小编boi*_*ter的帖子

有人能为Android的Spanned Java界面中的标志提供清晰的解释吗？ 文档不清楚,我需要更多细节,就像在这个SO答案中解释其他标志一样.

请求以下标志的定义:

SPAN_COMPOSING
SPAN_INTERMEDIATE
SPAN_POINT_MARK_MASK
SPAN_PRIORITY
SPAN_USER
SPAN_USER_SHIFT

我想通过request.getContentLength()服务器客户端JSP页面获取内容大小。但是request.getContentLength（）总是返回-1，我不为什么？

Android程式码片段：

URL uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
//conn.setChunkedStreamingMode(100);
conn.setConnectTimeout(setTimeOut>0?setTimeOut:timeoutConnection);
conn.setReadTimeout(setTimeOut>0?setTimeOut:timeoutConnection);  
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "keep-alive");

//conn.setRequestProperty("content-length", "10");
//conn.addRequestProperty("content-length", "20");
conn.setFixedLengthStreamingMode(30);

conn.setRequestProperty("Charsert", ENCODING);
conn.setRequestProperty("Content-Type", "multipart/form-data"
                + ";boundary=" + java.util.UUID.randomUUID().toString());
conn.connect();