MainActivity.java 文件源码

/**
 * Fetches an entry value from the HttpResponseCache cache
 * @param connection connection from which we need the cache
 * @param uri uri to use to get the cache entry
 * @return cache entry value as String
 */
private String fetchFromHTTPUrlConnectionCache(HttpURLConnection connection, URI uri) {

    try {
        HttpResponseCache responseCache = HttpResponseCache.getInstalled();
        if(responseCache != null){
            CacheResponse cacheResponse = responseCache.get(uri, "GET", connection.getRequestProperties());
            Scanner scanner = new Scanner(cacheResponse.getBody(), "UTF-8");
            StringBuilder sb = new StringBuilder();
            while (scanner.hasNextLine()){
                sb.append(scanner.nextLine());
            }

            return sb.toString();
        }

    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;

}