Develop Reference

Google Places detail "photos[]" jsonarray is always null

So I get place_id by storing it in a Hashmap with the "name" of the place as the key.
private HashMap<String, String> placeTitleId = new HashMap<>();
if (!place.isNull("place_id")) {
placeId = place.getString("place_id");
placeTitleId.put(name, placeId);
}
Later, I create the Places Detail search url:
private String createPlaceDetailsUrl(String placeId) {
StringBuilder stringBuilder = new StringBuilder("https://maps.googleapis.com/maps/api/place/details/json?");
stringBuilder.append("placeid=").append(placeId);
stringBuilder.append("&key=").append(GOOGLE_PLACES_API_KEY);
return stringBuilder.toString();
}
Finally, I parse the json response:
JSONObject data = new JSONObject(result);
if (data.getString("status").equalsIgnoreCase("OK")) {
JSONArray photoArray = data.getJSONArray("photos");
}
What I don't understand is why the "photos" json array has no value
Android Monitor: W/System.err: org.json.JSONException: No value for photos
The documentation says that the photos[] jsonarray should have up to 10 photos. However, the json output schema does not contain a photos[] object, which I find weird. Is there a problem with how I am obtaining place_id or parsing the response?
EDIT:
The "result" String is incredibly long, but I can provide a gist:
result {
"address components" : [
*bunch of stuff*
]
...
"geometry" : {
*bunch of stuff*
}
"icon"
"id"
"photos" : [
{
"height"
"html_attributions:
"photo_reference!!
}
{
...
"photo_reference!!
}
*bunch more of these*
]
}
EDIT:
Fix is getting json object "result
JSONObject jsonObject = new JSONObject(result);
JSONObject data = new JSONObject("result");
The data object has "pictures"

Try this.
JSONObject data = new JSONObject(result);
// add log here ,make sure you have photos in your result
Log.e("result", result + "");
if (data.getString("status").equalsIgnoreCase("OK")) {
// edited here
JSONArray photoArray = data.optJSONArray("photos");
}
Edit
if (data .has("photos")) {
Log.e("photos", "photos exists");
} else {
Log.e("photos", "photos not exists");
}
Use data .has("photos") in your code and judge it .
Note
Use
JSONObject data = new JSONObject(result);
if(data.has("TAG")){
// if has it in your data,do something
}
to determine whether this tag is present in the data

Get dynamically list of object using json.simple

Asking after searching and trying many examples .
I'm trying to dynamically get list of values from json in order to insert into array .
The json looks like :
{
"Test_name":"mft",
"parameters":[
{
"Remotehost":"vl-tlv-ctm-qa22",
"Ftptype":"sftp",
"file_name":"blabla.txt"
}
]
}
i'm using the following code :
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader("c:/temp/test.txt"));
JSONObject jsonObject = (JSONObject) obj;
String testname = (String) jsonObject.get("Test_name");
System.out.println(testname)
JSONArray msg = (JSONArray) jsonObject.get("parameters");
Iterator<JSONObject> iterator = msg.iterator();
while (iterator.hasNext()) {
JSONObject factObj = (JSONObject) iterator.next();
System.out.println(factObj);
the output is :
mft
{"Remotehost":"vl-tlv-ctm-qa22","file_name":"blabla.txt","Ftptype":"sftp"}
how do i break the pairs in the nested so i can use the as variables and not as single line ?
Thanks ,
Zohar

You can get the pairs as key-value pair from JSONObject as below:
while (iterator.hasNext()) {
JSONObject factObj = (JSONObject) iterator.next();
for (Object key : factObj.keySet()) {
System.out.println(key+":"+factObj.get(key));
}
}

Parse JSON string in Java without keys

I am new to parsing JSON in java. I have this JSON string:
[
{
"projectId":5,
"userName":"clinician",
"projectName":"r",
"projectSummary":"r",
"projectLanguage":"r",
"contactPersonName":"r",
"contactPersonCV":"r",
"contactPersonEmail":"r",
"contactPersonPhone":"r"
},
[
{
"consentFileId":2,
"projectId":5,
"consentDescription":"r",
"consentFileName":"test.pdf",
"servicePathToGetConsentPdf":null
},
{
"consentFileId":3,
"projectId":5,
"consentDescription":"rrr",
"consentFileName":"test.pdf",
"servicePathToGetConsentPdf":"localhost:8080/4c_viewFile?consentFileId=3"
}
],
[
{
"anonymized_patient_identifier":"r",
"projectId":5
},
{
"anonymized_patient_identifier":"2",
"projectId":5
},
{
"anonymized_patient_identifier":"5",
"projectId":5
}
]
]
I have managed to get values from simpler JSON strings but this one has multiple levels and also there is no key in each level. I tried with simple code like this:
Object obj = parser.parse(data);
JSONObject jsonObject = (JSONObject) obj;
resultJson = (String) jsonObject.get("projectId");
resultJson += "\n";
resultJson += (String) jsonObject.get("userName");
but I get the error [java.lang.ClassCastException: org.json.simple.JSONArray cannot be cast to org.json.simple.JSONObject] And also I don't understand how I will get the values in lower level without a key. I tried also to save it as a JSONArray but it didn't work.

your root of json is type of JSONArray,
the first object stored in the root array is an object, you can retrieve it by using index = 0 .
this is a hack to make your code work:
JSONArray jsonArray = JSONArray.fromObject(data);
JSONObject jsonObject=obj.getJSONObject(0);
resultJson = (String) jsonObject.get("projectId");
resultJson += "\n";
resultJson += (String) jsonObject.get("userName");
NOTE:
to convert a String to JSONArray, you can do :
JSONArray array = JSONArray.fromObject(data);

To improve on nafas answer, I would do this to see all the objects in the array:
Object obj = parser.parse(data);
JSONArray jsonArray = (JSONArray) obj;
for (int i = 0; i < jsonArray.size (); i++) {
JSONObject jsonObject=obj.getJSONObject(i);
resultJson = (String) jsonObject.get("projectId");
resultJson += "\n";
resultJson += (String) jsonObject.get("userName");
}

Android: How to get certain values from JSON

I have the following code in my main activity.
JSONObject jObj = new JSONObject(loadJSONFromAsset());
jObj.getJSONObject("body");
The contents of jObj looks like this:
{
"body" : {
"name" : {
"test" : "abc"
}
}
}
I can get the value of "body" by iterating "jObj.keys()", but how can I get the value of "name"?

Use this:
JSONObject jObj = new JSONObject(loadJSONFromAsset());
JSONObject objectName = jObj.getJSONObject("body").getJSONObject("name");
String test = objectName.getString("test"); //return abc

Try this..
JSONObject jObj = new JSONObject(loadJSONFromAsset());
JSONObject js = jObj.getJSONObject("body");
JSONObject jo = js.getJSONObject("name");
System.out.println("test value "+jo.getString("test");

Is JSON same with GSON?

I have tried to run following code
Gson gson = new Gson();
String json = gson.toJson(result);
JSONObject jsonResponse = new JSONObject();
jsonResponse.put("sEcho", echo);
jsonResponse.put("iTotalRecords", iTotalRecords);
jsonResponse.put("iTotalDisplayRecords", iFilteredTotalRecords);
jsonResponse.put("aaData", json);
jsonResponse.toString();
JSONArray data = new JSONArray();
for (Object obj : result) {
JSONArray row = new JSONArray();
User user = (User) obj;
row.put(user.getId()).put(user.getUserName()).put(user.isEnabled());
data.put(row);
}
JSONObject jsonResponse2 = new JSONObject();
jsonResponse2.put("sEcho", echo);
jsonResponse2.put("iTotalRecords", iTotalRecords);
jsonResponse2.put("iTotalDisplayRecords", iFilteredTotalRecords);
jsonResponse2.put("aaData", data);
jsonResponse2.toString();
The result from toString function for both jsonResponse are as follows:
{"iTotalDisplayRecords":11,"iTotalRecords":11,"aaData":"[{\"creationTime\":0,\"enabled\":true,\"id\":1,\"loginDuration\":0,\"online\":false,\"password\":\"asda\",\"userName\":\"abiieez\"}]","sEcho":"1"}
{"iTotalDisplayRecords":11,"iTotalRecords":11,"aaData":[[1,"abiieez",true]],"sEcho":"1"}
I would like to eliminate the " symbol before [ and after ] from the first json response just like the second one (I noticed that the " is added after the array being put to the jsonResponse object). How can I accomplish this ?

Since you first convert your "result" to a String, and then add it to aaData, it will end up quoted, like a String should. If all you'd like to do is to remove the quotes, you could do something like this in line 2:
String json = "##" + gson.toJson(result) + "##";
and this in line 8:
jsonResponse.toString().replace("\"##", "").replace("##\"","");
(of course you need to choose the "quote marker" ## such that it will never appear as actual string content in your data anywhere else)
But the cleaner solution (although probably slower) would likely be to convert your String to an actual JSONObject by changing line 2 to:
JSONObject json = new JSONObject(gson.toJson(result));