Socket Android(九)

导读： 讲解在Android中socket简单快捷的使用方法 涉及到OutputStream、InputStream、Socket、ServerSocket中关于TCP和UDP的使用方法 文末是实际项目中的心得体会

TCP Socket

服务器端

//建立服务端serverSocket
ServerSocket serverSocket = new ServerSocket(8080);
//得到客户连接的socket
Socket socket = serverSocket.accept(); 
//得到输入流
InputStream inputstream = socket.getInputStream();
temp = inputstream.read(buffer);
String s = new String(buffer, 0, temp);
//关闭serverSocket
serverSocket.close();

客户端

Socket socket = new Socket("192.168.1.1", 8080);
OutputStream outputstream = socket.getOutputStream();
byte buffer[] = new byte[4*1024];
outputstream.write(buffer, 0, temp);
outputstream.flush();

UDP Socket

服务器端

DatagramSocket socket = new DatagramSocket(8080);
byte buffer[] = new byte[4*1024];
//创建空的packet
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
socket.receive(packet); //接受
String s = new String(packet.getData(), packet.getOffset(), packet.getLength());//得到数据,packet中不一定从0开始所以选择offset，一直到长度

客户端

DatagramSocket socket = new DatagramSocket(8080);
InetAddress serverAddress = InetAddress.getByName("192.168.1.1");
String s = new String("hello tomorrom");
byte buffer[] = s.getBytes();
DatagramPacket packet = new DatagramPacket(buffer, buffer.length, serverAddress, 8080);
socket.send(packet);

实际项目心得体会

1. socket等内容要在一个额外线程里面，不能和UI一个线程。
2. 其他线程想改变UI需要，使用

handler.post(new Runnable() {

        public void run() {
        // TODO Auto-generated method stub
            Toast.makeText(ClientActivity.this, revString, Toast.LENGTH_SHORT).show();
        }
});