Make Android WebView not store cookies or passwords

Question

I use an Android WebView for Twitter OAuth: Twitter asks the user to log in and authorize the application, I retrieve the access token and persist it in my application.

Answer 1

This is the best answer I have seen in this context

    webView.clearCache(true);
    webView.clearHistory();
    WebSettings webSettings = webView.getSettings();
    webSettings.setSaveFormData(false);
    webSettings.setSavePassword(false); // Not needed for API level 18 or greater (deprecated)

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
        CookieManager.getInstance().removeAllCookies(null);
        CookieManager.getInstance().flush();
    } else {
        CookieSyncManager cookieSyncMngr = CookieSyncManager.createInstance(this);
        cookieSyncMngr.startSync();
        CookieManager cookieManager = CookieManager.getInstance();
        cookieManager.removeAllCookie();
        cookieManager.removeSessionCookie();
        cookieSyncMngr.stopSync();
        cookieSyncMngr.sync();
    }