今天学习了Socket通信。
主要代码为：
public class MainActivity extends AppCompatActivity implements View.OnClickListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn_accept = (Button) findViewById(R.id.btn_accept); btn_accept.setOnClickListener(this); } @Override public void onClick(View v) { new Thread() { @Override public void run() { try { acceptServer(); } catch (IOException e) { e.printStackTrace(); } } }.start(); } private void acceptServer() throws IOException { //1.创建客户端Socket，指定服务器地址和端口 Socket socket = new Socket("172.16.2.54", 12345); //2.获取输出流，向服务器端发送信息 OutputStream os = socket.getOutputStream();//字节输出流 PrintWriter pw = new PrintWriter(os);//将输出流包装为打印流 //获取客户端的IP地址 InetAddress address = InetAddress.getLocalHost(); String ip = address.getHostAddress(); pw.write("客户端：~" + ip + "~ 接入服务器！！"); pw.flush(); socket.shutdownOutput();//关闭输出流 socket.close(); } }
public class Server { //定义相关的参数,端口,存储Socket连接的集合,ServerSocket对象 //以及线程池 private static final int PORT = 12345; private List<Socket> mList = new ArrayList<Socket>(); private ServerSocket server = null; private ExecutorService myExecutorService = null; public static void main(String[] args) { new Server(); } public Server() { try { server = new ServerSocket(PORT); //创建线程池 myExecutorService = Executors.newCachedThreadPool(); System.out.println("服务端运行中... "); Socket client = null; while(true) { client = server.accept(); mList.add(client); myExecutorService.execute(new Service(client)); } }catch(Exception e){e.printStackTrace();} } class Service implements Runnable { private Socket socket; private BufferedReader in = null; private String msg = ""; public Service(Socket socket) { this.socket = socket; try { in = new BufferedReader(new InputStreamReader(socket.getInputStream())); msg = "用户:" +this.socket.getInetAddress() + "~加入了聊天室" +"当前在线人数:" +mList.size(); this.sendmsg(); }catch(IOException e){e.printStackTrace();} } @Override public void run() { try{ while(true) { if((msg = in.readLine()) != null) { if(msg.equals("bye")) { System.out.println("~~~~~~~~~~~~~"); mList.remove(socket); in.close(); msg = "用户:" + socket.getInetAddress() + "退出:" +"当前在线人数:"+mList.size(); socket.close(); this.sendmsg(); break; }else{ msg = socket.getInetAddress() + " 说: " + msg; this.sendmsg(); } } } }catch(Exception e){e.printStackTrace();} } //为连接上服务端的每个客户端发送信息 public void sendmsg() { System.out.println(msg); int num = mList.size(); for(int index = 0;index < num;index++) { Socket mSocket = mList.get(index); PrintWriter pout = null; try { pout = new PrintWriter(new BufferedWriter( new OutputStreamWriter(mSocket.getOutputStream(),"UTF-8")),true); pout.println(msg); }catch (IOException e) {e.printStackTrace();} } } } }
布局文件：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="小猪简易聊天室" /> <TextView android:id="@+id/txtshow" android:layout_width="match_parent" android:layout_height="wrap_content" /> <EditText android:id="@+id/editsend" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:id="@+id/btnsend" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="发送" /> </LinearLayout>
public class MainActivity extends AppCompatActivity implements Runnable { //定义相关变量,完成初始化 private TextView txtshow; private EditText editsend; private Button btnsend; private static final String HOST = "172.16.2.54"; private static final int PORT = 12345; private Socket socket = null; private BufferedReader in = null; private PrintWriter out = null; private String content = ""; private StringBuilder sb = null; //定义一个handler对象,用来刷新界面 public Handler handler = new Handler() { public void handleMessage(Message msg) { if (msg.what == 0x123) { sb.append(content); txtshow.setText(sb.toString()); } } ; }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sb = new StringBuilder(); txtshow = (TextView) findViewById(R.id.txtshow); editsend = (EditText) findViewById(R.id.editsend); btnsend = (Button) findViewById(R.id.btnsend); //当程序一开始运行的时候就实例化Socket对象,与服务端进行连接,获取输入输出流 //因为4.0以后不能再主线程中进行网络操作,所以需要另外开辟一个线程 new Thread() { public void run() { try { socket = new Socket(HOST, PORT); in = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8")); out = new PrintWriter(new BufferedWriter(new OutputStreamWriter( socket.getOutputStream())), true); } catch (IOException e) { e.printStackTrace(); } } }.start(); //为发送按钮设置点击事件 btnsend.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String msg = editsend.getText().toString(); if (socket.isConnected()) { if (!socket.isOutputShutdown()) { out.println(msg); } } } }); new Thread(MainActivity.this).start(); } //重写run方法,在该方法中输入流的读取 @Override public void run() { try { while (true) { if (socket.isConnected()) { if (!socket.isInputShutdown()) { if ((content = in.readLine()) != null) { content += " "; handler.sendEmptyMessage(0x123); } } } } } catch (Exception e) { e.printStackTrace(); } } }