Android HTTP 压缩 gzip

from stackoverflow

发送：

HttpUriRequest request = new HttpGet(url); 
request.addHeader("Accept-Encoding", "gzip"); 
// ... 
httpClient.execute(request); 
接收：
InputStream instream = response.getEntity().getContent(); 
Header contentEncoding = response.getFirstHeader("Content-Encoding"); 
if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) { 
    instream = new GZIPInputStream(instream); 
}