Socket客户端源码

Android TCP/Socket通信代码：

网络权限：

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

布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <EditText
        android:hint="Ip"
        android:layout_width="350dp"
        android:layout_height="wrap_content"
        android:id="@+id/EdtTcpSerIp"/>
    <EditText
        android:hint="Port"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:id="@+id/EdtTcpPort"/>

    <Button
        android:onClick="onConnectClick"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Connect"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="接收到的数据"/>

    <TextView
        android:scrollbars="vertical"
        android:background="#fff"
        android:text=""
        android:layout_width="300dp"
        android:layout_height="250dp"
        android:id="@+id/TVTcpData"/>

    <EditText
        android:hint="SendData"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:id="@+id/EdtTcpMsg"/>
    <Button
        android:text="Send"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onSendMsgClick"/>
</LinearLayout>

TcpHelpre类：

package com.socketnewtwo.fred.mysocketnew;

import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.OutputStreamWriter;
import java.net.InetSocketAddress;
import java.net.Socket;

public class TcpHelper{
    private Socket socket;
    private BufferedWriter bufferedWriter;
    private DataInputStream inputStream;
    private boolean NeedStop;
    private InetSocketAddress SerAddr;
    public  String ErrMsg;
    private ReadThread readThread;           //读取数据线程
    private OnReceiveEvent receiveEvent;     //此事件用于当接收到数据时向主线程通知接收到的数据
    private long LastCheckTime;
    public static interface OnReceiveEvent{
        public  void ReceiveBytes(byte[] iData);
        public  void ReceiveString(String iData);
    }
    public enum EDataType{EDT_BYTE,EDT_STRING};
    private EDataType dataType;
    public TcpHelper(String HostIp,int HostPort) {
        try {
            LastCheckTime=System.currentTimeMillis();
            readThread =new ReadThread();
            NeedStop=false;
            SerAddr =  new InetSocketAddress(HostIp,HostPort);
            NeedStop=false;
            socket = new Socket();
            readThread.start();
        }catch (Exception e)
        {
            ErrMsg=e.getMessage();
        }
    }
    public void SendString(String iText){       //发送字符串
        dataType=EDataType.EDT_STRING;
        toSend(iText);
    }
    public void SendBytes(byte[] iBuf){     //发送字节流指令
        dataType=EDataType.EDT_BYTE;
        String iText = new  String(iBuf);
        toSend(iText);
    }
    //发送数据线程
    private void toSend(final String iText){
        new Thread(
                new Runnable() {
                    @Override
                    public void run() {
                        try {
                            bufferedWriter.write(iText);
                            bufferedWriter.flush();
                        } catch (Exception e) {
                        }
                    }
                }
        ).start();
    }
    public boolean isConnected(){
        return socket.isConnected();
    }
    //设置通知事件
    public void setReceiveEvent(OnReceiveEvent iEvent){
        receiveEvent=iEvent;
    }
    //读取线程
    private class ReadThread extends Thread{
        @Override
        public void run() {
            while (!NeedStop){
                try {
                    if (!socket.isConnected() || socket.isClosed()){
                        socket.connect(SerAddr,3000);
                        if(bufferedWriter==null)
                            bufferedWriter =new BufferedWriter(new OutputStreamWriter( socket.getOutputStream(),"utf-8"));
                        if(inputStream==null)
                            inputStream = new DataInputStream(socket.getInputStream());
                    }
                    else {
                        if(inputStream.available()>0){
                            byte[] recData = new byte[inputStream.available()];
                            inputStream.read(recData);
                            if(receiveEvent!=null)
                            {
                                if(dataType==EDataType.EDT_BYTE) {
                                    receiveEvent.ReceiveBytes(recData);
                                }
                                else {
                                    String s=new String(recData,"utf-8");
                                    receiveEvent.ReceiveString(s);
                                }
                            }
                        }
                        if (System.currentTimeMillis()-LastCheckTime>5000)
                        {
                            try {
                                LastCheckTime=System.currentTimeMillis();
                                socket.sendUrgentData(0xFF);
                            }catch (Exception e){
                                socket.close();
                                socket = new Socket();
                                bufferedWriter=null;
                                inputStream =null;
                            }
                        }
                    }

                }catch (Exception e){

                }
            }
        }
    }
}

MainActivity主程序：

package com.socketnewtwo.fred.mysocketnew;

import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private TcpHelper tcpHelper;
    private String SerIp;
    private int SerPort;
    private EditText InputMsg;
    private TextView RecMsg;
    private String TcpRecData;
    private MyHandler handler;
    private TcpReceive tcpReceive;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RecMsg = findViewById(R.id.TVTcpData);
        InputMsg = findViewById(R.id.EdtTcpMsg);
        RecMsg.setMovementMethod(ScrollingMovementMethod.getInstance());
    }

    public class TcpReceive implements TcpHelper.OnReceiveEvent {
        public synchronized void ReceiveBytes(byte[] iData) {
        }

        public synchronized void ReceiveString(String iData) {
            TcpRecData = iData;
            Message msg = new Message();
            msg.what = 1;
            handler.sendMessage(msg);
        }
    }

    class MyHandler extends Handler {
        public MyHandler() {
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case 1:
                    RecMsg.append(TcpRecData+"\n");  //接收到数据显示到TextView上
                    break;
            }
            super.handleMessage(msg);
        }
    }

    public void onConnectClick(View view) {
        if (tcpHelper == null) {
            SerIp = ((EditText) findViewById(R.id.EdtTcpSerIp)).getText().toString();
            SerPort = Integer.parseInt(((TextView) findViewById(R.id.EdtTcpPort)).getText().toString());
            tcpHelper = new TcpHelper(SerIp, SerPort);
            tcpReceive = new TcpReceive();
            tcpHelper.setReceiveEvent(tcpReceive);
            handler = new MyHandler();
        }
    }

    public void onSendMsgClick(View view) {
        try {
            String iText = InputMsg.getText().toString();
            tcpHelper.SendString(iText);
        } catch (Exception e) {

        }
    }
}

注：Android客户端要和PC端的编码格式一样

String s=new String(recData,"utf-8");