从AndroidHttpClient到HttpUrlConnection的转换

Question

我编写了下面的代码，它工作得很好：

private static final String URL = "http://test.net/api/mobile/logininfo";
private AndroidHttpClient client = AndroidHttpClient.newInstance("");

HttpPost request = new HttpPost(URL);
request.addHeader("Content-Type", "application/json; charset=utf-8");
request.addHeader("Cookie", sessionId);

String username = "test";
String osVersion = android.os.Build.VERSION.RELEASE;

String params = "{\"username\":\"" + username
                        + "\",\"osVersion\":\"" + osVersion
                        + "\"}";

request.setEntity(new StringEntity(params));
HttpResponse response = client.execute(request);

String res = new BasicResponseHandler()
                        .handleResponse(response);
                JSONObject obj = (JSONObject) new JSONTokener(res).nextValue();

//do something with JSONObject

然而，当我阅读开发人员网络处理最佳实践(http://android-developers.blogspot.com/2011/09/androids-http-clients.html)时，我发现HttpURLConnection比AndroidHttpClient更好。

如何将代码转换为使用HttpURLConnection而不是AndroidHttpClient？

谢谢

Answer 1

我找到了解决办法。以下是HttpURLConnection的等效代码：

URL url = new URL("http://test.net/api/mobile/logininfo");
HttpURLConnection conn = (HttpURLConnection) url
        .openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Cookie", sessionId);
conn.setRequestProperty("Content-Type",
        "application/json; charset=utf-8");
conn.setRequestProperty("Expect", "100-continue");

String osVersion = android.os.Build.VERSION.RELEASE;

String params = "{\"username\":\"" + username
        + "\",\"osVersion\":\"" + osVersion
        + "\"}";

PrintWriter out = new PrintWriter(conn.getOutputStream());
out.println(params);
out.flush();

conn.connect();
int responseCode = conn.getResponseCode();

if (responseCode != 200)
        return null;

StringBuilder response = new StringBuilder();
        Scanner scanner = new Scanner(conn.getInputStream());
while (scanner.hasNext()) {
        response.append(scanner.nextLine());
}
scanner.close();

JSONObject obj = (JSONObject) new JSONTokener(
    response.toString()).nextValue();

//do something with JSONObject

谢谢