Question

我有以下Android java代码：

String json = "{\"Name_1\":1,\"Name_2\":0,\"Name_3\":0}";
JSONObject object = new JSONObject(json);
String[] propertyNames = JSONObject.getNames(object);
values = new String[propertyNames.length];
for (int i = 0; i < propertyNames.length; i++) {
  values[i] = String.valueOf(object.get(propertyNames[i]));
}

但是我收到以下错误：方法getNames(JSONObject)未定义类型JSONObject。我该怎么做才能获得propertyNames？

Answer 1

为什么不看JavaDoc？它会告诉您keys()方法。

for (Iterator<String> it = object.keys(); it.hasNext(); ) {
    String key = it.next();
    // ...
}

编辑：获取一系列键：

List<String> keyList = new ArrayList<String>();
for (Iterator<String> it = object.keys(); it.hasNext(); ) {
    String key = it.next();
    keyList.add(key);
}

String[] keyArray = keyList.toArray(new String[keyList.size()]);

如何在Android中使用JSONObject

1 个答案: