我正在尝试使用Volley for Android更新远程JSON值。问题在于下面的代码完全覆盖了整个JSON对象。
文件位于此处:https://api.myjson.com/bins/kubxi
原始JSON文件如下:
{
"females": [
{
"id": 1,
"name": "Name One",
"actions": [
{
"action_1": 1,
"action_2": 2,
"action_3": 3
}
]
},
{
"id": 2,
"name": "Name Two",
"actions": [
{
"action_1": 4,
"action_2": 5,
"action_3": 6
}
]
}
]
}
Java代码
private void sendRequest() {
RequestQueue queue = Volley.newRequestQueue(this);
final JSONObject jsonObject = new JSONObject();
String url ="https://api.myjson.com/bins/kubxi"; // Remote JSON file
try {
jsonObject.put("action_1", 123);
jsonObject.put("action_2", 456);
jsonObject.put("action_3", 789);
} catch (JSONException e) {
Log.d("Exception", e.toString());
}
JsonObjectRequest putRequest = new JsonObjectRequest(Request.Method.PUT, url, jsonObject,
new Response.Listener<JSONObject>()
{
@Override
public void onResponse(JSONObject response) {
Log.d("Response", response.toString());
}
},
new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
Log.d("Error.Response", error.toString());
}
}
)
{
@Override
public Map<String, String> getHeaders()
{
Map<String, String> headers = new HashMap<>();
headers.put("Accept", "application/json");
headers.put("Content-Type", "application/json");
return headers;
}
@Override
public byte[] getBody() {
try {
Log.i("JSON", jsonObject.toString());
return jsonObject.toString().getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
};
queue.add(putRequest);
}
使用此代码后,JSON文件如下所示:
{
"action_1": 123,
"action_2": 456,
"action_3": 789
}
我希望代码只将action_1,action_2和action_3的值从1、2、3更新为123、456、789。
在运行代码后,我希望JSON文件看起来像这样:
{
"females": [
{
"id": 1,
"name": "Name One",
"actions": [
{
"action_1": 123,
"action_2": 456,
"action_3": 789
}
]
},
{
"id": 2,
"name": "Name Two",
"actions": [
{
"action_1": 123,
"action_2": 456,
"action_3": 789
}
]
}
]
}
建议将不胜感激!
答案 0 :(得分:1)
要更新json文件中的特定值,您可以这样做:
首先将您的original
json放入String:
String jsonString ="{
"females": [
{
"id": 1,
"name": "Name One",
"actions": [
{
"action_1": 1,
"action_2": 2,
"action_3": 3
}
]
}
]
}";
下一步,在JsonObject
中传递此字符串:
JSONObject jObject = new JSONObject(jsonString);//passing string to jsonobject
JSONArray jsonArray = jObject.getJSONArray("females");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject object = jsonArray.getJSONObject(i);
JSONArray jsonObject= object.getJSONArray("actions"); //getting action
array
for (int j = 0; j < jsonObject.length(); j++) {
JSONObject object1 = jsonObject.getJSONObject(j);
object1.put("action_1", 123); //here you are putting value to action_1
object1.put("action_2", 456);
object1.put("action_3", 789);
}
}
,然后将此jsonObject
发送到您的服务器。