Xamarin WebView 在特殊页面后加载 URL

Question

您好，我尝试对某些网站进行身份验证。登录页面后，该站点将我的 webview 重定向到另一个站点，新的 url 对我来说有重要的参数。本页return我的错误

"Web page is not available net::ERR_CONNECTION_REFUSED"

现在，在传递到登录页面后，我从新 url 获取参数，并尝试将 webview 重定向到我的页面。

public class MainActivity : AppCompatActivity
    {
        WebView app_view = null;
        WebSettings app_web_settings = null;
        WebChromeClient web_client;
        MyWebViewClient my_web_client;

        protected override void OnCreate(Bundle savedInstanceState)
        {
          base.OnCreate(savedInstanceState);

          // Set our view from the "main" layout resource
          SetContentView(Resource.Layout.activity_main);
          try
          {
            app_view = FindViewById(Resource.Id.webViewApp) as WebView;
            app_web_settings = app_view.Settings;
            app_web_settings.JavaScriptEnabled = true;
            app_web_settings.AllowUniversalAccessFromFileURLs = true;
            app_web_settings.DomStorageEnabled = true;
            app_web_settings.DatabaseEnabled = true;
            app_web_settings.SetRenderPriority(WebSettings.RenderPriority.High);
            app_view.SetLayerType(LayerType.Hardware, null);
            my_web_client = new MyWebViewClient(this);
            web_client = new WebChromeClient();
            app_view.SetWebViewClient(my_web_client);
            app_view.SetWebChromeClient(web_client);

            string app_url = "http://examplesite.com";
            app_view.LoadUrl(app_url);
            app_view.AddJavascriptInterface(new Foo(this), "foo");
          }
          catch (Exception ex)
          {
            Console.WriteLine("Error -> " + ex.ToString());
          }
        }
    }




 public class MyWebViewClient : WebViewClient
  {
    MainActivity act;
    public MyWebViewClient(MainActivity activity)
    {
      this.act = activity;
    }
    public override void OnPageStarted(WebView view, string url, Android.Graphics.Bitmap favicon)
    {
        base.OnPageStarted(view, url, favicon);
        if (url.Length > 7)
        {
          int index = url.IndexOf("?code=");
          if (index > -1)
          {
           //------------------------------
           // In this line, I want to redirect my page
           view.LoadUrl("file:///android_asset/app_pages/home.html"); 
          }
        } 
    }

    public override void OnReceivedError(WebView view, IWebResourceRequest request, WebResourceError error)
    {
        base.OnReceivedError(view, request, error);        
        //------------------------------
        // In this line, I want to redirect my page
        view.LoadUrl("file:///android_asset/app_pages/home.html");   
    }

    public override void OnPageFinished(WebView view, string url)
    {
        base.OnPageFinished(view, url);
    }

}

我尝试在 OnPageStarted 或 OnReceivedError 事件中加载URL。但是 webview 无法加载 this URL。我该如何解决这个问题？

Answer 1

尝试覆盖 MyWebViewClient 中的 ShouldOverrideUrlLoading 方法：

public override bool ShouldOverrideUrlLoading(WebView view, IWebResourceRequest request)
        {
            string url = request.Url.ToString();
            if (url.Length > 7)
            {
                int index = url.IndexOf("?code=");
                if (index > -1)
                {
                    //------------------------------
                    // In this line, I want to redirect my page
                    view.LoadUrl("file:///android_asset/app_pages/home.html");
                }
            }
            return true;
        }

Xamarin WebView 在特殊页面后加载 URL

Xamarin WebView load URL after special page

android

webview

xamarin