如下代码,为何运行时会崩溃?try {
serverAddr = InetAddress.getByName ("xx.xx.xx.xx");
Log.d ( "TCP" , "C: Connecting..." );
socket = new Socket(serverAddr,80);
} catch (IOException e) {
// TODO Auto-generated catch block
Log.d ( "TCP" , "C: Connecting Failed" );
e.printStackTrace();
}执行到 socket = new Socket(serverAddr,80);就会崩溃。log如下:
05-07 02:46:00.608: D/TCP(879): C: Connecting...
05-07 02:46:00.639: D/AndroidRuntime(879): Shutting down VM
05-07 02:46:00.659: W/dalvikvm(879): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
05-07 02:46:00.868: E/AndroidRuntime(879): FATAL EXCEPTION: main
05-07 02:46:00.868: E/AndroidRuntime(879): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.emulesearch/com.example.emulesearch.DisplayResultActivity}: android.os.NetworkOnMainThreadException
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.os.Handler.dispatchMessage(Handler.java:99)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.os.Looper.loop(Looper.java:137)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.main(ActivityThread.java:5041)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.lang.reflect.Method.invokeNative(Native Method)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.lang.reflect.Method.invoke(Method.java:511)
05-07 02:46:00.868: E/AndroidRuntime(879): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-07 02:46:00.868: E/AndroidRuntime(879): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-07 02:46:00.868: E/AndroidRuntime(879): at dalvik.system.NativeStart.main(Native Method)
05-07 02:46:00.868: E/AndroidRuntime(879): Caused by: android.os.NetworkOnMainThreadException
05-07 02:46:00.868: E/AndroidRuntime(879): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
05-07 02:46:00.868: E/AndroidRuntime(879): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
05-07 02:46:00.868: E/AndroidRuntime(879): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
05-07 02:46:00.868: E/AndroidRuntime(879): at libcore.io.IoBridge.connect(IoBridge.java:112)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.Socket.startupSocket(Socket.java:566)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.Socket.<init>(Socket.java:225)
05-07 02:46:00.868: E/AndroidRuntime(879): at com.example.emulesearch.DisplayResultActivity.onCreate(DisplayResultActivity.java:64)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.Activity.performCreate(Activity.java:5104)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
05-07 02:46:00.868: E/AndroidRuntime(879): ... 11 more
05-07 02:46:01.339: D/dalvikvm(879): GC_CONCURRENT freed 112K, 8% free 2679K/2912K, paused 6ms+5ms, total 431ms
05-07 02:46:07.869: I/Process(879): Sending signal. PID: 879 SIG: 9
serverAddr = InetAddress.getByName ("xx.xx.xx.xx");
Log.d ( "TCP" , "C: Connecting..." );
socket = new Socket(serverAddr,80);
} catch (IOException e) {
// TODO Auto-generated catch block
Log.d ( "TCP" , "C: Connecting Failed" );
e.printStackTrace();
}执行到 socket = new Socket(serverAddr,80);就会崩溃。log如下:
05-07 02:46:00.608: D/TCP(879): C: Connecting...
05-07 02:46:00.639: D/AndroidRuntime(879): Shutting down VM
05-07 02:46:00.659: W/dalvikvm(879): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
05-07 02:46:00.868: E/AndroidRuntime(879): FATAL EXCEPTION: main
05-07 02:46:00.868: E/AndroidRuntime(879): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.emulesearch/com.example.emulesearch.DisplayResultActivity}: android.os.NetworkOnMainThreadException
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.os.Handler.dispatchMessage(Handler.java:99)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.os.Looper.loop(Looper.java:137)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.main(ActivityThread.java:5041)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.lang.reflect.Method.invokeNative(Native Method)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.lang.reflect.Method.invoke(Method.java:511)
05-07 02:46:00.868: E/AndroidRuntime(879): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-07 02:46:00.868: E/AndroidRuntime(879): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-07 02:46:00.868: E/AndroidRuntime(879): at dalvik.system.NativeStart.main(Native Method)
05-07 02:46:00.868: E/AndroidRuntime(879): Caused by: android.os.NetworkOnMainThreadException
05-07 02:46:00.868: E/AndroidRuntime(879): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
05-07 02:46:00.868: E/AndroidRuntime(879): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
05-07 02:46:00.868: E/AndroidRuntime(879): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
05-07 02:46:00.868: E/AndroidRuntime(879): at libcore.io.IoBridge.connect(IoBridge.java:112)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.Socket.startupSocket(Socket.java:566)
05-07 02:46:00.868: E/AndroidRuntime(879): at java.net.Socket.<init>(Socket.java:225)
05-07 02:46:00.868: E/AndroidRuntime(879): at com.example.emulesearch.DisplayResultActivity.onCreate(DisplayResultActivity.java:64)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.Activity.performCreate(Activity.java:5104)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-07 02:46:00.868: E/AndroidRuntime(879): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
05-07 02:46:00.868: E/AndroidRuntime(879): ... 11 more
05-07 02:46:01.339: D/dalvikvm(879): GC_CONCURRENT freed 112K, 8% free 2679K/2912K, paused 6ms+5ms, total 431ms
05-07 02:46:07.869: I/Process(879): Sending signal. PID: 879 SIG: 9
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