简易聊天室（Socket实现粗略的Android聊天功能）

客户端代码：

主类：MainActivity.java代码如下
public class MainActivity extends Activity {

private TextView testview=null;
private Button button=null;
private EditText text=null;
protected Handler handler=null;
private OutputStream out=null;
private Socket s = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.testview=(TextView)super.findViewById(R.id.test);
this.button=(Button)super.findViewById(R.id.button);
this.text=(EditText)super.findViewById(R.id.edit);

this.handler=new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what==0x123) {
testview.append("客户端说："+msg.obj.toString()+"\n");
}
}
};
//4.0之后访问网络不能在主程序中进行，要将代码放在线程中，不然会报错。
new Thread(new Runnable() {

@Override
public void run() {
try {
s=new Socket("10.0.2.2", 30000);
new Thread(new ClientThread(s, handler)).start();
out=s.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();

this.button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
try {
out.write((text.getText().toString()+"\n").getBytes("utf-8"));
text.setText("");
}catch (IOException e) {
e.printStackTrace();
}
}
});

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

线程类：ClientThread.java代码如下

public class ClientThread implements Runnable {
private Socket socket=null;
private Handler handler=null;
BufferedReader br=null;
public ClientThread(Socket s,Handler handler) throws IOException {
this.socket=s;
this.handler=handler;
br=new BufferedReader(new InputStreamReader(s.getInputStream()));
}
@Override
public void run() {
try {
String connet=null;
while ((connet=br.readLine())!=null) {
Message message=new Message();
message.what=0x123;
message.obj=connet;
handler.sendMessage(message);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

服务端代码：

线程服务类：ServerTherad.java代码如下
public class ServerTherad implements Runnable {
private Socket s = null;
private BufferedReader buRead = null;
StringBuffer stb=new StringBuffer();
public ServerTherad(Socket s) throws IOException {
this.s = s;
this.buRead = new BufferedReader(new InputStreamReader(
this.s.getInputStream(), "utf-8"));
}

@Override
public void run() {
String connet=null;
try {
while ((connet=readFromClient())!=null) {
//System.out.println("信息\n"+stb.append(connet));
System.out.println("客户端说："+connet);
for (Socket ss:SimpleServer.socketList) {
OutputStream out=ss.getOutputStream();
out.write((connet+"\n").getBytes("utf-8"));
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
private String readFromClient(){
try {
return buRead.readLine();
} catch (Exception e) {
//删除此Socket
SimpleServer.socketList.remove(s);
}
return null;
}

}

服务例子测试：SimpleServer.java代码如下

public class SimpleServer {
public static ArrayList<Socket> socketList=new ArrayList<Socket>();

public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
ServerSocket ss=new ServerSocket(30000);
while (true) {
Socket s=ss.accept();
socketList.add(s);
new Thread(new ServerTherad(s)).start();
}
}

}

注意：测试要先启动服务端运行，然后再启动客户端运行