android 连接服务器和客户端 这是什么问题

07-02 14:11:18.726: E/AndroidRuntime(2881): FATAL EXCEPTION: main
07-02 14:11:18.726: E/AndroidRuntime(2881): android.os.NetworkOnMainThreadException
07-02 14:11:18.726: E/AndroidRuntime(2881): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
07-02 14:11:18.726: E/AndroidRuntime(2881): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
07-02 14:11:18.726: E/AndroidRuntime(2881): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
07-02 14:11:18.726: E/AndroidRuntime(2881): at libcore.io.IoBridge.connect(IoBridge.java:112)
07-02 14:11:18.726: E/AndroidRuntime(2881): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
07-02 14:11:18.726: E/AndroidRuntime(2881): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
07-02 14:11:18.726: E/AndroidRuntime(2881): at java.net.Socket.connect(Socket.java:842)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.tju.myaccount.activity.RegisterActivity.getNetWorkData(RegisterActivity.java:142)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.tju.myaccount.activity.RegisterActivity.access$4(RegisterActivity.java:128)
07-02 14:11:18.726: E/AndroidRuntime(2881): at org.tju.myaccount.activity.RegisterActivity$ViewOcl.onClick(RegisterActivity.java:112)
07-02 14:11:18.726: E/AndroidRuntime(2881): at android.view.View.performClick(View.java:4204)
07-02 14:11:18.726: E/AndroidRuntime(2881): at android.view.View$PerformClick.run(View.java:17355)
07-02 14:11:18.726: E/AndroidRuntime(2881): at android.os.Handler.handleCallback(Handler.java:725)
07-02 14:11:18.726: E/AndroidRuntime(2881): at android.os.Handler.dispatchMessage(Handler.java:92)
07-02 14:11:18.726: E/AndroidRuntime(2881): at android.os.Looper.loop(Looper.java:137)
07-02 14:11:18.726: E/AndroidRuntime(2881): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-02 14:11:18.726: E/AndroidRuntime(2881): at java.lang.reflect.Method.invokeNative(Native Method)
07-02 14:11:18.726: E/AndroidRuntime(2881): at java.lang.reflect.Method.invoke(Method.java:511)
07-02 14:11:18.726: E/AndroidRuntime(2881): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-02 14:11:18.726: E/AndroidRuntime(2881): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-02 14:11:18.726: E/AndroidRuntime(2881): at dalvik.system.NativeStart.main(Native Method)