Xamarin.Forms ERR_FILE_NOT_FOUND (file:///android_asset/Content/https://stackoverflow.com) 使用 HybridWebViewSample

Question

我按照 post 创建了一个自定义 WebView 来与客户端交互 JavaScript：https://docs.microsoft.com/es-es/xamarin/xamarin-forms/app-fundamentals/custom-renderer/hybridwebview

但是当我尝试加载页面时，例如 https://www.google.es, the wevView shows an "ERROR_FILE_NOT_FOUND" loading the page "file:///android_asset/Content/https://www.google.es"

这是 HybridWebViewRenderer 的 OnElementChanged：

protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
{           
    base.OnElementChanged(e);

    if (e.OldElement != null)
    {
        Control.RemoveJavascriptInterface("jsBridge");
        ((HybridWebView)Element).Cleanup();
    }
    if (e.NewElement != null)
    {
        Control.SetWebViewClient(new JavascriptWebViewClient($"javascript: {JavascriptFunction}"));
        Control.AddJavascriptInterface(new JSBridge(this), "jsBridge");
        Control.LoadUrl($"file:///android_asset/Content/{((HybridWebView)Element).Uri}");
    }
}

已编辑：hybridWebView 似乎不适用于外部页面！

有什么建议吗？

Answer 1

已解决：

更改 LoadUrl 方法：

Control.LoadUrl($"file:///android_asset/Content/{((HybridWebView)Element).Uri}");

作者：

UrlWebViewSource source = Element.Source as UrlWebViewSource;
Control.LoadUrl(source.Url);

适用于外部网站，可以检索 JavaScript 回调并发送 JavaScript 代码。这是完整代码：

protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
{           
    base.OnElementChanged(e);

    if (e.OldElement != null)
    {
        Control.RemoveJavascriptInterface("jsBridge");
        ((HybridWebView)Element).Cleanup();
    }
    if (e.NewElement != null)
    {
        Control.SetWebViewClient(new JavascriptWebViewClient($"javascript: {JavascriptFunction}"));
        Control.AddJavascriptInterface(new JSBridge(this), "jsBridge");
        UrlWebViewSource source = Element.Source as UrlWebViewSource;
        Control.LoadUrl(source.Url);
    }
}

Xamarin.Forms ERR_FILE_NOT_FOUND (file:///android_asset/Content/https://stackoverflow.com) 使用 HybridWebViewSample

Xamarin.Forms ERR_FILE_NOT_FOUND (file:///android_asset/Content/https://stackoverflow.com) using HybridWebViewSample

xamarin.forms

webview

custom-renderer