How do I remove a specific element from a JSONArray

Question

I am building one app in which I request a PHP file from server  This PHP file returns a JSONArray having JSONObjects as its elements e g                        uniqid   h5Wtd         name   Test 1         address   tst         email   ru tst tst cc         mobile   12345        city   ind                                   my code      jArrayFavFans is the JSONArray i build from string i get from response     its giving me correct JSONArray    JSONArray jArrayFavFans new JSONArray serverRespons   for  int j   0  j  lt  jArrayFavFans length    j        try       if  jArrayFavFans getJSONObject j  getString  uniqid   equals id fav remov             jArrayFavFans getJSONObject j  remove j       I try this to remove element at the current index    But remove doesn t work here                int index jArrayFavFans getInt j         Toast makeText getParent     Object to remove        id fav remov  Toast LENGTH SHORT  show              catch  JSONException e           TODO Auto-generated catch block     e printStackTrace            How do I remove a specific element from this JSONArray

User · Answer

In my case I wanted to remove jsonobject with status as non zero value  so what I did is made a function  removeJsonObject  which takes old json and gives required json and called that function inside the constuctor   public CommonAdapter Context context  JSONObject json  String type            this context context          this json  removeJsonObject json           this type type          Log d  CA     type   type           public JSONObject removeJsonObject JSONObject jo           JSONArray ja  null          JSONArray jsonArray  new JSONArray            JSONObject jsonObject1 new JSONObject             try               ja   jo getJSONArray  data               catch  JSONException e                e printStackTrace                      for int i 0  i lt ja length    i                 try                    if Integer parseInt ja getJSONObject i  getString  status     0                                        jsonArray put ja getJSONObject i                        Log d  jsonarray    jsonArray toString                                       catch  JSONException e                    e printStackTrace                                    try               jsonObject1 put  data  jsonArray               Log d  jsonobject1    jsonObject1 toString                  return jsonObject1            catch  JSONException e                e printStackTrace                      return json

User · Answer

You can use reflection    A Chinese website provides a relevant solution  http   blog csdn net peihang1354092549 article details 41957369 If you don t understand Chinese  please try to read it with the translation software     He provides this code for the old version     public void JSONArray remove int index  JSONArray JSONArrayObject  throws Exception      if index  lt  0          return      Field valuesField JSONArray class getDeclaredField  values        valuesField setAccessible true       List lt Object gt  values  List lt Object gt  valuesField get JSONArrayObject       if index  gt   values size            return      values remove index

User · Answer

We can use iterator to filter out the array entries instead of creating a new  Array     public static void removeNullsFrom JSONArray array  throws JSONException                   if  array    null                        Iterator lt Object gt  iterator   array iterator                        while  iterator hasNext                              Object o   iterator next                            if  o    null    o    JSONObject NULL                                iterator remove

User · Answer

Try this code  ArrayList lt String gt  list   new ArrayList lt String gt          JSONArray jsonArray    JSONArray jsonObject   int len   jsonArray length    if  jsonArray    null        for  int i 0 i lt len i          list add jsonArray get i  toString               Remove the element from arraylist list remove position     Recreate JSON Array JSONArray jsArray   new JSONArray list     Edit   Using ArrayList will add     to the key and values  So  use JSONArray itself  JSONArray list   new JSONArray         JSONArray jsonArray   new JSONArray jsonstring    int len   jsonArray length    if  jsonArray    null        for  int i 0 i lt len i                   Excluding the item at position         if  i    position                         list put jsonArray get i

User · Answer

public static JSONArray RemoveJSONArray  JSONArray jarray int pos     JSONArray Njarray new JSONArray    try  for int i 0 i lt jarray length   i              if i  pos          Njarray put jarray get i            catch  Exception e  e printStackTrace     return Njarray

User · Answer

In case if someone returns with the same question for Android platform  you cannot use the inbuilt remove   method if you are targeting for Android API-18 or less  The remove   method is added on API level 19  Thus  the best possible thing to do is to extend the JSONArray to create a compatible override for the remove   method   public class MJSONArray extends JSONArray         Override     public Object remove int index             JSONArray output   new JSONArray                 int len   this length             for  int i   0  i  lt  len  i                    if  i    index                    try                       output put this get i                      catch  JSONException e                        throw new RuntimeException e                                                      return output            return this  If you need the input array in case of a failed attempt to remove an item             EDIT As Daniel pointed out  handling an error silently is bad style  Code improved

User · Answer

JSONArray jArray   new JSONArray         jArray remove position      For remove JSONArrayElement   Note  - If remove   isn t there in JSONArray then     API 19 from Android  4 4  actually allows this method   Call requires API level 19  current min is 16   org json JSONArray remove  Right Click on Project Go to Properties  Select Android from left site option  And select Project Build Target greater then API 19   Hope it helps you

User · Answer

i guess you are using Me version  i suggest to add this block of function manually  in your code  JSONArray java     public Object remove int index        Object o   this opt index       this myArrayList removeElementAt index       return o      In java version they use ArrayList  in ME Version they use Vector

User · Answer

To Remove some element from Listview in android then it will remove your specific element and Bind it to listview   BookinhHistory adapter this productPojoList remove position    BookinhHistory adapter this notifyDataSetChanged

[java] How do I remove a specific element from a JSONArray?

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