我在Android开发上,想要连接socket。报错NetworkOnMainThread这么...
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错误就是你的 网络操作在主线程中；
package com.Android.tcpchat;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
//import java.text.SimpleDateFormat;
//import java.util.Date;
import java.util.Vector;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
//--------Socket服务端----------------------
TextView textView1;
ServerSocket serverSocket;
Handler sHandler;
Vector<Socket> vector; // 管理客户
//--------Socket客户端----------------------
TextView textView2;
EditText editText1;
Button button1;
Button button2;
Socket clientSocket;
Handler cHandler;
//--------Socket服务端----------------------
Handler timer_handler;
Runnable timer_runnable;
void initTimer() // 初始定时器
{
timer_handler=new Handler();
timer_runnable=new Runnable()
{
public void run()
{ //
timer_handler.postDelayed(this,1000); // this指runnable自已,再次启动
}
};
}
void startTimer() // 启动定时器
{
timer_handler.post(timer_runnable); // 立即执行runnable对象
}
void closeTimer() // 关闭定时器
{
timer_handler.removeCallbacks(timer_runnable);
}
//--------------------------------------------
void dispClients()
{ //显示所有客户
int n=vector.size();
String ss="\n"+n+" clients:\n";
for (int i=0;i<vector.size();i++)
{
Socket sk=vector.get(i);
String ip=sk.getInetAddress().toString();
String port=""+sk.getPort();
ss+=""+ip+","+port+"\n";
}
textView1.setText(ss);
}
void writeSocket(Socket sk,String s)
{ // 向客户端Socket发字符串
DataOutputStream outf;
try
{
outf=new DataOutputStream(sk.getOutputStream());
if (!sk.isClosed())
outf.writeUTF(s);
}
catch(Exception e)
{
}
}
void writeSock(final Socket sk,final String s)
{ // 子线程中向客户端Socket发字符串
new Thread(new Runnable()
{
@Override
public void run()
{
writeSocket(sk,s);
}
}).start();
}
void sendAll(final String s)
{ // 向所有管理中的客户Socket发串
for (int i=0;i<vector.size();i++)
{
Socket sk=vector.get(i);
writeSock(sk,s);
}
}
void readSocket(Socket sk)
{ // 服务端读Socket
DataInputStream inf;
try
{
inf=new DataInputStream(sk.getInputStream());
while(sk.isConnected() && !sk.isClosed())
{
String s=inf.readUTF();
if (s.length()>0)
{ // 读到字符串后，通知主程序处理
String ip=sk.getInetAddress().toString();
String port=""+sk.getPort();
s=ip+","+port+":"+s+"\n";
Message msg=sHandler.obtainMessage(1,s);
sHandler.sendMessage(msg);
}
}
}
catch(Exception e)
{
}
}
void readSock(final Socket sk)
{ // 子线程中读
new Thread(new Runnable()
{
@Override
public void run()
{
readSocket(sk);
}
}).start();
}
void listen(ServerSocket ssk) // 接受多个客户端连接请求
{
while (!ssk.isClosed())
try
{
Socket sk=ssk.accept();
vector.add(sk); // 有客户连接
readSock(sk);
// 通知刷新客户列表
Message msg=sHandler.obtainMessage(0,"");
sHandler.sendMessage(msg);
}
catch(Exception e)
{
}
}
void listen() // 线程接受多个客户端连接请求
{
new Thread(new Runnable()
{
@Override
public void run()
{
listen(serverSocket);
}
}).start();
}
//------------Socket客户端----------------------
Socket newSocket(String ip,int port)
{
Socket sk=null;
try
{
sk=new Socket(ip,port);
}
catch(Exception e)
{
}
return(sk);
}
void clientRead(Socket sk)
{ // 客户端读Socket
DataInputStream inf;
try
{
inf=new DataInputStream(sk.getInputStream());
while(sk.isConnected() && !sk.isClosed())
{
String s=inf.readUTF();
if (s.length()>0)
{
Message msg=cHandler.obtainMessage(2,s);
cHandler.sendMessage(msg);
}
}
}
catch(Exception e)
{
}
}
void clientRead(final String ip,final int port)
{ // 子线程中客户端读Socket
new Thread(new Runnable()
{
@Override
public void run()
{
Socket sk=newSocket(ip,port);
clientSocket=sk;
if (sk!=null)
clientRead(sk);
}
}).start();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//---------------Socket服务端---------------------------------
textView1=(TextView)findViewById(R.id.textView1);
textView1.setText("");
//-----服务端的消息处理器sHandler
sHandler=new Handler()
{
@Override
public void handleMessage(Message msg)
{
switch (msg.what)
{
case 0:
dispClients(); // list clients
break;
case 1:
String s=msg.obj.toString();
sendAll(s);
break;
}
}
};
vector=new Vector<Socket>();
try
{
serverSocket=new ServerSocket(9003);
listen();
}
catch(Exception e)
{
}
//---------Socket客户端----------------------------------
cHandler=new Handler()
{ // 客户端消息处理器
@Override
public void handleMessage(Message msg)
{
String s=msg.obj.toString();
textView2.append(s);
}
};
clientRead("127.0.0.1",9003);
clientRead("10.0.2.15",9003);
textView2=(TextView)findViewById(R.id.textView2);
textView2.setText("");
editText1=(EditText)findViewById(R.id.editText1);
button1=(Button)findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
try
{
String s=editText1.getText().toString();
writeSock(clientSocket,s);
}
catch(Exception e)
{
}
} //public
});
button2=(Button)findViewById(R.id.button2);
button2.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
try
{
String s="中华人民共和国";
writeSock(clientSocket,s);
}
catch(Exception e)
{
}
} //public
});
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{ // 按返回键的退出处理
if (keyCode == KeyEvent.KEYCODE_BACK )
{
try
{ // 防止出现端口已绑定的错误
serverSocket.close();
finish();
System.exit(0);
}
catch(Exception e)
{
}
}
return(false);
}
}
