Android(安卓)开发TCP、UdP客户端

在进行Android开发的过程中，免不了，要开发TCP/UDP通讯的程序，下面这两段代码，分别介绍了TCP/UCP通过的一个实例：

代码一：

private void tcpdata() {

try {

Socket s = new Socket("192.168.0.25", 65500);

// outgoing stream redirect to socket

OutputStream out = s.getOutputStream();

// 注意第二个参数据为true将会自动flush，否则需要需要手动操作out.flush()

PrintWriter output = new PrintWriter(out, true);

output.println("Hello IdeasAndroid! 伪IP为："

+ SIMCardToIP("13512345006"));

InputStream inputStream = s.getInputStream();

DataInputStream input = new DataInputStream(inputStream);

byte[] b = new byte[10000];

int length = input.read(b);

inputReader = new InputStreamReader(inputStream);

String Msg = new String(b, 0, length, "gb2312");

Toast.makeText(TcpTest.this, Msg, 1000).show();

Log.d("Tcp Demo", "message From Server:" + Msg);

s.close();

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

下面的代码是UDP通讯的过程： public String send(String msg) { StringBuilder sb = new StringBuilder(); InetAddress local = null; try { local = InetAddress.getByName("192.168.0.25"); // 本机测试 } catch (UnknownHostException e) { e.printStackTrace(); } try { dSocket = new DatagramSocket(); // 注意此处要先在配置文件里设置权限,否则会抛权限不足的异常 } catch (SocketException e) { e.printStackTrace(); } int msg_len = msg == null ? 0 : msg.length(); DatagramPacket dPacket = new DatagramPacket(msg.getBytes(), msg_len, local, SERVER_PORT); try { dSocket.send(dPacket); } catch (IOException e) { e.printStackTrace(); } try { dSocket.receive(dPacket); sb.append(new String(dPacket.getData())); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } dSocket.close(); return sb.toString(); }

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