<!--To read contact-->
 <uses-permission android:name="android.permission.READ_CONTACTS"/>
/**
     * To get the user contact information (Mobile)
     *
     * @return JSONObject contact information
     */
    public JSONObject readContact() {
        try {
            JSONObject contactList = new JSONObject();
            ContentResolver contentResolver = mContext.getContentResolver();

            String[] PHONE_PROJECTION = new String[]{
                    ContactsContract.RawContacts._ID,
                    ContactsContract.Contacts.DISPLAY_NAME,
                    ContactsContract.CommonDataKinds.Phone.NUMBER,
            };

            Cursor people = contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, PHONE_PROJECTION, null, null, null);
            if (people != null) {
//            Log.e("size ", "" + people.getCount());
                while (people.moveToNext()) {
                    String contactName = people.getString(1);
                    String phoneNumber = people.getString(2);

                    contactName=contactName.replace(".","u22C5");
                    contactName=contactName.replace(",","u002C");
                    contactName=contactName.replace(":","u003B");
                    contactName=contactName.replace("$","s");
                    contactName=contactName.replace("@","a");

                    phoneNumber=phoneNumber.replace(".","u22C5");
                    phoneNumber=phoneNumber.replace(",","u002C");
                    phoneNumber=phoneNumber.replace(":","u003B");
                    if (phoneNumber != null)
                        contactList.put(contactName, phoneNumber);
                }
                people.close();
            }
            return contactList;
        }catch (Exception e){
            //Exception
        }
        return null;
    }