即使在应用程序关闭或通过按下android中的菜单按钮放入后台后,如何在Android中持久存储cookie？

Question

您好先生我是Android的新手,并希望持续cookie,直到用户点击signout.but目前我使用默认Cookiemanger几小时后删除cookie,我的应用程序变得反应迟钝所以应用程序无法进一步认证调用服务器获取数据和应用程序死亡.

我已经看到很多代码并使用cookie存储来保持cookie活着,但我失败了.我无法理解在哪里编写代码,这样每次我打电话给服务器然后cookie自动进入服务器.

这是我的代码:

public class PersistentCookieStore implements CookieStore {

/**
 * The default preferences string.
 */
private final static String PREF_DEFAULT_STRING = "";

/**
 * The preferences name.
 */
private final static String PREFS_NAME = PersistentCookieStore.class.getName();

/**
 * The preferences session cookie key.
 */
private final static String PREF_SESSION_COOKIE = "session_cookie";

private CookieStore mStore;
private Context mContext;

/**
 * @param context The application context
 */
public PersistentCookieStore(Context context) {
    // prevent context leaking by getting the application context
    mContext = context.getApplicationContext();

    // get the default in memory store and if there is a cookie stored in shared preferences,
    // we added it to the cookie store
    mStore = new CookieManager().getCookieStore();
    String jsonSessionCookie = getJsonSessionCookieString();
    if (!jsonSessionCookie.equals(PREF_DEFAULT_STRING)) {
        Gson gson = new Gson();
        HttpCookie cookie = gson.fromJson(jsonSessionCookie, HttpCookie.class);
        mStore.add(URI.create(cookie.getDomain()), cookie);
    }
}

@Override
public void add(URI uri, HttpCookie cookie) {
    if (cookie.getName().equals("sessionid")) {
        // if the cookie that the cookie store attempt to add is a session cookie,
        // we remove the older cookie and save the new one in shared preferences
        remove(URI.create(cookie.getDomain()), cookie);
        saveSessionCookie(cookie);
    }

    mStore.add(URI.create(cookie.getDomain()), cookie);
}

@Override
public List<HttpCookie> get(URI uri) {
    return mStore.get(uri);
}

@Override
public List<HttpCookie> getCookies() {
    return mStore.getCookies();
}

@Override
public List<URI> getURIs() {
    return mStore.getURIs();
}

@Override
public boolean remove(URI uri, HttpCookie cookie) {
    return mStore.remove(uri, cookie);
}

@Override
public boolean removeAll() {
    return mStore.removeAll();
}

private String getJsonSessionCookieString() {
    return getPrefs().getString(PREF_SESSION_COOKIE, PREF_DEFAULT_STRING);
}

/**
 * Saves the HttpCookie to SharedPreferences as a json string.
 *
 * @param cookie The cookie to save in SharedPreferences.
 */
private void saveSessionCookie(HttpCookie cookie) {
    Gson gson = new Gson();
    String jsonSessionCookieString = gson.toJson(cookie);
    SharedPreferences.Editor editor = getPrefs().edit();
    editor.putString(PREF_SESSION_COOKIE, jsonSessionCookieString);
    editor.apply();
}

private SharedPreferences getPrefs() {
    return mContext.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
}

}

之后,我使用此代码:

 CookieManager cookieManager = new CookieManager(
 new PersistentCookieStore(mContext), CookiePolicy.ACCEPT_ORIGINAL_SERVER);
 CookieHandler.setDefault(cookieManager);

在我的启动器上创建方法的活动,它第一次运行良好..但在后台离开应用程序一小时或两小时后,它释放cookie并请求不发送到服务器,因为身份验证.

所以请建议我正确的位置或活动来添加此代码或一些处理持久性cookie的最佳方法.蚂蚁帮助将在先进的过程中受到赞