推荐订阅源

 <BlazorWebView HostPage="wwwroot/index.html" BlazorWebViewInitialized="blazorWebView_BlazorWebViewInitialized">

 private void blazorWebView_BlazorWebViewInitialized(object sender, Microsoft.AspNetCore.Components.WebView.BlazorWebViewInitializedEventArgs e)
        {
           
#if ANDROID
          e.WebView.Settings.MixedContentMode = Android.Webkit.MixedContentHandling.AlwaysAllow;
#endif
        }

然后在 Android  平台下 的AndroidManifest.xml 文件中的 application节点中添加 android:usesCleartextTraffic="true"

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <application android:allowBackup="true" android:icon="@mipmap/appicon" android:roundIcon="@mipmap/appicon_round" android:supportsRtl="true" android:usesCleartextTraffic="true"></application>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="33" />
</manifest>