how to retrieve the list of contacts in android

Question

my purpose to retrieve the list of contacts (name, number) is recorded in a json object, to send via web service to the server

then I found the code to visit contact

Answer 1

here my code

public static Map getAddressBook(Context context)
{
    Map result = new HashMap();
    Cursor cursor = context.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
    while(cursor.moveToNext()) 
    {
        int phone_idx = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
        int name_idx = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
        String phone = cursor.getString(phone_idx);
        String name = cursor.getString(name_idx);
        result.put(name, phone);
    }
    cursor.close();

    return result;
}

and need