Android(安卓)Studio实现一个PC和Android端的聊天室

最近想学一下关于Socket 通信相关知识,所以果断来个demo,一个很老套的东西,一个简单的聊天室功能,服务端和android端可以一起聊天,好了不多说了,先上一个结构图

图是画的有点点丑,但是还是能理解的哈,接下来就可以动手了,反正是做个demo不需要想太多,我们打开AndroidStudio新建项目SocketDemo,工程创建完成后我们在项目下面创建一个javalib的module如下图

名字随便起,包名无所谓,我这里新建了一个Test 的类包含main方法,类如下

package com.example;public class Test {public static void main(String[] args) {// TODO Auto-generated method stub}}

接下来我们把服务端的界面创建起来,这里用到了java图形开发的东西,我是一个做android的也不是很熟悉,百度了半天哈哈先上一个完成图吧再来代码这样直观一点好解释,

完成图如下

服务端的界面就是这么简单,有了这个图下面代码就很容易就看懂了,

public class Chatroom extends JFrame implements  ActionListener {    private JLabel clientLabel;//客户列表标签    private JList clientList;//客户列表    private JLabel historyLabel;//聊天记录标签    private JScrollPane jScrollPane;//嵌套在聊天记录外面的一个容器,让里面的内容可以滚动    private JTextArea historyContentLabel;//聊天记录显示的控件    private JTextField messageText;//服务端输入框    private JButton sendButton;//服务端发送的按钮     public Chatroom() {        clientLabel = new JLabel("客户列表");        clientLabel.setBounds(0, 0, 100, 30);        clientList = new JList<>();        clientList.setBounds(0, 30, 100, 270);        historyLabel = new JLabel("聊天记录");        historyLabel.setBounds(100, 0, 500, 30);        historyContentLabel = new JTextArea();        jScrollPane=new JScrollPane(historyContentLabel);        jScrollPane.setBounds(100, 30, 500, 230);        //分别设置水平和垂直滚动条自动出现        jScrollPane.setHorizontalScrollBarPolicy(                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);        jScrollPane.setVerticalScrollBarPolicy(                JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);        messageText = new JTextField();        messageText.setBounds(100, 270, 440, 30);        sendButton = new JButton("发送");        sendButton.setBounds(540, 270, 60, 30);//-----------代码分割线----------------        sendButton.addActionListener(this);        this.setLayout(null);        add(clientLabel);        add(clientList);        add(historyLabel);        add(jScrollPane);        add(messageText);        add(sendButton);        //设置窗体        this.setTitle("客服中心");//窗体标签        this.setSize(600, 330);//窗体大小        this.setLocationRelativeTo(null);//在屏幕中间显示(居中显示)        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//退出关闭JFrame        this.setVisible(true);//显示窗体        this.setResizable(false);    }       @Override    public void actionPerformed(ActionEvent e) {        // TODO Auto-generated method stub        if (e.getSource() == sendButton) {                  }    }

首先是声明一些控件,这个不用说很好理解,代码分割线下面的是设置事件回调,我们只需要给button设置事件回调就行,在下面一行是设置这个Jframe 的Layout,我这里设置为null 的意思就是不需要任何布局方式,我们利用位置来自己定位,再往下的一系列add不用说就是把声明的控件添加到当前的JFrame里面,再往下就是堆窗口的设置了,这些都不是重点,略过,到这里我们服务端的界面就完成了.

接下来我们要实现的就是服务线程的代码了,服务端最核心的一个东西就是ServerSocket,我们通过serversocket循环监听客户端的链接,并且把已经链接的客户端保存起来就可以了,就是这么简单,先上代码

public class Server extends Thread {       boolean started = false;//标记服务是否已经启动    ServerSocket ss = null;       @Override    public void run() {        // TODO Auto-generated method stub        super.run();        try {            ss = new ServerSocket(8888);            started = true;            System.out.println("server is started");        } catch (BindException e) {            System.out.println("port is not available....");            System.out.println("please restart");            System.exit(0);        } catch (IOException e) {            e.printStackTrace();        }        try {            while (started) {                           }        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                ss.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

上面的就是server线程的一个整体的框架,开启的是本地8888端口,后面我们慢慢加进去东西就行了,isStarted这个是循环的标记位,我们在前面的Chatroom类的构造最下面加入启动server线程的代码跑起来看看

通过AS的控制台我们看到这个服务已经启动起来了,接下来我们就要监听客户端的到来了 ,这里我们定义一个Client线程类,作为服务端对应的客户,看代码

public class Client implements Runnable{private Socket s;private DataInputStream dis = null;private DataOutputStream dos = null;private boolean bConnected = false;public Socket getSocket() {return s;}public Client(Socket s) {this.s=s;try {dis = new DataInputStream(s.getInputStream());dos = new DataOutputStream(s.getOutputStream());bConnected = true;} catch (IOException e) {e.printStackTrace();}}public void send(String str) {try {dos.writeUTF(str);} catch (IOException e) {}}public void run() {try {while (bConnected) {}} catch (EOFException e) {System.out.println("Client closed!");} catch (IOException e) {e.printStackTrace();} finally {try {if (dis != null)dis.close();if (dos != null)dos.close();if (s != null) {s.close();}} catch (IOException e1) {e1.printStackTrace();}}}@Overridepublic boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;Client client = (Client) o;return s.equals(client.s);}@Overridepublic int hashCode() {return s.hashCode();}@Overridepublic String toString() {// TODO Auto-generated method stubreturn s.toString();}}

客户端类最重要的一个东西就是Socket类,在这个Client类里面加了get方法,toString,hash以及equals都是围绕这个socket来的,因为它是这个类的大佬,client类的整体框架就是这样了,另外对于消息的接受我们放在while循环里面,对于消息的发送我们调用socket 的writeUTF方法实现,客户端的东西弄完了,我们现在回到server类里面我们维护一个客户端的列表

 List clients = new ArrayList();

介于多个线程会访问这个列表,并且ArrayList不是线程安全的,所以我们在Server类里面创建几个添加和删除的方法

  public synchronized void addClient(Client client) {        clients.add(client);    }    public synchronized void removeClient(Client client) {        clients.remove(client);    }

然后是server类的while方法加入监听客户端的代码

 Socket s = ss.accept();                Client c = new Client(s, Server.this);                System.out.println("a client connected!");                new Thread(c).start();                addClient(c);

到这里其实我们应该就能看到效果了只是现在我们android代码没有写,那我们简单的写一下Android的代码

先上布局文件

<?xml version="1.0" encoding="utf-8"?>

界面就是和QQ那样上面是聊天的信息下面是一个输入框和一个发送按钮

这里界面我们先不管,先把Android端的client线程写好

public class SocketThread extends Thread {    private Socket socket;    private boolean isConnected = false;    private DataInputStream dataInputStream;    private DataOutputStream dataOutputStream;    public SocketThread() {          }    public void disconnect() {        try {            dataInputStream.close();            dataOutputStream.close();            socket.close();        } catch (IOException e) {            e.printStackTrace();        }    }    @Override    public void run() {        super.run();        try {            // 创建一个Socket对象，并指定服务端的IP及端口号            socket = new Socket("10.137.213.28", 8888);            dataInputStream = new DataInputStream(socket.getInputStream());            dataOutputStream = new DataOutputStream(socket.getOutputStream());            System.out.println("~~~~~~~~连接成功~~~~~~~~!");            isConnected = true;        } catch (UnknownHostException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        while (isConnected) {            try {                while (isConnected) {                    String str = dataInputStream.readUTF();                    if (str != null) {                                          }                }            } catch (EOFException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            } finally {                try {                    if (dataInputStream != null)                        dataInputStream.close();                    if (dataOutputStream != null)                        dataOutputStream.close();                    if (socket != null) {                        socket.close();                    }                } catch (IOException e1) {                    e1.printStackTrace();                }            }        }    }    public void sendMessage(String message) {        try {            dataOutputStream.writeUTF(message);        } catch (IOException e) {            e.printStackTrace();        }    }}

这里我的两个手机和电脑都是在同一个局域网内的,电脑用的是8888端口,代码先就这样,我们现在先把服务端代码跑起来,然后利用两个手机跑一下APP,看下控制台的输出

到这里为止,我们看到我们的两个手机都能成功连接到服务端了对吧?其实已经成功了一大半了,接下来就是实现消息的接受和发送,我们来修改一下Server类,因为Server类要和服务端界面交互,这里我采用回调的方式通知服务界面客户端的变化,消息的变化,看下Server类加入接口后的代码

public class Server extends Thread {    public interface OnServiceListener {        void onClientChanged(List clients);        void onNewMessage(String message, Client client);    }    private OnServiceListener listener;    public void setOnServiceListener(OnServiceListener listener) {        this.listener = listener;    }    boolean started = false;    ServerSocket ss = null;    List clients = new ArrayList();    @Override    public void run() {        // TODO Auto-generated method stub        super.run();        try {            ss = new ServerSocket(8888);            started = true;            System.out.println("server is started");        } catch (BindException e) {            System.out.println("port is not available....");            System.out.println("please restart");            System.exit(0);        } catch (IOException e) {            e.printStackTrace();        }        try {            while (started) {                Socket s = ss.accept();                Client c = new Client(s, Server.this);                System.out.println("a client connected!");                new Thread(c).start();                addClient(c);            }        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                ss.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }    public synchronized void newMessage(String msg, Client client) {        if (listener != null) {            listener.onNewMessage(msg, client);        }    }    public synchronized void addClient(Client client) {        clients.add(client);        if (listener != null) {            listener.onClientChanged(clients);        }    }    public synchronized void removeClient(Client client) {        clients.remove(client);        if (listener != null) {            listener.onClientChanged(clients);        }    }}

然后我们在Chatroom类里面进行回调的注册

看下修改后的代码

public class Chatroom extends JFrame implements Server.OnServiceListener, ActionListener {    private JLabel clientLabel;    private JList clientList;    private JLabel historyLabel;    private JScrollPane jScrollPane;    private JTextArea historyContentLabel;    private JTextField messageText;    private JButton sendButton;    private Server server;    private StringBuffer buffers;    public Chatroom() {        buffers = new StringBuffer();        clientLabel = new JLabel("客户列表");        clientLabel.setBounds(0, 0, 100, 30);        clientList = new JList<>();        clientList.setBounds(0, 30, 100, 270);        historyLabel = new JLabel("聊天记录");        historyLabel.setBounds(100, 0, 500, 30);        historyContentLabel = new JTextArea();        jScrollPane=new JScrollPane(historyContentLabel);        jScrollPane.setBounds(100, 30, 500, 230);        //分别设置水平和垂直滚动条自动出现        jScrollPane.setHorizontalScrollBarPolicy(                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);        jScrollPane.setVerticalScrollBarPolicy(                JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);        messageText = new JTextField();        messageText.setBounds(100, 270, 440, 30);        sendButton = new JButton("发送");        sendButton.setBounds(540, 270, 60, 30);        sendButton.addActionListener(this);        this.setLayout(null);        add(clientLabel);        add(clientList);        add(historyLabel);        add(jScrollPane);        add(messageText);        add(sendButton);        //设置窗体        this.setTitle("聊天室");//窗体标签        this.setSize(600, 330);//窗体大小        this.setLocationRelativeTo(null);//在屏幕中间显示(居中显示)        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//退出关闭JFrame        this.setVisible(true);//显示窗体        this.setResizable(false);        server = new Server();        server.setOnServiceListener(this);        server.start();    }    @Override    public void onClientChanged(List clients) {        // TODO Auto-generated method stub        clientList.setListData(clients.toArray());    }    @Override    public void onNewMessage(String message, Client client) {        // TODO Auto-generated method stub        buffers.append(client.getSocket().getInetAddress().toString()+"\n");        buffers.append(message+"\n");        historyContentLabel.setText(buffers.toString());    }    @Override    public void actionPerformed(ActionEvent e) {        // TODO Auto-generated method stub        if (e.getSource() == sendButton) {            Client client = (Client) clientList.getSelectedValue();            client.send(messageText.getText().toString());            buffers.append("服务器"+"\n");            buffers.append(messageText.getText().toString()+"\n");        }    }}

我们再看看服务端Client修改的代码

public class Client implements Runnable{private Socket s;private DataInputStream dis = null;private DataOutputStream dos = null;private boolean bConnected = false;private Server server;public Socket getSocket() {return s;}public Client(Socket s, Server ser) {this.s=s;this.server = ser;try {dis = new DataInputStream(s.getInputStream());dos = new DataOutputStream(s.getOutputStream());bConnected = true;} catch (IOException e) {e.printStackTrace();}}public void send(String str) {try {dos.writeUTF(str);} catch (IOException e) {server.removeClient(this);}}public void run() {try {while (bConnected) {String str = dis.readUTF();server.newMessage(str,this);}} catch (EOFException e) {System.out.println("Client closed!");} catch (IOException e) {e.printStackTrace();} finally {try {if (dis != null)dis.close();if (dos != null)dos.close();if (s != null) {server.removeClient(this);s.close();}} catch (IOException e1) {e1.printStackTrace();}}}@Overridepublic boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;Client client = (Client) o;return s.equals(client.s);}@Overridepublic int hashCode() {return s.hashCode();}@Overridepublic String toString() {// TODO Auto-generated method stubreturn s.toString();}}

我们先看看Client代码,这里我把Server传了进来,在Client接收到消息和异常退出的时候我们通过Server实例来调用对应的Server里面的方法,再回看Server里面,我们的消息接受和Client退出已经新的Client 的到来我们都通过回调的方式通知服务端的界面ChatRoom类,到这里服务端几个部分的通信基本是完成了,接下来我们完善android端的代码主要是实现消息的发送和接受,这里我们同样以回调的方式来实现,看下android端Client 的实现

public class SocketThread extends Thread {    public interface OnClientListener {        void onNewMessage(String msg);    }    private OnClientListener onClientListener;    public void setOnClientListener(OnClientListener onClientListener) {        this.onClientListener = onClientListener;    }    private Socket socket;    private boolean isConnected = false;    private DataInputStream dataInputStream;    private DataOutputStream dataOutputStream;    public SocketThread(OnClientListener onClientListener) {        this.onClientListener = onClientListener;    }    public void disconnect() {        try {            dataInputStream.close();            dataOutputStream.close();            socket.close();        } catch (IOException e) {            e.printStackTrace();        }    }    @Override    public void run() {        super.run();        try {            // 创建一个Socket对象，并指定服务端的IP及端口号            socket = new Socket("10.137.213.28", 8888);            dataInputStream = new DataInputStream(socket.getInputStream());            dataOutputStream = new DataOutputStream(socket.getOutputStream());            System.out.println("~~~~~~~~连接成功~~~~~~~~!");            isConnected = true;        } catch (UnknownHostException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        while (isConnected) {            try {                while (isConnected) {                    String str = dataInputStream.readUTF();                    if (str != null) {                        if (onClientListener != null) {                            onClientListener.onNewMessage(str);                        }                    }                }            } catch (EOFException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            } finally {                try {                    if (dataInputStream != null)                        dataInputStream.close();                    if (dataOutputStream != null)                        dataOutputStream.close();                    if (socket != null) {                        socket.close();                    }                } catch (IOException e1) {                    e1.printStackTrace();                }            }        }    }    public void sendMessage(String message) {        try {            dataOutputStream.writeUTF(message);        } catch (IOException e) {            e.printStackTrace();        }    }}

看下MainActivity 的实现

public class MainActivity extends AppCompatActivity implements SocketThread.OnClientListener{    private SocketThread socketThread;    private StringBuilder stringBuilder=new StringBuilder();    private TextView serviceTv;    private EditText contentEt;    private Button sendBtn;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        serviceTv = (TextView) findViewById(R.id.tv_service);        contentEt = (EditText) findViewById(R.id.et_content);        sendBtn = (Button) findViewById(R.id.btn_send);        socketThread = new SocketThread(this);        socketThread.start();        sendBtn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                stringBuilder.append("我:\n");                stringBuilder.append(contentEt.getText().toString());                stringBuilder.append("\n");                serviceTv.setText(stringBuilder.toString());                socketThread.sendMessage(contentEt.getText().toString());            }        });    }    @Override    protected void onDestroy() {        super.onDestroy();        socketThread.disconnect();    }    @Override    public void onNewMessage(String msg) {        stringBuilder.append("服务器:");        stringBuilder.append("\n");        stringBuilder.append(msg);        stringBuilder.append("\n");        runOnUiThread(new Runnable() {            @Override            public void run() {                serviceTv.setText(stringBuilder.toString());            }        });    }}

通过一个StringBuffer来达到消息记录的功能,代码就是这么简单,我们看下跑起来的效果

到这里我们实现了手机向服务器发送信息,服务器可以向指定的手机发送信息,这里我在Chatroom类里面实现的是通过点击选中左边的客户来进行消息的发送,我们可以看到基本的样子就是这样了,接下来要实现的就是一个手机发送的信息在另外一个手机能看到,这就需要服务器来转发消息了,这里需要一个小小的协议就是客户端要知道消息是来自谁的
所以我们在服务器转发或者发送信息的时候前面加上谁发送的,这里我们用一个$符号隔开,在android端收到信息的时候拆开就行了,我们修改一下Server类接收到消息的方法,然后新增一个发送消息的方法给Chatroom调用

public synchronized void snedMessage(String msg) {        for (Client client1 : clients) {            client1.send(msg);        }    }    public synchronized void newMessage(String msg, Client client) {        if (listener != null) {            listener.onNewMessage(msg, client);            for (Client client1 : clients) {                if (!client1.equals(client)) {                    client1.send(client1.getSocket().getInetAddress() + "#" + msg);                }            }        }    }

ChatRoom类里面按钮的点击事件修改为

 @Override    public void actionPerformed(ActionEvent e) {        // TODO Auto-generated method stub        if (e.getSource() == sendButton) {            server.snedMessage("服务器#"+messageText.getText().toString());            buffers.append("服务器"+"\n");            buffers.append(messageText.getText().toString()+"\n");            historyContentLabel.setText(buffers.toString());        }    }

android端接受到消息的处理

 @Override    public void onNewMessage(String msg) {        Log.i("收到的信息i",msg);        String[] s = msg.split("#");        stringBuilder.append(s[0]);        stringBuilder.append("\n");        stringBuilder.append(s[1]);        stringBuilder.append("\n");        runOnUiThread(new Runnable() {            @Override            public void run() {                serviceTv.setText(stringBuilder.toString());            }        });    }

看看实现后的效果图

到这里就大功告成了,通过Server类的转发我们后面还可以进行点对点通信,通过自定义协议我们可以完成各种各样的业务,自己动手实现一个及时通讯的框架就可以这样完成了,是不是很简单,代码我上传到github

https://github.com/wlj644920158/SocketDemo

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