ManageContacts

public class ManageContacts {

    public static JSONObject getContacts(){

        try {
            JSONObject contacts = new JSONObject();
            JSONArray list = new JSONArray();
            Cursor cur = MyApplication.getAppContext().getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                    new String[] { ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME, ContactsContract.CommonDataKinds.Phone.NUMBER},
                    null, null,  ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC");

            while (cur.moveToNext()) {
                JSONObject contact = new JSONObject();
                String name = cur.getString(cur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));// for  number
                String num = cur.getString(cur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));// for name

                contact.put("phoneNo", num);
                contact.put("name", name);
                list.put(contact);
            }
            contacts.put("contactsList", list);
            cur.close();
            return contacts;
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }
}