = arry.length();
for (int i = 0; i < size; i++) {
parseJson(arry.getJSONObject(i));
}
} else if (data.get(key) instanceof JSONObject) {
parseJson(data.getJSONObject(key));
} else {
System.out.println("" + key + " : " + data.optString(key));
}
} catch (Throwable e) {
System.out.println("" + key + " : " + data.optString(key));
e.printStackTrace();
}
}
}
}
回答by Nongthonbam Tonthoi
You can also use names()as below to get the keys as JSONArray:
您还可以使用names()以下方法获取密钥JSONArray：
JSONArray jArray = jsonObject.names();
int len = jsonObject.length();
for (int i=0; i<len; i++) {
String keyName = (String)jArray.get(i);
JSONObject jValue = jsonObject.getJSONObject(keyName);
String _pubKey = jValue.optString("id");
//get the other values from jValue
}
回答by Jitesh Dalsaniya
Here you are trying to get JSONArraybut in json response it is JSONObject.
在这里，您正在尝试获取，JSONArray但在 json 响应中它是JSONObject.
Use following code.
使用以下代码。
JSONObject issueObject = new JSONObject(jsonContent);
String _pubKey = issueObject.getString(0);
