我是新来的Andr​​oid和试图获得一个网页的HTML内容，这是当我碰到这个问题。

I am new to Android and trying to get HTML content of a web page and that is when I came across this issue.

java.lang.IllegalStateException: Cannot set request property after connection is made

code：

public static String getHTMLPage(String inputURL, String host, String referer, String cookie, String breakString) {

    String htmlContent = "";
    try {
        URL u = new URL(inputURL);
        HttpURLConnection uc = (HttpURLConnection) u.openConnection();
        uc.setRequestProperty("Host", host);
        uc.setRequestProperty("Connection", "keep-alive");
        if (!referer.isEmpty()) {
            uc.setRequestProperty("Referer", referer);
        }
        uc.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/13.0.782.112 Safari/535.1");
        uc.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        uc.setRequestProperty("Accept-Encoding", "html");
        uc.setRequestProperty("Accept-Language", "en-US,en;q=0.8");
        uc.setRequestProperty("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3");

        if (!cookie.isEmpty()) {
            uc.setRequestProperty("Cookie", cookie);
        }

        BufferedReader br = new BufferedReader(new InputStreamReader(uc.getInputStream()));
        String line = "";
        while ((line = br.readLine()) != null) {
            if (!breakString.isEmpty() && line.contains(breakString)) {
                break;
            }
            htmlContent += line;
        }
        br.close();
    } catch (Exception e) {
        System.out.println(e);
    }
    return htmlContent;
}

基本上，我已经在纯的Java 应用程序（它是工作的罚款），写了这个，我只是想再次使用相同的。我用Google搜索，发现几页的篇幅（1,2,3,4),但他们没有涉及具体到 HttpURLConnection类直接（尽管这一问题，一些建议约了HTTPClient ，它被发现被德precated，我不想使用。）

Basically, I have written this in a pure java application (where it is working fine) and I just wanted to re-use the same. I have googled and found few SO pages (1,2,3,4), but none of them addresses the problem specific to HTTPURLConnection directly. (Though, some advised about HTTPClient, which is found to be deprecated which I don't want to use.)

添加 GETRESPONSE code（）的返回值200成功。

Adding getResponseCode() is returning the value as 200 successfully.

System.out.println("RESPONSE CODE : "+uc.getResponseCode());

我已经看过了参考页，其中规定

公共无效调用setRequestProperty（String域，字符串newValue）以

设定指定的请求头字段的值。该值将  仅由当前的URLConnection实例使用。这种方法可以  在建立连接之前只能被称为

Sets the value of the specified request header field. The value will only be used by the current URLConnection instance. This method can only be called before the connection is established.

如何设置连接前请求属性？由于每code，我们只 HttpURLConnection类）

         HttpURLConnection uc = (HttpURLConnection) u.openConnection();