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android how to convert json array to string array

Posted by: admin June 15, 2020 Leave a comment

Questions:

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

How to&Answers:

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();
    }
}

Answer:

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()); 
} 

Answer:

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();
    }
}

Answer:

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.

Answer:

Another elegant kotlin way:

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

And just convert to array if needed