CookieTool.java

import android.os.Build;
import android.webkit.CookieManager;
import android.webkit.CookieSyncManager;
import android.webkit.WebView;

import java.util.ArrayList;

public class CookieTool {
    public static String filterCookie(String url) {
        CookieManager manager = CookieManager.getInstance();
        String cookie = manager.getCookie(url);

        String[] cookies = cookie.split(";");
        ArrayList<String> cookieKeyList = new ArrayList<>();
        StringBuilder cookieSb = new StringBuilder();
        for (int i = 0 ; i < cookies.length ; i++) {
            String[] temp = cookies[i].split("=");
            String key = temp[0].trim();
            if (cookieKeyList.contains(key) || temp.length < 2) {
                continue;
            }
            cookieKeyList.add(key);
            cookieSb.append(cookies[i]).append(";");
        }

        return cookieSb.substring(0, cookieSb.length() - 1);
    }

    public static void restoreCookie(String cookie, WebView webview, String url) {
        CookieManager manager = CookieManager.getInstance();

        webview.clearCache(true);
        webview.clearHistory();

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
            manager.removeAllCookies(null);
            manager.flush();
        } else {
            CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(webview.getContext());
            cookieSyncMngr.startSync();
            manager.removeAllCookie();
            manager.removeSessionCookie();
            cookieSyncMngr.stopSync();
            cookieSyncMngr.sync();
        }

        manager.setAcceptCookie(true);
        String[] cookies = cookie.split(";");
        for (int i = 0 ; i < cookies.length ; i++) {
            manager.setCookie(url, cookies[i].trim());
        }
    }
}