Convert idn domain

V2rayNG/app/src/main/kotlin/com/v2ray/ang/ui/MainActivity.kt

@@ -488,7 +488,7 @@ class MainActivity : BaseActivity(), NavigationView.OnNavigationItemSelectedList
                 if (!it.second.enabled) {
                     return@forEach
                 }
-                val url = it.second.url
+                val url = Utils.idnToASCII(it.second.url)
                 if (!Utils.isValidUrl(url)) {
                     return@forEach
                 }

V2rayNG/app/src/main/kotlin/com/v2ray/ang/util/Utils.kt

@@ -429,5 +429,21 @@ object Utils {
     fun removeWhiteSpace(str: String?): String? {
         return str?.replace(" ", "")
     }
+
+    fun idnToASCII(str: String): String {
+        var url = str
+        var prot = ""
+        if (url.startsWith(AppConfig.HTTPS_PROTOCOL)) {
+            url = url.substring(8)
+            prot = AppConfig.HTTPS_PROTOCOL
+        } else if (url.startsWith(AppConfig.HTTP_PROTOCOL)) {
+            url = url.substring(7)
+            prot = AppConfig.HTTP_PROTOCOL
+        }
+        url = prot + IDN.toASCII(url, IDN.ALLOW_UNASSIGNED)
+        if (url != str) return url else {
+            return str
+        }
+    }
 }