socket客户端程序出错

Question

package com.secion9.clienttest;import android.os.Bundle;
import android.app.Activity;
import android.widget.*;
import java.net.Socket;
import java.io.IOException;
import java.io.OutputStream;
import android.view.View;
import android.view.View.OnClickListener;
public class ClientActivity extends Activity { Button btSend;
EditText etMsg;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_client);
        btSend=(Button)this.findViewById(R.id.button1);
        etMsg=(EditText)this.findViewById(R.id.EditText1);
     btSend.setOnClickListener(
     new OnClickListener(){
     public void onClick(View v)
     {
        try
        {
        
        Socket socket=new Socket("127.0.0.1",5050);
                  OutputStream outputStream=socket.getOutputStream();
                  byte[] buffer=etMsg.getText().toString().getBytes();
                  outputStream.write(buffer);
         outputStream.flush();
    
        }
        catch(IOException e)
        {
         e.printStackTrace();
        }
        }
         });
    }
}log打印如下：
09-02 08:24:31.189: E/Trace(627): error opening trace file: No such file or directory (2)
09-02 08:24:32.259: D/gralloc_goldfish(627): Emulator without GPU emulation detected.
09-02 08:24:32.598: I/Choreographer(627): Skipped 40 frames!  The application may be doing too much work on its main thread.
09-02 08:25:04.471: D/AndroidRuntime(627): Shutting down VM
09-02 08:25:04.471: W/dalvikvm(627): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
09-02 08:25:04.539: E/AndroidRuntime(627): FATAL EXCEPTION: main
09-02 08:25:04.539: E/AndroidRuntime(627): android.os.NetworkOnMainThreadException
09-02 08:25:04.539: E/AndroidRuntime(627):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
09-02 08:25:04.539: E/AndroidRuntime(627):  at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
09-02 08:25:04.539: E/AndroidRuntime(627):  at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
09-02 08:25:04.539: E/AndroidRuntime(627):  at libcore.io.IoBridge.connect(IoBridge.java:112)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.net.Socket.startupSocket(Socket.java:566)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.net.Socket.tryAllAddresses(Socket.java:127)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.net.Socket.<init>(Socket.java:177)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.net.Socket.<init>(Socket.java:149)
09-02 08:25:04.539: E/AndroidRuntime(627):  at com.secion9.clienttest.ClientActivity$1.onClick(ClientActivity.java:31)
09-02 08:25:04.539: E/AndroidRuntime(627):  at android.view.View.performClick(View.java:4084)
09-02 08:25:04.539: E/AndroidRuntime(627):  at android.view.View$PerformClick.run(View.java:16966)
09-02 08:25:04.539: E/AndroidRuntime(627):  at android.os.Handler.handleCallback(Handler.java:615)
09-02 08:25:04.539: E/AndroidRuntime(627):  at android.os.Handler.dispatchMessage(Handler.java:92)
09-02 08:25:04.539: E/AndroidRuntime(627):  at android.os.Looper.loop(Looper.java:137)
09-02 08:25:04.539: E/AndroidRuntime(627):  at android.app.ActivityThread.main(ActivityThread.java:4745)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.lang.reflect.Method.invokeNative(Native Method)
09-02 08:25:04.539: E/AndroidRuntime(627):  at java.lang.reflect.Method.invoke(Method.java:511)
09-02 08:25:04.539: E/AndroidRuntime(627):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
09-02 08:25:04.539: E/AndroidRuntime(627):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-02 08:25:04.539: E/AndroidRuntime(627):  at dalvik.system.NativeStart.main(Native Method)
09-02 08:25:07.079: I/Process(627): Sending signal. PID: 627 SIG: 9
程序运行后点击发送按钮就弹出对话框提示说程序已经退出；
大神们帮帮忙！谢了！

Answer 1

主线程中不允许有网络操作，解决办法：将Socket的代码放入Thread执行。
new Thread(){
   @Override
   public void run()
   {
   try
 { Socket socket=new Socket("127.0.0.1",5050);
 OutputStream outputStream=socket.getOutputStream();
 byte[] buffer=etMsg.getText().toString().getBytes();
 outputStream.write(buffer);
 outputStream.flush();
   
}
 catch(IOException e)
 {
 e.printStackTrace();
 }  
  }
}.start();具体说明请参考：
http://blog.csdn.net/aminfo/article/details/7903112