【Android Socket专题】： TCP通信客户端app的demo的实现

UDP Client客户端  http://blog.csdn.net/shankezh/article/details/50731287

UDP Server服务器 http://blog.csdn.net/shankezh/article/details/51452811

TCP Client客户端  http://blog.csdn.net/shankezh/article/details/70763579

TCP Server服务器 http://blog.csdn.net/shankezh/article/details/51555455

-------

Android TCP 客户端实现，规划界面如下：

对应XML代码如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:weightSum="5"    >    <LinearLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:orientation="vertical"        android:layout_weight="1">        <LinearLayout            android:layout_width="match_parent"            android:layout_height="0dp"            android:layout_weight="1"            android:orientation="horizontal">            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="ip:"/>            <EditText                android:layout_width="0dp"                android:layout_weight="2"                android:layout_height="match_parent"                android:gravity="center"                android:id="@+id/edit_tcpClientIp"/>            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="port"/>            <EditText                android:id="@+id/edit_tcpClientPort"                android:layout_width="0dp"                android:layout_height="match_parent"                android:layout_weight="1" />        </LinearLayout>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="0dp"            android:orientation="horizontal"            android:layout_weight="1">            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="ID(英文或数字):"/>            <EditText                android:layout_width="0dp"                android:layout_weight="1"                android:layout_height="match_parent"                android:id="@+id/edit_tcpClientID"/>            <Button                android:layout_width="wrap_content"                android:layout_height="match_parent"                android:text="随机生成"                android:id="@+id/btn_tcpClientRandomID"/>        </LinearLayout>    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        >        <Button            android:id="@+id/btn_tcpClientConn"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="连接" />        <Button            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="断开"            android:id="@+id/btn_tcpClientClose"/>        <Button            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="清除接收区"            android:id="@+id/btn_tcpCleanClientRecv"/>        <Button            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="清除发送区"            android:id="@+id/btn_tcpCleanClientSend"/>    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:orientation="vertical"        android:layout_weight="2">        <TextView            android:layout_width="match_parent"            android:layout_height="0dp"            android:layout_weight="1"            android:gravity="bottom"            android:text="接收区：" />        <TextView            android:layout_width="match_parent"            android:layout_weight="5"            android:layout_height="0dp"            android:id="@+id/txt_ClientRcv"            android:background="@android:color/holo_blue_light"            />    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:orientation="vertical"        android:layout_weight="2">        <TextView            android:layout_width="wrap_content"            android:layout_height="0dp"            android:layout_weight="1"            android:text="发送区：" />        <TextView            android:id="@+id/txt_ClientSend"            android:layout_width="match_parent"            android:layout_height="0dp"            android:layout_weight="7"            android:background="@android:color/holo_purple" />        <LinearLayout            android:layout_width="match_parent"            android:layout_height="0dp"            android:orientation="horizontal"            android:layout_weight="2">            <EditText                android:layout_width="0dp"                android:layout_weight="5"                android:id="@+id/edit_tcpClientSend"                android:layout_height="match_parent" />            <Button                android:layout_width="0dp"                android:layout_weight="1"                android:layout_height="match_parent"                android:layout_gravity="right"                android:id="@+id/btn_tcpClientSend"                android:text="发送"/>        </LinearLayout>    </LinearLayout></LinearLayout>

界面完成，关键类点名（只点名，不解释，详细解释请使用搜索引擎，太占篇幅）：

1、Socket;

2、PrintWriter；

3、InputStream；

4、DataInputStream；

以上是构建tcp客户端的关键类，需要明白。

客户端比服务器实现简单很多，下面是实现思路描述：

1、直接使用Socket类，通过ip和port创建连接；

2、创建接收与发送使用，超时等资源配置；

3、建立监听循环机制；

4、跳出循环，关闭连接。

发送消息则直接使用之前创建的发送资源推送即可，不做描述。

具体代码如下：

package jason.tcpdemo.coms;import android.content.Intent;import android.util.Log;import java.io.BufferedReader;import java.io.DataInput;import java.io.DataInputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.Socket;import jason.tcpdemo.funcs.FuncTcpClient;import jason.tcpdemo.funcs.FuncTcpServer;/** * Created by Jason Zhu on 2017-04-25. *  */public class TcpClient implements Runnable{    private String TAG = "TcpClient";    private String  serverIP = "192.168.88.141";    private int serverPort = 1234;    private PrintWriter pw;    private InputStream is;    private DataInputStream dis;    private boolean isRun = true;    private Socket socket = null;    byte buff[]  = new byte[4096];    private String rcvMsg;    private int rcvLen;    public TcpClient(String ip , int port){        this.serverIP = ip;        this.serverPort = port;    }    public void closeSelf(){        isRun = false;    }    public void send(String msg){        pw.println(msg);        pw.flush();    }    @Override    public void run() {        try {            socket = new Socket(serverIP,serverPort);            socket.setSoTimeout(5000);            pw = new PrintWriter(socket.getOutputStream(),true);            is = socket.getInputStream();            dis = new DataInputStream(is);        } catch (IOException e) {            e.printStackTrace();        }        while (isRun){            try {                rcvLen = dis.read(buff);                rcvMsg = new String(buff,0,rcvLen,"utf-8");                Log.i(TAG, "run: 收到消息:"+ rcvMsg);                Intent intent =new Intent();                intent.setAction("tcpClientReceiver");                intent.putExtra("tcpClientReceiver",rcvMsg);                FuncTcpClient.context.sendBroadcast(intent);//将消息发送给主界面                if (rcvMsg.equals("QuitClient")){   //服务器要求客户端结束                    isRun = false;                }            } catch (IOException e) {                e.printStackTrace();            }        }        try {            pw.close();            is.close();            dis.close();            socket.close();        } catch (IOException e) {            e.printStackTrace();        }    }}

以上，核心代码处理完成，通过以上，可以完成tcp 客户端对服务器的连接；

对应界面操作代码如下（几个类的介绍和UDP一样，不赘述）：

package jason.tcpdemo.funcs;import android.annotation.SuppressLint;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.os.Message;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import java.lang.ref.WeakReference;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.logging.Handler;import jason.tcpdemo.R;import jason.tcpdemo.coms.TcpClient;/** * Created by Jason Zhu on 2017-04-24. *  */public class FuncTcpClient extends Activity {    private String TAG = "FuncTcpClient";    @SuppressLint("StaticFieldLeak")    public static Context context ;    private Button btnStartClient,btnCloseClient, btnCleanClientSend, btnCleanClientRcv,btnClientSend,btnClientRandom;    private TextView txtRcv,txtSend;    private EditText editClientSend,editClientID, editClientPort,editClientIp;    private static TcpClient tcpClient = null;    private MyBtnClicker myBtnClicker = new MyBtnClicker();    private final MyHandler myHandler = new MyHandler(this);    private MyBroadcastReceiver myBroadcastReceiver = new MyBroadcastReceiver();    ExecutorService exec = Executors.newCachedThreadPool();    private class MyBtnClicker implements View.OnClickListener{        @Override        public void onClick(View view) {            switch (view.getId()){                case R.id.btn_tcpClientConn:                    Log.i(TAG, "onClick: 开始");                    btnStartClient.setEnabled(false);                    btnCloseClient.setEnabled(true);                    btnClientSend.setEnabled(true);                    tcpClient = new TcpClient(editClientIp.getText().toString(),getPort(editClientPort.getText().toString()));                    exec.execute(tcpClient);                    break;                case R.id.btn_tcpClientClose:                    tcpClient.closeSelf();                    btnStartClient.setEnabled(true);                    btnCloseClient.setEnabled(false);                    btnClientSend.setEnabled(false);                    break;                case R.id.btn_tcpCleanClientRecv:                    txtRcv.setText("");                    break;                case R.id.btn_tcpCleanClientSend:                    txtSend.setText("");                    break;                case R.id.btn_tcpClientRandomID:                    break;                case R.id.btn_tcpClientSend:                    Message message = Message.obtain();                    message.what = 2;                    message.obj = editClientSend.getText().toString();                    myHandler.sendMessage(message);                    exec.execute(new Runnable() {                        @Override                        public void run() {                            tcpClient.send(editClientSend.getText().toString());                        }                    });                    break;            }        }    }    private class MyHandler extends android.os.Handler{        private WeakReference<FuncTcpClient> mActivity;        MyHandler(FuncTcpClient activity){            mActivity = new WeakReference<FuncTcpClient>(activity);        }        @Override        public void handleMessage(Message msg) {            if (mActivity != null){                switch (msg.what){                    case 1:                        txtRcv.append(msg.obj.toString());                        break;                    case 2:                        txtSend.append(msg.obj.toString());                        break;                }            }        }    }    private class MyBroadcastReceiver extends BroadcastReceiver{        @Override        public void onReceive(Context context, Intent intent) {            String mAction = intent.getAction();            switch (mAction){                case "tcpClientReceiver":                    String msg = intent.getStringExtra("tcpClientReceiver");                    Message message = Message.obtain();                    message.what = 1;                    message.obj = msg;                    myHandler.sendMessage(message);                    break;            }        }    }    private int getPort(String msg){        if (msg.equals("")){            msg = "1234";        }        return Integer.parseInt(msg);    }    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.tcp_client);        context = this;        bindID();        bindListener();        bindReceiver();        Ini();    }    private void bindID(){        btnStartClient = (Button) findViewById(R.id.btn_tcpClientConn);        btnCloseClient = (Button) findViewById(R.id.btn_tcpClientClose);        btnCleanClientRcv = (Button) findViewById(R.id.btn_tcpCleanClientRecv);        btnCleanClientSend = (Button) findViewById(R.id.btn_tcpCleanClientSend);        btnClientRandom = (Button) findViewById(R.id.btn_tcpClientRandomID);        btnClientSend = (Button) findViewById(R.id.btn_tcpClientSend);        editClientPort = (EditText) findViewById(R.id.edit_tcpClientPort);        editClientIp = (EditText) findViewById(R.id.edit_tcpClientIp);        editClientSend = (EditText) findViewById(R.id.edit_tcpClientSend);        txtRcv = (TextView) findViewById(R.id.txt_ClientRcv);        txtSend = (TextView) findViewById(R.id.txt_ClientSend);    }    private void bindListener(){        btnStartClient.setOnClickListener(myBtnClicker);        btnCloseClient.setOnClickListener(myBtnClicker);        btnCleanClientRcv.setOnClickListener(myBtnClicker);        btnCleanClientSend.setOnClickListener(myBtnClicker);        btnClientRandom.setOnClickListener(myBtnClicker);        btnClientSend.setOnClickListener(myBtnClicker);    }    private void bindReceiver(){        IntentFilter intentFilter = new IntentFilter("tcpClientReceiver");        registerReceiver(myBroadcastReceiver,intentFilter);    }    private void Ini(){        btnCloseClient.setEnabled(false);        btnClientSend.setEnabled(false);    }}

记得添加权限：

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

效果图如下：

开发环境：Android Studio

附上demo包：

TCP（客户端和服务器demo）