ErrnoException：改变使用ICS WiFi网络时EHOSTUNREACH（没有到主机的路由）：isConnected失败 [英] ErrnoException: isConnected failed: EHOSTUNREACH (No route to host) when changing the wifi network using ICS

问题描述

在使用我的IC上的应用程序后，我改变我从networkA WIFI网络，以网络B的图像的所有请求开始回来有例外。

When using my app on ics, after I change my wifi network from networkA to networkB all the requests for images start coming back with an exception.

失败，除了

> org.apache.http.conn.HttpHostConnectException: Connection to
> https://m1.testapp.com refused    at
> org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:183)
>   at
> org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
>   at
> org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
>   at
> org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
>   at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
>   at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
>   at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
>   at
> com.testApp.android.ws.PooledRequestProcessor$Runner.run(PooledRequestProcessor.java:298)
>   at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
>   at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
>   at java.lang.Thread.run(Thread.java:856)  Caused by:
> java.net.ConnectException: failed to connect to /109.233.153.38 (port
> 443) after 20000ms: isConnected failed: EHOSTUNREACH (No route to
> host)     at
> org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:181)
>   ... 10 more  Caused by: java.net.SocketException: failed to connect
> to /109.233.153.38 (port 443) after 20000ms: isConnected failed:
> EHOSTUNREACH (No route to host)   at
> libcore.io.IoBridge.isConnected(IoBridge.java:220)    at
> libcore.io.IoBridge.connectErrno(IoBridge.java:152)   at
> libcore.io.IoBridge.connect(IoBridge.java:112)    at
> java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)    at
> java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)    at
> java.net.Socket.connect(Socket.java:842)      at
> org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
>   at
> org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
>   ... 10 more  Caused by: libcore.io.ErrnoException: isConnected
> failed: EHOSTUNREACH (No route to host)   at
> libcore.io.IoBridge.isConnected(IoBridge.java:201)

最奇怪的是，即使卸载应用程序，并重新安装它不会修复它，只需打开手机，然后对。

The strangest thing is that even uninstalling the app and reinstalling it wont fix it, just turning the phone off and on.

我看到一个类似的问题在这里<一href="http://groups.google.com/group/newsrob/browse_thread/thread/ea2f26d9d1753b79/5800e268eeab399c#5800e268eeab399c" rel="nofollow">http://groups.google.com/group/newsrob/browse_thread/thread/ea2f26d9d1753b79/5800e268eeab399c#5800e268eeab399c 。该问题不会发生在手机上使用4.0.3，只是对那些与4.0.1，并且似乎没有更新是在欧洲呢。

I saw a similar problem here http://groups.google.com/group/newsrob/browse_thread/thread/ea2f26d9d1753b79/5800e268eeab399c#5800e268eeab399c . The problem is not happening on phones with 4.0.3, just on the ones with 4.0.1, and the update doesnt seem to be available in Europe yet.

推荐答案

也许这是采取一段时间的切换要发生的某些原因？您可以检查，看看是否有发出请求之前，活动的网络连接：

Maybe it's taking a while for the switch over to take place for some reason? You can check to see if there is an active network connection before making the request:

ConnectivityManager connectivityManager = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo                 = connectivityManager.getActiveNetworkInfo();

if (networkInfo != null && networkInfo.isConnected() && networkInfo.isAvailable())
{
    // DO WHAT YOU NEED TO DO ON THE NETWORK
}
else
{
    // PROMPT USER THAT NETWORK IS DISCONNECTED

        Toast.makeText(this, "There is no active network connection!", 5000).show();
}

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