Update elements in a JSONObject

Question

Lets say I gave a JSONObject      person    name   Sam    surname   ngonma      car    make   toyota    model   yaris        How do I update some of the values in the JSONObject    Like below    String name   jsonArray getJSONObject 0  getJSONObject  person   getString  name    name    Sammie

User · Answer

Generic way to update the any JSONObjet with new values   private static void updateJsonValues JsonObject jsonObj        for  Map Entry lt String  JsonElement gt  entry   jsonObj entrySet              JsonElement element   entry getValue            if  element isJsonArray                  parseJsonArray element getAsJsonArray               else if  element isJsonObject                  updateJsonValues element getAsJsonObject               else if  element isJsonPrimitive                  jsonObj addProperty entry getKey      lt provide new value gt                         private static void parseJsonArray JsonArray asJsonArray        for  int index   0  index  lt  asJsonArray size    index              JsonElement element   asJsonArray get index           if  element isJsonArray                  parseJsonArray element getAsJsonArray               else if  element isJsonObject                  updateJsonValues element getAsJsonObject

User · Answer

Hello I can suggest you universal method  use recursion       public static JSONObject function JSONObject obj  String keyMain String valueMain  String newValue  throws Exception          We need to know keys of Jsonobject     JSONObject json   new JSONObject       Iterator iterator   obj keys        String key   null      while  iterator hasNext              key    String  iterator next               if object is just string we change value in key         if   obj optJSONArray key   null   amp  amp   obj optJSONObject key   null                 if   key equals keyMain    amp  amp   obj get key  toString   equals valueMain                         put new value                 obj put key  newValue                   return obj                                      if it s jsonobject         if  obj optJSONObject key     null                function obj getJSONObject key   keyMain  valueMain  newValue                         if it s jsonarray         if  obj optJSONArray key     null                JSONArray jArray   obj getJSONArray key               for  int i 0 i lt jArray length   i                          function jArray getJSONObject i   keyMain  valueMain  newValue                                     return obj      It should work  If you have questions  go ahead   I m ready

User · Answer

Use the put method  https   developer android com reference org json JSONObject html  JSONObject person    jsonArray getJSONObject 0  getJSONObject  person    person put  name    Sammie

User · Answer

Remove key and then add again the modified key  value pair as shown below        JSONObject js   new JSONObject        js put  name    rai         js remove  name        js put  name    abc      I haven t used your example  but conceptually its same

User · Answer

public static JSONObject updateJson JSONObject obj  String keyString  String newValue  throws Exception               JSONObject json   new JSONObject                   get the keys of json object             Iterator iterator   obj keys                String key   null              while  iterator hasNext                      key    String  iterator next                       if the key is a string  then update the value                 if   obj optJSONArray key     null   amp  amp   obj optJSONObject key     null                         if   key equals keyString                                 put new value                         obj put key  newValue                           return obj                                                              if it s jsonobject                 if  obj optJSONObject key     null                        updateJson obj getJSONObject key   keyString  newValue                                         if it s jsonarray                 if  obj optJSONArray key     null                        JSONArray jArray   obj getJSONArray key                       for  int i   0  i  lt  jArray length    i                              updateJson jArray getJSONObject i   keyString  newValue                                                                     return obj

[java] Update elements in a JSONObject

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