CODEWITHSUNDEEP
androidjson
Dep
Dep

Reputation: 183

How to check if json array has any value?

I am using the condition - 

if (!obj2.getString("patronCheckoutInfo").equals("null")) {

But it does not work for the case when array got the value.

Eg: Case1- when json got value for "patronCheckoutInfo":

{
"ErrorMessage": ""
"Message": "Operation completed successfully"
"Status": "OK"
"Results": {
"LookupPatronInfoResponse": {
"patronAddressInfo": null
"patronCheckoutHistoryInfo": null
"patronCheckoutInfo": [6]
0:  {
"author": "Cobb, Kevin."

Case 2 - when no value:

{
"ErrorMessage": ""
"Message": "Operation completed successfully"
"Status": "OK"
"Results": {
"LookupPatronInfoResponse": {
"patronAddressInfo": null
"patronCheckoutHistoryInfo": null
"patronCheckoutInfo": null
"patronCirculationInfo": null

Tried few tutorials but unable to figure out. Any suggestion is welcome. Thanks in advance.

Upvotes: 3

Views: 10187

Answers (6)

Andan H M
Andan H M

Reputation: 793

You can try like this:

JSONArray patronCheckoutInfo= obj2.optJSONArray("patronCheckoutInfo");
if(patronCheckoutInfo){
        for (int i = 0; i < invitations.length(); i++) {
              JSONObject patronCheckoutInfoObject= patronCheckoutInfo.getJSONObject(i);
        }
}

Upvotes: 0

Dep
Dep

Reputation: 183

Thanks all for the suggestion. Below worked for me:

if (obj2.getString("patronCheckoutInfo") != null)

Upvotes: 0

Deepak Goyal
Deepak Goyal

Reputation: 4907

Try with 

if (!obj2.getString("patronCheckoutInfo").equals("null"))

to

String patronCheckoutInfo = obj2.getString("patronCheckoutInfo");
if(!TextUtils.isEmpty(patronCheckoutInfo)){
  // string has value
}else{
  // string is empty
}

Upvotes: 0

Amy
Amy

Reputation: 4032

Try This:

if(obj2.has("patronCheckoutInfo")){
//write your code
}

Upvotes: 2

Swaminathan V
Swaminathan V

Reputation: 4781

Yes, you can check if the particular key present in the Json.

Its pretty simple..!! Try this.. 

boolean response = jsonobject.has("patronCheckoutInfo")

Hope this will help you, Happy coding

Upvotes: 2

toantran
toantran

Reputation: 1819

You can use support function isNull (http://developer.android.com/reference/org/json/JSONObject.html#isNull(java.lang.String))

So, re-write your code in this case:

if (!obj2.isNull("patronCheckoutInfo")) {
// do something 
}

Upvotes: 3

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