cookie持久化保存的有关问题

cookie持久化保存的问题
最近在做一个项目，先登录到服务器，获取cookie，再次访问的时候通过这个cookie访问，但是存过cookie之后下次访问服务器的时候，一直返回login first。代码如下，一个是登录的方法，一个是登录时附上cookie的方法。哪位前辈能指导下~ 感激不尽！

// 处理Login的访问
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public static String doLoginPost(String urlAddress, List params,
			ApplicationUtils app, SharedPreferences sp) {
		HttpPost httpPost = new HttpPost(urlAddress);

		HttpEntity he;
		try {
			he = new UrlEncodedFormEntity(params, "utf-8");
			httpPost.setEntity(he);

		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		}

		DefaultHttpClient hc = new DefaultHttpClient();
		try {
			HttpResponse ht = hc.execute(httpPost);
			// app.setCookies(hc.getCookieStore());

			List<Cookie> cookies = hc.getCookieStore().getCookies();
			System.out.println("cookies = " + hc.getCookieStore().getCookies());
			if (cookies.isEmpty()) {
				System.out.println("cookies is none");
			} else {
				for (int i = 0; i < cookies.size(); i++) {
					System.out.println(cookies.get(i).getName() + "="
							+ cookies.get(i).getValue());
					System.out.println(cookies.size());
				}
				// 牬?乩吹腸ookie只包含两个值
				Editor ed = sp.edit();
				ed.putString("cookie_token", cookies.get(0).toString());
				ed.putString("cookie_sessionid", cookies.get(1).toString());
				ed.commit();

			}

			// 连接成功
			if (ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				HttpEntity het = ht.getEntity();
				InputStream is = het.getContent();
				BufferedReader br = new BufferedReader(
						new InputStreamReader(is));
				String response = "";
				String readLine = null;
				while ((readLine = br.readLine()) != null) {
					// response = br.readLine();
					response = response + readLine;
				}
				is.close();
				br.close();

				// String str = EntityUtils.toString(he);
				System.out.println("response" + response);
				return response;
			} else {
				return "error";
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
			return "exception";
		} catch (IOException e) {
			e.printStackTrace();
			return "exception";
		}
	}

// 附加cookie的访问
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public static String doCookiePost(String urlAddress, List params,
			ApplicationUtils app, SharedPreferences sp) {
		HttpPost httpPost = new HttpPost(urlAddress);

		httpPost.setHeader("cookie",
				"sessionid = " + sp.getString("cookie_sessionid", "") + ";"
						+ "csrftoken = " + sp.getString("cookie_token", ""));
		// httpPost.setHeader("cookie",
		// "sessionid = " + sp.getString("cookie_sessionid", ""));
		System.out
				.println("cookie_token = " + sp.getString("cookie_token", ""));
		System.out.println("cookie_sessionid = "
				+ sp.getString("cookie_sessionid", ""));
		System.out.println("sessionid =" + sp.getString("cookie_sessionid", "")
				+ ";" + "csrftoken = " + sp.getString("cookie_token", ""));

		HttpEntity he;
		try {
			he = new UrlEncodedFormEntity(params, "utf-8");
			httpPost.setEntity(he);

		} catch (UnsupportedEncodingException e1) {
			e1.printStackTrace();
		}

		DefaultHttpClient hc = new DefaultHttpClient();
		// hc.setCookieStore(app.getCookies());
		try {
			// 得到服务器端的响应
			HttpResponse ht = hc.execute(httpPost);

			// 连接成功
			if (ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				HttpEntity het = ht.getEntity();
				InputStream is = het.getContent();
				BufferedReader br = new BufferedReader(
						new InputStreamReader(is));
				String response = "";
				String readLine = null;
				while ((readLine = br.readLine()) != null) {
					// response = br.readLine();
					response = response + readLine;
				}
				is.close();
				br.close();

				// String str = EntityUtils.toString(he);
				System.out.println("response" + response);
				return response;
			} else {
				return "error";
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
			return "exception";
		} catch (IOException e) {
			e.printStackTrace();
			return "exception";
		}
	}

------解决思路----------------------
存读cookies的方法

/**
	 * 将cookies 以StringBuffer类型保存到 SharedPreferences里
	 * 
	 * @param sb
	 */
	private static void SaveCookies(StringBuffer sb) {
		SharedPreferences settings = context.getSharedPreferences("sessionId",
				0);
		SharedPreferences.Editor editor = settings.edit();
		String cookies = sb.toString();
		editor.putString("cookies", cookies);
		editor.commit();
	}

	/** 从SharedPreferences读取cookies **/
	private static String LoadCookies() {
		SharedPreferences settings = context.getSharedPreferences("sessionId",
				0);
		String cookies = settings.getString("cookies", "");
		if (!"".equals(cookies)) {
			return cookies;
		}
		return "";
	}

请求需要存下cookies的时候

HttpPost hp = new HttpPost(url);
		if (values != null) {
			hp.setEntity(new UrlEncodedFormEntity(values, HTTP.UTF_8));
		}
		HttpClient client = getHttpClient();

		HttpResponse response = client.execute(hp);

		List<Cookie> cookies = ((AbstractHttpClient) client).getCookieStore()
				.getCookies();
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < cookies.size(); i++) {
			Cookie cookie = cookies.get(i);
			String cookieName = cookie.getName();
			String cookieValue = cookie.getValue();
			if (!TextUtils.isEmpty(cookieName)
					&& !TextUtils.isEmpty(cookieValue)) {
				sb.append(cookieName + "=");
				sb.append(cookieValue + ";");
			}
		}
		SaveCookies(sb);

需要带上cookies请求的时候

HttpPost hp = new HttpPost(url);
		HttpEntity entity = new UrlEncodedFormEntity(values, HTTP.UTF_8);
		hp.setEntity(entity);
		HttpClient client = getHttpClient();
		hp.setHeader("Cookie", LoadCookies());
		HttpResponse response = client.execute(hp);