Android Exoplayer - Set referer header

DefaultHttpDataSourceFactory dataIntance = new DefaultHttpDataSourceFactory(
                        Util.getUserAgent(context, getPackageName()),
                        EXO_CONNECT_TIME,
                        EXO_CONNECT_TIME,
                        true);

Map<String, String> headers = new HashMap<>();
headers.put("Referer", REFERER_URL_HERE);

dataIntance.getDefaultRequestProperties().set(headers);
CacheDataSourceFactory dataSourceFactory = new CacheDataSourceFactory(
                        ExoPlayerCache.getInstance(context), dataIntance, CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR);