android - Android WebView removeCookie

Question

Android 使用 CookieManager 来管理 cookie。但是只有一种方法“removeAllCookies()”来删除 cookie，这会删除所有 cookie。现在我只想删除与指定 url 关联的 cookie，其他 cookie 不会被删除。在这种情况下，我该怎么办？

Answer 1

我对@summerxiaqing 的回答做了一些小改动，我检查了它是否有效。（添加https，将空检查更改为TextUtils.isEmpty，通过参数传递CookieManager）

     public static void clearCookieByUrl(String url, CookieManager pCookieManager, CookieSyncManager pCookieSyncManager) {
        Uri uri = Uri.parse(url);
        String host = uri.getHost();
        clearCookieByUrlInternal(url,pCookieManager,pCookieSyncManager);
        clearCookieByUrlInternal("http://." + host,pCookieManager,pCookieSyncManager);
        clearCookieByUrlInternal("https://." + host,pCookieManager,pCookieSyncManager);
    }

     private static void clearCookieByUrlInternal(String url, CookieManager pCookieManager, CookieSyncManager pCookieSyncManager) {
        if (TextUtils.isEmpty(url)) {
            return;
        }
        String cookieString = pCookieManager.getCookie(url);
        Vector<String> cookie = getCookieNamesByUrl(cookieString);
        if (cookie == null || cookie.isEmpty()) {
            return;
        }
        int len = cookie.size();
        for (int i = 0; i < len; i++) {
            pCookieManager.setCookie(url, cookie.get(i) + "=-1");
        }
        pCookieSyncManager.sync();
    }

    private static Vector<String> getCookieNamesByUrl(String cookie) {
        if (TextUtils.isEmpty(cookie)) {
            return null;
        }
        String[] cookieField = cookie.split(";");
        int len = cookieField.length;
        for (int i = 0; i < len; i++) {
            cookieField[i] = cookieField[i].trim();
        }
        Vector<String> allCookieField = new Vector<String>();
        for (int i = 0; i < len; i++) {
            if (TextUtils.isEmpty(cookieField[i])) {
                continue;
            }
            if (!cookieField[i].contains("=")) {
                continue;
            }
            String[] singleCookieField = cookieField[i].split("=");
            allCookieField.add(singleCookieField[0]);
        }
        if (allCookieField.isEmpty()) {
            return null;
        }
        return allCookieField;
    }

活动内部

mContext = getApplicationContext();
CookieManager mCookieManager = CookieManager.getInstance();
CookieSyncManager mCookieSyncManager = CookieSyncManager.createInstance(mContext);
clearCookieByUrl("http://example.com", mCookieManager, mCookieSyncManager);

Answer 2

1、Android暂不支持该接口。

2，我们项目中的一个解决方法。

sCookieManager = CookieManager.getInstance();

public static void clearCookieByUrl(String url) {

    Uri uri = Uri.parse(url);
    String host = uri.getHost();
    clearCookieByUrlInternal(url);
    clearCookieByUrlInternal("http://." + host);
  }

/**
   * clear cookie by url
   * @param url
   */
  private static void clearCookieByUrlInternal(String url) {
    if (Utils.isStringEmpty(url)) {
      return;
    }
    String cookieString = sCookieManager.getCookie(url);
    Vector<String> cookie = getCookieNamesByUrl(cookieString);
    if (cookie == null || cookie.isEmpty()) {
      return;
    }
    int len = cookie.size();
    for (int i = 0; i < len; i++) {
      sCookieManager.setCookie(url, cookie.get(i) + "=-1");
    }
    sCookieSyncManager.sync();
  }

private static Vector<String> getCookieNamesByUrl(String cookie) {
    if (Utils.isStringEmpty(cookie)) {
      return null;
    }
    String[] cookieField = cookie.split(";");
    int len = cookieField.length;
    for (int i = 0; i < len; i++) {
      cookieField[i] = cookieField[i].trim();
    }
    Vector<String> allCookieField = new Vector<String>();
    for (int i = 0; i < len; i++) {
      if (Utils.isStringEmpty(cookieField[i])) {
        continue;
      }
      if (!cookieField[i].contains("=")) {
        continue;
      }
      String[] singleCookieField = cookieField[i].split("=");
      allCookieField.add(singleCookieField[0]);
    }
    if (allCookieField.isEmpty()) {
      return null;
    }
    return allCookieField;
  }

注意：在某些android版本中（我没有确切的版本号，我的经验是android 2.3），系统将使用host作为cookie域，而另一方面，系统将使用'.' + 主机作为 cookie 域。因此，更好的方法是两者都清楚。

Answer 3

另外两个答案适用于 Lollipop 之前的版本。在较新的版本中，您应该替换：

sCookieSyncManager.sync();

和：

sCookieManager.flush();