Convert JSONObject into String array

Question

I'm receiving a JSONObject like this

{"tag":"value1", "tag":"value2", .............}

How do I make it into a String array of

["value1", "value2"]

• Nambi: key is same for all the values

Answer 1

Create the Arraylist and get the string from the jsonobject and stored it in the arraylist.

Do like this

ArrayList tagarray=new ArrayList();
JSONObject jo=new JSONObject(jsonstring);
for(int i=0;i<jo.length();i++){
tagarray.add(jo.getString("tag"));
 }

• user3299978: Can you check the edit please. It's not actually (my mistake) "tag1", "tag2". It's all "tag", "tag".... How do I do it?

Answer 2

Try this way

JSONObject obj = new JSONObject("");
 Iterator<String> itr = obj.keys();
 int i=0;
 String[] values = new String[obj.length()];
 while(itr.hasNext()){
 values[i++] = obj.getString((String)itr.next());
 }

Answer 3

Use following code.

ArrayList array=new ArrayList();
JSONObject jo=new JSONObject(jsonstring);
for(int i=0;i<jo.length();i++){
 array.add(jo.getString("tag"));
}
String[] Arr = new String[array.size()];
 Arr = array.toArray(Arr);

Or you have another option.

 JSONObject jo=new JSONObject(jsonstring);
 String[] array = new String[jo.length()];
 for(int i=0;i<jo.length();i++){
 array[i] = jo.getString("tag");
 }

Answer 4

There is super cool , lib called GSON , which is really helpfull for converting all type of JSON into its object .

Answer 5

If tags are going to be tag1, tag2 and so on...you can use a for loop,

string[i] = jsonObj.getString("tag"+i); 

Or you can make a model class with datatype of String or ArrayList tag , eg.

class ModelClass{
ArrayList<String> tag; 
//getter setter here
}

And with that use Gson for JSON parsing and mapping the data,

Gson gson = new Gson();
modelClass= gson.fromJson(yourJson,ModelClass.class);

And your work is done. You have each value in the ArrayList tag.

This is more useful for parsing and mapping long and-or complex json strings.

https://code.google.com/p/google-gson/

For Naming discrepancies(according to the variables in webservice), can use annotations like @SerializedName. (So no need to use Serializable)

• user3299978: I put tag1, tag2 by mistake. Everything comes like "tag"
• Pararth: even better, then use a for each loop and your work is easy :)