当尝试通过android应用程序中的DDN（dynu.com）获取网页内容时，它会显示：此浏览器不支持帧。该网页只显示一个数字，该数字会不时更改。这只发生在试图通过DDN获取内容时，而不是在我使用路由器的公共ip地址时。
完整错误消息：
2021-07-05 16:30:08.096 25391-25391/com.example.esp32 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.esp32, PID: 25391
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.esp32/com.example.esp32.MainActivity}: java.lang.NumberFormatException: For input string: "<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html>
<!-- WEB REDIRECTION PROVIDED BY DYNU.COM http://www.dynu.com/ -->
<head>
<title>The Doors</title>
<link rel="icon" href="http://MY_PUBLIC_IP/favicon.ico" type="image/ico">
<link rel="shortcut icon" href="http://MY_PUBLIC:IP/favicon.ico">
</head>
<!--
<script language="JavaScript">
if(window != top) {
top.location.href = location.href;
}
</script>
-->
<frameset marginwidth=0 marginheight=0 frameborder=0 border=0 rows =" 1,*">
<frame src="emptypage">
<frame src="http://MY_PUBLIC_IP/" name="main">
<noframes>This browser does not support frames. Please <a href="http://MY_PUBLIC_IP/" target="_top">click here</a> to access the website.</noframes>
</frameset>
</html>"
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3437)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2041)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7386)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)
Caused by: java.lang.NumberFormatException: For input string: "<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html>
<!-- WEB REDIRECTION PROVIDED BY DYNU.COM http://www.dynu.com/ -->
<head>
<title>The Doors</title>
<link rel="icon" href="http://MY_PUBLIC_IP/favicon.ico" type="image/ico">
<link rel="shortcut icon" href="http://MY_PUBLIC_IP/favicon.ico">
</head>
<!--
<script language="JavaScript">
if(window != top) {
top.location.href = location.href;
}
</script>
-->
<frameset marginwidth=0 marginheight=0 frameborder=0 border=0 rows =" 1,*">
<frame src="emptypage">
<frame src="http://myPublicIp/" name="main">
<noframes>This browser does not support frames. Please <a href="http://MY_PUBLIC_IP/" target="_top">click here</a> to access the website.</noframes>
</frameset>
</html>"
at
java.lang.Integer.parseInt(Integer.java:615)
at java.lang.Integer.parseInt(Integer.java:650)
at com.example.esp32.MainActivity.setView(MainActivity.java:590)
at com.example.esp32.MainActivity.onCreate(MainActivity.java:417)
at android.app.Activity.performCreate(Activity.java:7802)
at android.app.Activity.performCreate(Activity.java:7791)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1306)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3273)
... 11 more
暂无答案！
目前还没有任何答案，快来回答吧！