2

我在 Galaxy Tab (v1) 上运行我的应用程序。
我添加了

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

允许。

我正在使用以下代码检查网站是否在线：

public boolean checkIfSite(final String url) {
    Data.isUp = false;

    new Thread(new Runnable() {
        public void run() {
            try {
                Data.isUp = InetAddress.getByName("google.com").isReachable(25000);
            } catch (UnknownHostException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }).start();
    return Data.isUp;
}

我运行它并抛出异常：

01-05 19:15:04.007: W/System.err(3303): java.net.UnknownHostException: Unable to resolve host "google.com": No address associated with hostname
01-05 19:15:04.007: W/System.err(3303):     at java.net.InetAddress.lookupHostByName(InetAddress.java:426)
01-05 19:15:04.007: W/System.err(3303):     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
01-05 19:15:04.007: W/System.err(3303):     at java.net.InetAddress.getByName(InetAddress.java:295)
01-05 19:15:04.007: W/System.err(3303):     at com.sonyericsson.extras.liveview.plugins.sandbox.SandboxPluginService$2.run(SandboxPluginService.java:184)
01-05 19:15:04.007: W/System.err(3303):     at java.lang.Thread.run(Thread.java:856)
01-05 19:15:04.007: W/System.err(3303): Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
01-05 19:15:04.011: W/System.err(3303):     at libcore.io.Posix.getaddrinfo(Native Method)
01-05 19:15:04.011: W/System.err(3303):     at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:55)
01-05 19:15:04.011: W/System.err(3303):     at java.net.InetAddress.lookupHostByName(InetAddress.java:411)
01-05 19:15:04.011: W/System.err(3303):     ... 4 more
4

1 回答 1

0

您是否尝试过使用http://google.com而不仅仅是 google.com？

正如@SLaks 所说，您的方法是错误的，因为您在启动线程后返回，需要使用回调（类似于您在 iOS 中对委托所做的操作）。

于 2014-01-09T09:14:09.357 回答