我无法在我的webview android中保存网站的密码

Question

我正在制作一个在webview上加载电报桌面网页（web.telegram.org）的应用程序。

我想登录一次。这是我的java代码（适用于其他网站但不适用于电报桌面。

final WebView   web = (WebView)popupView.findViewById(R.id.webView1);
            WebSettings settings = web.getSettings();
            settings.setDefaultTextEncodingName("utf-8");
            web.getSettings().setJavaScriptEnabled(true);
            web.getSettings().setLoadWithOverviewMode(true);
            web.getSettings().setUseWideViewPort(true);
            web.getSettings().setBuiltInZoomControls(true);
            web.loadUrl("http://google.com/");
            web.getSettings().getJavaScriptCanOpenWindowsAutomatically();
            web.getSettings().setAllowFileAccessFromFileURLs(true);
            web.getSettings().setAllowUniversalAccessFromFileURLs(true);
            web.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);

            web.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);

            web.setWebViewClient(new WebViewClient() {
                public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                    //Users will be notified in case there's an error (i.e. no internet connection)
                    Toast.makeText(getApplicationContext(), "Oh no! " + description, Toast.LENGTH_SHORT).show();
                }

                public void onPageFinished(WebView view, String url) {
                    CookieSyncManager.getInstance().sync();

                }
            });
            web.getSettings().setSavePassword(true);
            web.getSettings().setSaveFormData(true);

我该怎么办？请帮帮我！