CODEWITHSUNDEEP
androidjson
Jyosna
Jyosna

Reputation: 4446

android how to convert json array to string array

I have an app where I fetch data from server(json) in the form of array & by using the index i used in my app, like below.

JSONObject topobj = new JSONObject(page);
JSONObject innerobj = topobj.getJSONObject("restarutant");
JSONArray phone = innerobj.getJSONArray("phone");
textViewPhone.setText("Phone: " + phone.get(0).toString() + " ,"
                    + phone.get(1).toString());

for small size array I can get like this. But when array contains 'n' no of elements and dynamically i have to use this, at that time it required to convert into String Array. Can anybody tell me how I convert the json array to String array ? Thank you

Upvotes: 9

Views: 50013

Answers (6)

UdaraWanasinghe
UdaraWanasinghe

Reputation: 2882

If you are using org.json package, Here is the kotlin way of converting json array to string array.

// get json array
val jsonArray = json.getJSONArray("field")
// convert to string array
val stringArray = Array(jsonArray.length()) { jsonArray.getString(it) }

Upvotes: 0

sandrstar
sandrstar

Reputation: 12643

Another elegant kotlin way:

val list = jsonArray.map { jsonElement -> jsonElement.toString() }

And just convert to array if needed

Upvotes: 0

Mladen Rakonjac
Mladen Rakonjac

Reputation: 9812

Assume that you already have JSONArray jsonArray:

String[] stringArray = new stringArray[jsonArray.length()];
for(int i = 0, count = jsonArray.length(); i< count; i++)
{
    try {
        String jsonString = jsonArray.getString(i);
        stringArray[i] = jsonString.toString();
    }
    catch (JSONException e) {
        e.printStackTrace();
    }
}

Upvotes: 6

Rishabh
Rishabh

Reputation: 3852

This I think is what you searching for 

ArrayList<String> list = new ArrayList<String>();     
JSONArray jsonArray = (JSONArray)jsonObject; 
if (jsonArray != null) { 
   for (int i=0;i<jsonArray.length();i++){ 
    list.add(jsonArray.get(i).toString()); 
}

Upvotes: 5

Asim Ihsan
Asim Ihsan

Reputation: 1501

I just did this yesterday! If you're willing to use a 3rd party library then you can use Google GSON, with the additional benefit of having more concise code.

String json = jsonArray.toString();
Type collectionType = new TypeToken<Collection<String>>(){}.getType();
Collection<String> strings = gson.fromJson(json, collectionType);

for (String element : strings)
{
    Log.d("TAG", "I'm doing stuff with: " + element);
}

You can find more examples in the user guide.

Upvotes: 3

Pasha
Pasha

Reputation: 2425

This should help you.

Edit:

Maybe this is what you need:

ArrayList<String> stringArray = new ArrayList<String>();
JSONArray jsonArray = new JSONArray();
for(int i = 0, count = jsonArray.length(); i< count; i++)
{
    try {
        JSONObject jsonObject = jsonArray.getJSONObject(i);
        stringArray.add(jsonObject.toString());
    }
    catch (JSONException e) {
        e.printStackTrace();
    }
}

Upvotes: 22

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