I'm implementing a method that gets the hostname of android device. I'm using InetAddress class for this. however, I'm getting fatal exception. Here's the method. I added a try/catch block, but still not working. Any help appreciated. Edited and added exception error
/**
* 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;
}
fatal exception
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)
Caused by: android.os.NetworkOnMainThreadException
Use another thread to do networking. AsyncTask may help you.