org.json.JSONException: Value [{"id":"98747406","name":"adam","surname":"hfdd","age":"2","latitude":"54.2118","longitude":"16.1876","origin":"koszalin","destination":"sian\u00f3w","ride_id":"262243421","date":"2017-05-25 18:13:00"}] at jaPassengers of type java.lang.String cannot be converted to JSONArray
Have anyone idea what cause this error? It occur when I try getJSONArray from server output e.g.:
output:
{"iActualJoinRequests":"4","jaPassengers":"[{\"id\":\"98747406\",\"name\":\"adam\",\"surname\":\"hfdd\",\"age\":\"2\",\"latitude\":\"54.2113448\",\"longitude\":\"16.1876282\",\"origin\":\"koszalin\",\"destination\":\"sian\u00f3w\",\"ride_id\":\"262243421\",\"date\":\"2017-05-25
18:13:00\"}]"}
JSONObject joOutput = new JSONObject(output);
JSONArray jaPassengers = joOutput.getJSONArray("jaPassengers");
EDIT: Problem solved, solution in comment.
If you used a json parser, the error would become pretty clear:
"jaPassengers" : "[{\"id\":\"98747406\",\"name\":\"adam\",\"surname\":\"hfdd\",\"age\":\"2\",\"latitude\":\"54.2113448\",\"longitude\":\"16.1876282\",\"origin\":\"koszalin\",\"destination\":\"sian\u00f3w\",\"ride_id\":\"262243421\",\"date\":\"2017-05-25 18:13:00\"}]"
Your array is actually encoded as a string.
To parse this, first fetch it as a string, then parse the resulting string as a JSONArray:
JSONObject joOutput = new JSONObject(output);
String makeShiftArray = joOutput.getString("jaPassengers");
JSONArray jaPassengers = new JSONArray(makeShiftArray);
It would be better to fix this on the server side if possible
Matt Clark, like you advised I'm trying to fix problem on server side. Code:
$aOutput = array('iActualJoinRequests' => $iActualJoinRequests, 'jaPassengers' => $aPassengers);
$joOutput = json_encode($aOutput, JSON_FORCE_OBJECT);
echo $joOutput;
cause error in java when I try to get JSONArray jaPassengers, but:
$aOutput = array('iActualJoinRequests' => $iActualJoinRequests, 'jaPassengers' => '');
$joOutput = json_encode($aOutput, JSON_FORCE_OBJECT);
$joOutput = json_decode($joOutput);
$joOutput -> jaPassengers = $aPassengers;
$joOutput = json_encode($joOutput);
echo $joOutput;
works :)
Problem solved.
I seem to be getting an incomplete JSON object from my PHP web service. My PHP codes are as follows:
<?php
define('IEM_PATH', '../admin/com');
require_once('../admin/includes/config.php');
require_once('../admin/com/lib/IEM.class.php');
require_once ('../admin/com/lib/IEM/DBFACTORY.class.php');
require_once ('../admin/com/lib/IEM/baseAPI.class.php');
require_once ('../admin/com/lib/API/USERS.class.php');
require_once ('../admin/com/lib/IEM/baseRecord.class.php');
require_once ('../admin/com/lib/record/Users.class.php');
function GetLists($userid = 0, $getUnconfirmedCount = false) {
$userid = $_REQUEST['userID'];
if (!$userid) {
trigger_error('User object has no user id as parameter.', E_USER_NOTICE);
return false;
}
if (!$userid) {
$userid = $this->userid;
}
require_once('../admin/functions/api/lists.php');
$listapi = new Lists_API();
$returnA = $listapi->GetListByUserID($userid, $getUnconfirmedCount);
$returnResult1 = array();
foreach ($returnA as $key => $value) {
//$lists[] = $key;
$returnResult["contactList"][] = array("listID" => $returnA[$key]['listid'], "name" => $returnA[$key]['name']);
}
$returnResult["success"] = 1;
echo json_encode($returnResult);
}
GetLists();
However when I try to retrieve the results my logcat only shows:
E/JSON Parser: Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
W/System.err: org.json.JSONException: No value for success
By doing a logging, my android returns my JSON object as follows
D/Returned JSON: {"androidid":"1"}
from these codes
// getting JSON response from PHP web service
JSONObject returnedJSONObj = listsJSONParser.makeHttpRequest(Constant.URL
+ "RetrieveList.php", "GET", params);
Log.d("Returned JSON ", String.valueOf(returnedJSONObj));
success = returnedJSONObj.getInt("success");
I don't understand why there is no value for success when my PHP does return a JSON Array as well as the success value according to the code, but the android studio java codes does not detect these values in the JSON object. What am I doing wrong here?
you should modify your android code
success = returnedJSONObj.getInt("success");
to
success = returnedJSONObj.getInt("androidid");
The problem is that there is a problem with your php file, so instead of returning a JSON object, it returns a string with the error.
You need to make sure you are sending the correct POST or GET values to the URL if you are or you check for database errors. try logging the inputstream coming from the php server to see the full error it is sending
Im not sure whats the error behind this, but im getting an error saying
org.json.JSONException: No value for
http://starstrakph.s3.amazonaws.com/12/avatars/1386757806.jpg
My JSON are as follows
{"id":"12","display_name":"Anne","screen_name":"Anne Curtis","avatar":"http:\/\/starstrakph.s3.amazonaws.com\/12\/avatars\/1386757806.jpg","avatar_source":"http:\/\/www.balita.com\/filipino-superstar-anne-curtis-katulong-ng-pechanga-resort-casino-sa-pagdiriwang-ng-araw-ng-kasarinlan-ng-pilipinas\/"}
And my codes are:
JSONObject userObj = new JSONObject(result);
cFeeds.SetPostScreenName(userObj.getString("screen_name"));
String avatar = userObj.getString(userObj.optString("avatar"));
cFeeds.SetAvatar(avatar);
Should I use JSON array for this? is there any wrong on my code or am i missing something?
Thanks in advance
The problem is that you are using the value of the json object (which is a json String) named avatar as the name of another json object which obviously doesn't exist.
String avatar = userObj.getString(userObj.optString("avatar"));
It seems you just want the value of avatar, so just get it
String avatar = userObj.optString("avatar");
Im trying to do the following:
UserFunctions uf = new UserFunctions();
JSONArray json = uf.getAllFreebies();
System.out.println(json + "blah1"); //Here im able to retrieve the whole JSONArray.
try{
System.out.println("1");
for (int i = 1; i <json.length(); i++) {
System.out.println("2");
jo = json.optJSONObject(i); //Im getting null value here
System.out.println(jo + "blah2"); //Here im getting null
...}
Im printing out my JSONArray using following lines.
JSONArray json = uf.getAllFreebies();
System.out.println(json + "blah1");
Now on the following lines when i tried to retrieve the JSONObject from the JSONArray and tried to print it out,it prints out "null" instead of the JSONObject at the particular index.
jo = json.optJSONObject(i);
System.out.println(jo + "blah2");
Can anyone pls tell me what am i doing wrong?I mean how can i get a null for JSONOBject when my JSONArray is not null?
Thank You.
Following is my JSONArray logcat:
05-31 21:02:57.156: I/System.out(318): [["viking","Art","Potrait","Potrait","Good","im giving out potrait 7325697","176 Fiat Ave","Iselin","New Jersey","USA","08830","2012-05-27"],["n00b","Books","Novels","Novels","Good","Im giving out novels 7325697","b9 maa krupa","petlad","Gujarat","India","388450","2012-05-27"],["n00b","Computers","laptop","laptop giveaway","Good","Im giving out laptop if you are interested than pls call on 7325697","B9 Ma Krupa","Petlad","Gujarat","India","388450","2012-05-27"],["mista","Cameras & Photos","Camera","Camera GiveAway","Very good","im giving out camera .its kodak .pls email me on mista#gmail.com","Mista Lee elm street","seoul","Korea","South Korea","ha8 9sd","2012-05-27"],["panda","Gaming Consoles","XBOX","XBOX 360","Very Good","Im giving out xbox 360.if you are interested please email me on panda#gmail.com","435 Carmen Rd,","Buffalo","New York","USA","14226","2012-05-27"],["viking","Cameras & Photos","Camera","Kodak Camera","Good","Kodak Camera giveaway.Pls call on 732397","","Iselin","New Jersey","USA","08830","2012-05-28"],["viking","Books","Novels","Novel GA","Good","Novel give away.call on 7325697.","","Iselin","New Jersey","USA","08830","2012-05-28"],["viking","Automotive","Car","Car GiveAway","Good","Im giving out car.if you are interested pls call 7323697.","176 Fiat Ave","Iselin","New Jersey","USA","08830","2012-05-29"],["viking","Collectibles","Medallions","Medallion GA","Very Good","Im giving out medallion.if inetrested pls call 732697","176 Fiat Ave,","Iselin","New Jersey","USA","08830","2012-05-29"],["viking","Clothing & Accessories","cloths","cloths giveaway","Good","im giving out cloths if you are interested pls call on 735697","176 Fiat Ave,","Iselin","New jersey","USA","08830","2012-05-29"],["viking","Books","Novel","Novel GA","Good","pls call 735697","435 carmen rd","buffalo","ny","usa","14226","2012-05-29"],["viking","Books","TextBook","CHemistry 101","GOod","pls call 735697","176 fiat ave","iselin","new jersey","usa","08830","2012-05-29"],["mista","Books","Notebook","Notbook","Good","im giving out notebbok if you are interested pls call 48374288423","elm street","seaoul","na","South Korea","jfjafjk","2012-05-29"]]blah1
logcat output when trying to print out JSONOBject at index i
05-31 21:02:57.156: I/System.out(318): nullblah2
The JSON [[...], [...], [...]] does not contain JSON-objects, but it does have some JSON-arrays.
Thus optJSONObject finds a JSON-array (where it expected a JSON-object) and returns null because it is of the incorrect type. (opt is short for optional.)
Use optJSONArray (note Array and not Object). Alternatively, use getJSONArray, which will throw a JSONException on failure.
Happy coding.
Note that JSON keeps a strict distinction between Objects, Arrays, and the various Values. The concept of an Array being a special (sub)kind of Object (in the JSON sense) exists in JavaScript but does not necessarily extend to other JSON implementations. For instance, the JSONArray class has no relationship with the JSONObject class.