Question

I am trying to store data gotton from JSON to an normal string array. The problem is i cant seem to initialize the array size according to the number for JSON data.

For now i declare the array size my own:

String[] path= new String[5];

This is the JSON part:

class Loadpath extends AsyncTask {

    protected String doInBackground(String... args) {
        // Building Parameters
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        // getting JSON string from URL
        JSONObject json = jParser.makeHttpRequest(url_all_imageDB, "GET",params);

        try {
                JSONArray productObj = json.getJSONArray(TAG_IMAGEDB); // JSON Array

                // looping through All path
                for (int i = 0; i < productObj.length(); i++) {
                    JSONObject image = productObj.getJSONObject(i);
                                            path[i] = image.getString(TAG_PATH);
                }

            } else {
                displayPath.setText("No path");
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return null;
    }

So my goal is the array size is gotten from the JSON.length().. Any idea how I can achieve this?

Answer 1

initialize the mStrings[ ] array size according to the JSONArray length as:

        String[] mStrings;  //<< Declare array as
        mStrings = new String[productObj.length()];  //<<initialize here

        for (int i = 0; i < productObj.length(); i++) {
            JSONObject image = productObj.getJSONObject(i);
            mStrings[i] = image.getString(TAG_PATH);
         }

and it is good if you use ArrayList instead of String Array as for getting values from Jsonobject as:

        ArrayList<String> mStrings=new ArrayList<String>(;
        for (int i = 0; i < productObj.length(); i++) {
            JSONObject image = productObj.getJSONObject(i);

            mStrings.add(image.getString(TAG_PATH));
         }