SoundPool的使用以及登录密码

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conn.setRequestProperty("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");?
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");?
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conn.setRequestMethod("POST");?
conn.setDoOutput(true);?
conn.setDoInput(true);?
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DataOutputStream out = new DataOutputStream(conn.getOutputStream());?
out.writeBytes(String.format("check_username=%s&password=%s",?
? ? ? ? URLEncoder.encode(PERSNR, "UTF-8"),?
? ? ? ? URLEncoder.encode(PASSWD, "UTF-8")));?
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out.close();?
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// I have absolutely no idea why this is needed.?
InputStream is = conn.getInputStream();?
// ... read the response from is.?
is.close();?