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我正在实现一个获取android设备主机名的方法。我为此使用InetAddress类。不过,我得到致命的异常。这是方法。我添加了一个try/catch块,但仍然无法工作。任何帮助赞赏。编辑和添加的异常错误如何从android设备获取主机名
/**
* getHostname returns the hostname of android device as string
*
* @param context
* @return hostname
*/
public String getHostname(Context context) {
String hostName;
try {
InetAddress netHost = InetAddress.getLocalHost();
hostName = netHost.getHostName();
} catch (UnknownHostException ex) {
hostName = null;
}
return hostName;
}
致命异常
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.george.droidnet, PID: 23439
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.george.droidnet/com.example.george.droidnet.TcpConfigActivity}: android.os.NetworkOnMainThreadException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)
at java.net.InetAddress.lookupHostByName(InetAddress.java:431)
at java.net.InetAddress.getLocalHost(InetAddress.java:409)
at com.example.george.droidnet.TcpConfigActivity.getHostname(TcpConfigActivity.java:100)
at com.example.george.droidnet.TcpConfigActivity.onCreate(TcpConfigActivity.java:40)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
“我收到致命异常” - 请编辑您的问题并发布**与此异常相关的整个Java堆栈跟踪**。 – CommonsWare