android Socket实现简单聊天小程序
androidSocket实现简单聊天小程序，供大家参考，具体内容如下
服务器端：
packageorg.hwq.echo;
importjava.io.BufferedReader;
importjava.io.IOException;
importjava.io.InputStreamReader;
importjava.io.PrintWriter;
importjava.net.ServerSocket;
importjava.net.Socket;
publicclassTalkServer{
publicstaticvoidmain(String[]args)throwsIOException{
ServerSocketserver=null;
Socketclient=null;
BufferedReaderin=null;
PrintWriterout=null;
try{
server=newServerSocket(4700);
client=server.accept();
out=newPrintWriter(client.getOutputStream());
in=newBufferedReader(newInputStreamReader(client.getInputStream()));
Stringline=in.readLine();
while(!"bye".equals(line)){
System.out.println("client:"+line);
out.println("echo:"+line);
out.flush();
line=in.readLine();
}
}catch(Exceptione){
e.printStackTrace();
if(client!=null)
client.close();
if(server!=null)
server.close();
}
}
}
手机端：
packageorg.hwq.cho;
importjava.io.BufferedReader;
importjava.io.IOException;
importjava.io.InputStreamReader;
importjava.io.PrintWriter;
importjava.net.Socket;
importjava.net.UnknownHostException;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.os.Bundle;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.Toast;
publicclassEchoActivityextendsActivityimplementsOnClickListener{
EditTextshow,msg;
Buttonsend;
Handlerhandler;
Socketclient;
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
handler=newMyHandler();
show=(EditText)findViewById(R.id.show);
msg=(EditText)findViewById(R.id.msg);
send=(Button)findViewById(R.id.send);
send.setOnClickListener(this);
}
@Override
publicvoidonClick(Viewarg0){
Stringmessage=msg.getText().toString();
//System.out.println("msg:"+message);
newEchoThread(EchoActivity.this,message).start();
}
publicclassMyHandlerextendsHandler{
@Override
publicvoidhandleMessage(Messagemsg){
switch(msg.what){
case1:
Toast.makeText(EchoActivity.this,"建立连接失败",0).show();
break;
case2:
Stringmessage=(String)msg.obj;
System.out.println("Handler:"+message);
show.append("\n"+message);
break;
}
}
}
privateclassEchoThreadextendsThread{
privateContextcontext;
privateStringmsg;
EchoThread(Contextcontext,Stringmsg){
this.context=context;
this.msg=msg;
}
publicvoidrun(){
if(client==null){
try{
client=newSocket("192.168.1.102",4700);
}catch(IOExceptione){
Messagemessage=newMessage();
message.what=1;
handler.sendMessage(message);
}
}
System.out.println("建立连接");
try{
BufferedReaderin;
BufferedReaderinput;
PrintWriterout;
in=newBufferedReader(newInputStreamReader(client.getInputStream()));
out=newPrintWriter(client.getOutputStream());
Stringline=msg;
if(!"bye".equals(line)){
System.out.println("line:"+line);
out.println(line);
out.flush();
Stringecho=in.readLine();
System.out.println("server:"+echo);
Messagemessage=newMessage();
message.obj=echo;
message.what=2;
handler.sendMessage(message);
}
}catch(Exceptione){
}
}
}
}
注意几点：
1、添加网络权限
如果没添加，无法使用socket连接网络。
2、在新启线程中不要使用android系统UI界面
在EchoThrad的run()方法里面，有下面代码：
if(client==null){
try{
client=newSocket("192.168.1.102",4700);
}catch(IOExceptione){
Messagemessage=newMessage();
message.what=1;
handler.sendMessage(message);
}
}
这里的handler.sendMessage(message);是发送一个消息给handler,然后handler根据消息弹出一个Toast显示连接失败。如果这里直接使用
Toast.makeText(EchoActivity.this,"建立连接失败",0).show();
会报如下错：
Can'tcreatehandlerinsidethreadthathasnotcalledLooper.prepare()
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。