Xamarin forms android webview视频全屏

// 在Xamarin Forms项目中创建一个WebView页面
public class WebViewPage : ContentPage
{
    public WebViewPage()
    {
        var webView = new WebView();
        webView.Source = "https://example.com"; // 设置WebView加载的网页地址
        Content = webView;
    }
}

// 在Android项目中创建一个自定义的WebViewRenderer类
[assembly: ExportRenderer(typeof(WebView), typeof(CustomWebViewRenderer))]
namespace YourNamespace.Droid
{
    public class CustomWebViewRenderer : WebViewRenderer
    {
        public CustomWebViewRenderer(Context context) : base(context)
        {
        }

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

            if (Control != null)
            {
                Control.Settings.JavaScriptEnabled = true;
                Control.SetWebChromeClient(new CustomWebChromeClient());
            }
        }
    }

    // 创建一个自定义的WebChromeClient类，用于处理WebView的相关事件和行为
    public class CustomWebChromeClient : WebChromeClient
    {
        private View customView;
        private ICustomViewCallback customViewCallback;

        public override void OnShowCustomView(View view, ICustomViewCallback callback)
        {
            base.OnShowCustomView(view, callback);

            if (customView != null)
            {
                callback.OnCustomViewHidden();
                return;
            }

            customView = view;
            customViewCallback = callback;

            var activity = (Activity)Context;
            activity.RequestedOrientation = ScreenOrientation.Landscape; // 设置横屏显示

            var decorView = activity.Window.DecorView as FrameLayout;
            decorView.AddView(customView, new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent));
        }

        public override void OnHideCustomView()
        {
            base.OnHideCustomView();

            if (customView == null)
                return;

            var activity = (Activity)Context;
            activity.RequestedOrientation = ScreenOrientation.Portrait; // 恢复竖屏显示

            var decorView = activity.Window.DecorView as FrameLayout;
            decorView.RemoveView(customView);
            customView = null;

            customViewCallback.OnCustomViewHidden();
            customViewCallback = null;
        }
    }
}