android之socket編程實例

注意點：註冊訪問的網絡權限；android中UI線程不能有訪問網絡的操作，否則會報android.os.NetworkOnMainThreadException的異常

<uses-permission
    android:name="android.permission.INTERNET"/>

Android開發聯盟③ 433233634

實例一

客戶端

package com.android.xiong.simplesocket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {
    Socket socket = null;
    String buffer = "";
    TextView txt1;
    Button send;
    EditText ed1;
    String geted1;
    public Handler myHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == 0x11) {
                Bundle bundle = msg.getData();
                txt1.append("server:"+bundle.getString("msg")+"\n");
            }
        }

    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txt1 = (TextView) findViewById(R.id.txt1);
        send = (Button) findViewById(R.id.send);
        ed1 = (EditText) findViewById(R.id.ed1);
        send.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                geted1 = ed1.getText().toString();
                txt1.append("client:"+geted1+"\n");
                //啓動線程 向服務器發送和接收信息
                new MyThread(geted1).start();
            }
        });

    }

    class MyThread extends Thread {

        public String txt1;

        public MyThread(String str) {
            txt1 = str;
        }

        @Override
        public void run() {
            //定義消息
            Message msg = new Message();
            msg.what = 0x11;
            Bundle bundle = new Bundle();
            bundle.clear();
            try {
                //連接服務器 並設置連接超時爲5秒
                socket = new Socket();
                socket.connect(new InetSocketAddress("1.1.9.30", 30000), 5000);
                //獲取輸入輸出流
                OutputStream ou = socket.getOutputStream();
                BufferedReader bff = new BufferedReader(new InputStreamReader(
                        socket.getInputStream()));
                //讀取發來服務器信息
                String line = null;
                buffer="";
                while ((line = bff.readLine()) != null) {
                    buffer = line + buffer;
                }

                //向服務器發送信息
                ou.write("android 客戶端".getBytes("gbk"));
                ou.flush();
                bundle.putString("msg", buffer.toString());
                msg.setData(bundle);
                //發送消息 修改UI線程中的組件
                myHandler.sendMessage(msg);
                //關閉各種輸入輸出流
                bff.close();
                ou.close();
                socket.close();
            } catch (SocketTimeoutException aa) {
                //連接超時 在UI界面顯示消息
                bundle.putString("msg", "服務器連接失敗！請檢查網絡是否打開");
                msg.setData(bundle);
                //發送消息 修改UI線程中的組件
                myHandler.sendMessage(msg);
            } 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;
    }

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/ed1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="給服務器發送信息"/>
    <Button
        android:id="@+id/send"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/ed1"
        android:text="發送"/>
    <TextView
        android:id="@+id/txt1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/send"/>




</RelativeLayout>

服務端

package com.android.net;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class AndroidService {


    public static void main(String[] args) throws IOException {
        ServerSocket serivce = new ServerSocket(30000);
        while (true) {
            //等待客戶端連接
            Socket socket = serivce.accept();
            new Thread(new AndroidRunable(socket)).start();
        }
    }

}

package com.android.net;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;

public class AndroidRunable implements Runnable {

    Socket socket = null;

    public AndroidRunable(Socket socket) {
        this.socket = socket;
    }

    @Override
    public void run() {
        // 向android客戶端輸出hello worild
        String line = null;
        InputStream input;
        OutputStream output;
        String str = "hello world!";
        try {
            //向客戶端發送信息
            output = socket.getOutputStream();
            input = socket.getInputStream();
            BufferedReader bff = new BufferedReader(
                    new InputStreamReader(input));
            output.write(str.getBytes("gbk"));
            output.flush();
            //半關閉socket
            socket.shutdownOutput();
            //獲取客戶端的信息
            while ((line = bff.readLine()) != null) {
                System.out.print(line);
            }
            //關閉輸入輸出流
            output.close();
            bff.close();
            input.close();
            socket.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

實例二

客戶端

package com.android.xiong.sockettwotest;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

    // 定義界面上的兩個文本框
    EditText input;
    TextView show;
    // 定義界面上的一個按鈕
    Button send;
    Handler handler;
    // 定義與服務器通信的子線程
    ClientThread clientThread;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        input = (EditText) findViewById(R.id.input);
        show = (TextView) findViewById(R.id.show);
        send = (Button) findViewById(R.id.send);
        handler = new Handler() {

            @Override
            public void handleMessage(Message msg) {
                // 如果消息來自子線程
                if (msg.what == 0x123) {
                    // 將讀取的內容追加顯示在文本框中
                    show.append("\n" + msg.obj.toString());
                }
            }
        };
        clientThread = new ClientThread(handler);
        // 客戶端啓動ClientThread線程創建網絡連接、讀取來自服務器的數據
        new Thread(clientThread).start();
        send.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                try {
                    // 當用戶按下按鈕之後，將用戶輸入的數據封裝成Message
                    // 然後發送給子線程Handler
                    Message msg = new Message();
                    msg.what = 0x345;
                    msg.obj = input.getText().toString();
                    clientThread.revHandler.sendMessage(msg);
                    input.setText("");

                } catch (Exception e) {

                }
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

package com.android.xiong.sockettwotest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;

import android.os.Handler;
import android.os.Looper;
import android.os.Message;

public class ClientThread implements Runnable {
    private Socket s;
    // 定義向UI線程發送消息的Handler對象
    Handler handler;
    // 定義接收UI線程的Handler對象
    Handler revHandler;
    // 該線程處理Socket所對用的輸入輸出流
    BufferedReader br = null;
    OutputStream os = null;

    public ClientThread(Handler handler) {
        this.handler = handler;
    }

    @Override
    public void run() {
        s = new Socket();
        try {
            s.connect(new InetSocketAddress("1.1.9.30", 3000), 5000);
            br = new BufferedReader(new InputStreamReader(s.getInputStream()));
            os = s.getOutputStream();
            // 啓動一條子線程來讀取服務器相應的數據
            new Thread() {

                @Override
                public void run() {
                    String content = null;
                    // 不斷的讀取Socket輸入流的內容
                    try {
                        while ((content = br.readLine()) != null) {
                            // 每當讀取到來自服務器的數據之後，發送的消息通知程序
                            // 界面顯示該數據
                            Message msg = new Message();
                            msg.what = 0x123;
                            msg.obj = content;
                            handler.sendMessage(msg);
                        }
                    } catch (IOException io) {
                        io.printStackTrace();
                    }
                }

            }.start();
            // 爲當前線程初始化Looper
            Looper.prepare();
            // 創建revHandler對象
            revHandler = new Handler() {

                @Override
                public void handleMessage(Message msg) {
                    // 接收到UI線程的中用戶輸入的數據
                    if (msg.what == 0x345) {
                        // 將用戶在文本框輸入的內容寫入網絡
                        try {
                            os.write((msg.obj.toString() + "\r\n")
                                    .getBytes("gbk"));
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }

            };
            // 啓動Looper
            Looper.loop();

        } catch (SocketTimeoutException e) {
            Message msg = new Message();
            msg.what = 0x123;
            msg.obj = "網絡連接超時！";
            handler.sendMessage(msg);
        } catch (IOException io) {
            io.printStackTrace();
        }

    }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/input" />
    <Button
        android:id="@+id/send"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/send"
        android:layout_below="@id/input"/>
    <TextView
        android:id="@+id/show"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/send"/>

</RelativeLayout>

服務端

package com.android.net;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class MyService {

    // 定義保存所有的Socket
    public static List<Socket> socketList = new ArrayList<Socket>();

    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(3000);
        while(true){
            Socket s=server.accept();
            socketList.add(s);
            //每當客戶端連接之後啓動一條ServerThread線程爲該客戶端服務
            new Thread(new ServiceThreada(s)).start();

        }
    }

}

package com.android.net;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;

public class ServiceThreada implements Runnable {

    // 定義當前線程處理的Socket
    Socket s = null;
    // 該線程所處理的Socket所對應的輸入流
    BufferedReader br = null;

    public ServiceThreada(Socket s) {
        this.s = s;
        try {
            br = new BufferedReader(new InputStreamReader(s.getInputStream()));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void run() {

        String content = null;
        //採用循環不斷的從Socket中讀取客戶端發送過來的數據
        while((content=readFromClient())!=null){
            //遍歷socketList中的每個Socket
            //將讀取到的內容每個向Socket發送一次
            for(Socket s:MyService.socketList){
                OutputStream os;
                try {
                    os = s.getOutputStream();
                    os.write((content+"\n").getBytes("gbk"));
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }
        }

    }

    // 定義讀取客戶端的信息
    public String readFromClient() {
        try {
            return br.readLine();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

}