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我在我的应用程序中试验错误，当单元格告诉它已连接到互联网时，但是当您尝试连接 google play 或浏览器时，您会看到没有互联网。

当用户处于 Wifi 范围的限制时，或者当 3g 信号非常差，或者设备的硬件不太好（我在使用 Android 4.1.2 的 Samsung Advance 时遇到很多问题）时，可能会发生这种情况

结果是我有很多错误，例如：

ECONNRESET (Connection reset by peer)

或者

java.net.UnknownHostException: Unable to resolve host "mysite.com": No address associated with hostname
   at java.net.InetAddress.lookupHostByName(InetAddress.java:424)
   at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
   at java.net.InetAddress.getAllByName(InetAddress.java:214)
   at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
   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.myapp.action.CapturaDAO.uploadCapturas(CapturaDAO.java:70)
   at com.myapp.action.SyncData.doInBackground(SyncData.java:148)
   at com.myapp.action.SyncData.doInBackground(SyncData.java:1)
   at android.os.AsyncTask$2.call(AsyncTask.java:287)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
   at java.util.concurrent.FutureTask.run(FutureTask.java:137)
   at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
   at java.lang.Thread.run(Thread.java:856)
Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
   at libcore.io.Posix.getaddrinfo(Posix.java)
   at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:55)
   at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
   at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
   at java.net.InetAddress.getAllByName(InetAddress.java:214)
   at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
   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.myapp.action.CapturaDAO.uploadCapturas(CapturaDAO.java:70)
   at com.myapp.action.SyncData.doInBackground(SyncData.java:148)
   at com.myapp.action.SyncData.doInBackground(SyncData.java:1)
   at android.os.AsyncTask$2.call(AsyncTask.java:287)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
   at java.util.concurrent.FutureTask.run(FutureTask.java:137)
   at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
   at java.lang.Thread.run(Thread.java:856)
Caused by: libcore.io.ErrnoException: getaddrinfo failed: ENETUNREACH (Network is unreachable)
   at libcore.io.Posix.getaddrinfo(Posix.java)
   at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:55)
   at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
   at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
   at java.net.InetAddress.getAllByName(InetAddress.java:214)
   at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
   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.myapp.action.CapturaDAO.uploadCapturas(CapturaDAO.java:70)
   at com.myapp.action.SyncData.doInBackground(SyncData.java:148)
   at com.myapp.action.SyncData.doInBackground(SyncData.java:1)
   at android.os.AsyncTask$2.call(AsyncTask.java:287)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
   at java.util.concurrent.FutureTask.run(FutureTask.java:137)
   at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
   at java.lang.Thread.run(Thread.java:856)

加载时，它会持续很长时间。

我的第一个问题是：尝试连接主机时是否消耗高电量？？？

我真正的问题是：是否可以处理此案？有没有办法在系统说有互联网时检测到没有互联网？

编辑：

我正在使用该方法检查互联网连接：

public static boolean isOnline(Context ctx) {
    ConnectivityManager cm = (ConnectivityManager) ctx
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = cm.getActiveNetworkInfo();
    if (netInfo != null && netInfo.isConnectedOrConnecting()) {
        return true;
    }
    return false;
}
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1 回答 1

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我的第一个问题是：尝试连接主机时是否消耗高电量？？？

电池消耗应该是正常的，因为它正在使用 wi-fi 或移动无线电。

我真正的问题是：有可能处理这个案子吗？有没有办法在系统说有互联网时检测到没有互联网？

您可以使用 URLConnection 的setConnectionTimeput()方法为您的请求添加 30 秒的超时。如果连接超时，您可以通知用户连接较弱。

于 2014-11-24T18:17:07.643 回答