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小编给大家分享一下Android中如何实现Socket通信，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
公司要实现一个简单的聊天功能，提前研究一下Socket通信，而公司的服务端功能又没有实现，所以这里就把服务端的功能放到一个界面实现了。
直接上代码：
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout 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" tools:context=".MainActivity"> <EditText android:id="@+id/et_ip" android:layout_width="0dp" android:layout_height="wrap_content" android:hint="IP：端口" android:text="127.0.0.1:8081" android:layout_margin="10dp" android:padding="10dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toLeftOf="@+id/btn_connect" app:layout_constraintTop_toTopOf="parent" /> <Button android:id="@+id/btn_connect" android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent" app:layout_constraintRight_toRightOf="parent" android:layout_margin="10dp" android:text="连接"/> <TextView android:id="@+id/tv_receive" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="接受数据：" app:layout_constraintTop_toBottomOf="@+id/et_ip" app:layout_constraintLeft_toLeftOf="parent" android:textSize="14sp" android:layout_margin="10dp"/> <ScrollView android:id="@+id/sv_content" android:layout_width="match_parent" android:layout_height="200dp" app:layout_constraintTop_toBottomOf="@+id/tv_receive" app:layout_constraintLeft_toLeftOf="parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/tv_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="聊天内容" android:textColor="#000" android:textSize="16sp" android:layout_margin="10dp"/> </LinearLayout> </ScrollView> <EditText android:id="@+id/et_input" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="发送内容" android:layout_margin="10dp" android:padding="10dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintTop_toBottomOf="@+id/sv_content" /> <Button android:id="@+id/btn_service" android:layout_width="0dp" android:layout_height="wrap_content" app:layout_constraintTop_toBottomOf="@+id/et_input" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toLeftOf="@+id/btn_send" android:layout_margin="10dp" android:text="服务端发送"/> <Button android:id="@+id/btn_send" android:layout_width="0dp" android:layout_height="wrap_content" app:layout_constraintTop_toBottomOf="@+id/et_input" app:layout_constraintLeft_toRightOf="@+id/btn_service" app:layout_constraintRight_toRightOf="parent" android:layout_margin="10dp" android:text="发送"/> </androidx.constraintlayout.widget.ConstraintLayout>
主要代码：
package com.app.socketdemo;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.Html;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import androidx.appcompat.app.AppCompatActivity;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
public class MainActivity extends AppCompatActivity {
@BindView(R.id.et_ip)
EditText etIp;
@BindView(R.id.btn_connect)
Button btnConnect;
@BindView(R.id.tv_receive)
TextView tvReceive;
@BindView(R.id.tv_content)
TextView tvContent;
@BindView(R.id.et_input)
EditText etInput;
@BindView(R.id.btn_send)
Button btnSend;
@BindView(R.id.sv_content)
ScrollView svContent;
@BindView(R.id.btn_service)
Button btnService;
private StringBuffer strMsg = new StringBuffer();
private final int MESSAGE_ERROR = 0;
private final int MESSAGE_SUCCEED = 1;
private final int MESSAGE_RECEIVE = 2;
private Socket sock;
private OutputStream outx;
private InputStream inx;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//启动服务端
new Thread(() -> new Server().startService()).start();
}
@OnClick({R.id.btn_connect, R.id.btn_service, R.id.btn_send})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.btn_connect://连接服务端
String strip = etIp.getText().toString().trim();
if (strip.indexOf(":") >= 0) {
//启动连接
new Socket_thread(strip).start();
}
break;
case R.id.btn_service:
if (!TextUtils.isEmpty(etInput.getText().toString())) {
sendString("服务端：" + etInput.getText().toString().trim());
etInput.setText("");
} else {
Toast.makeText(this, "输入不可为空", Toast.LENGTH_SHORT).show();
}
break;
case R.id.btn_send:
if (!TextUtils.isEmpty(etInput.getText().toString())) {
sendStrSocket("客户端：" + etInput.getText().toString().trim());
etInput.setText("");
} else {
Toast.makeText(this, "输入不可为空", Toast.LENGTH_SHORT).show();
}
break;
}
}
/**
* 连接服务器
*/
class Socket_thread extends Thread {
private String IP = "";//ip地址
private int PORT = 0;//端口号
public Socket_thread(String strip) {
//如: 127.0.0.1:8081
String[] stripx = strip.split(":");
this.IP = stripx[0];
this.PORT = Integer.parseInt(stripx[1]);
}
@Override
public void run() {
try {
disSocket();
//连接服务器，此处会一直处于阻塞，直到连接成功
sock = new Socket(this.IP, this.PORT);
//阻塞停止，表示连接成功
setMessage("连接成功", MESSAGE_SUCCEED);
} catch (Exception e) {
setMessage("连接服务器时异常", MESSAGE_ERROR);
e.printStackTrace();
return;
}
try {
//获取到输入输出流
outx = sock.getOutputStream();
inx = sock.getInputStream();
} catch (Exception e) {
setMessage("获取输入输出流异常", MESSAGE_ERROR);
e.printStackTrace();
return;
}
new Inx().start();
}
}
/**
* 循环接收数据
*/
class Inx extends Thread {
@Override
public void run() {
while (true) {
byte[] bu = new byte[1024];
try {
int conut = inx.read(bu);//设备重启，异常 将会一直停留在这
if (conut == -1) {
setMessage("服务器断开", MESSAGE_ERROR);
disSocket();
return;
}
String strread = new String(bu, "GBK").trim();
setMessage(strread, MESSAGE_RECEIVE);
} catch (IOException e) {
System.out.println(e);
}
}
}
}
/**
* 断开连接
*/
private void disSocket() {
if (sock != null) {
try {
outx.close();
inx.close();
sock.close();
sock = null;
} catch (Exception e) {
setMessage("断开连接时发生错误", MESSAGE_ERROR);
}
}
}
@SuppressLint("HandlerLeak")
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.arg1) {
case MESSAGE_ERROR:
disSocket();
strMsg.append(msg.obj + "<br>");
tvContent.setText(Html.fromHtml(strMsg.toString()));
break;
case MESSAGE_SUCCEED:
strMsg.append(msg.obj + "<br>");
tvContent.setText(Html.fromHtml(strMsg.toString()));
break;
case MESSAGE_RECEIVE:
//收到数据
strMsg.append(msg.obj);
if (!strMsg.toString().substring(strMsg.length() - 4, strMsg.length()).equals("<br>")) {
strMsg.append("<br>");
}
tvContent.setText(Html.fromHtml(strMsg.toString()));
svContent.fullScroll(ScrollView.FOCUS_DOWN);
break;
default:
break;
}
}
};
/**
* 发送消息
*/
private void sendStrSocket(final String senddata) {
new Thread(new Runnable() {
@Override
public void run() {
try {
String str = "<font color='#EE2C2C'>" + senddata + "</font>";
outx.write(str.getBytes("gbk"));//"utf-8"
} catch (Exception e) {
setMessage("数据发送异常", MESSAGE_ERROR);
}
}
}).start();
}
/**
* 消息处理
*/
private void setMessage(String obj, int arg1){
Message message = new Message();
message.arg1 = arg1;
message.obj = obj;
handler.sendMessage(message);
}
/*************************************************************服务端(用于测试)**********************************************************************/
private String msg = "";
public class Server {
ServerSocket serverSocket = null;
public final int port = 8081;
public Server() {
//输出服务器的IP地址
try {
InetAddress addr = InetAddress.getLocalHost();
serverSocket = new ServerSocket(port);
} catch (IOException e) {
e.printStackTrace();
}
}
public void startService() {
try {
while (true) {
Socket socket = null;
socket = serverSocket.accept();//等待一个客户端的连接，在连接之前，此方法是阻塞的
new ConnectThread(socket).start();
new ConnectThread1(socket).start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 向客户端发送信息
*/
class ConnectThread extends Thread {
Socket socket = null;
public ConnectThread(Socket socket) {
super();
this.socket = socket;
}
@Override
public void run() {
try {
DataOutputStream out = new DataOutputStream(socket.getOutputStream());
while (true) {
Thread.sleep(1000);
if (!TextUtils.isEmpty(msg)) {
String str = "<font color='#4F94CD'>" + msg + "</font>";
out.write(str.getBytes("gbk"));
out.flush();
msg = "";
}
}
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
/**
* 接收客户端信息
*/
class ConnectThread1 extends Thread {
Socket socket = null;
public ConnectThread1(Socket socket) {
super();
this.socket = socket;
}
@Override
public void run() {
try {
DataInputStream inp = new DataInputStream(socket.getInputStream());
while (true) {
byte[] bu = new byte[1024];
int conut = inp.read(bu);//设备重启，异常 将会一直停留在这
if (conut == -1) {
setMessage("服务器断开", MESSAGE_ERROR);
return;
}
String strread = new String(bu, "GBK").trim();
setMessage(strread, MESSAGE_RECEIVE);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
private void sendString(String str) {
msg = str;
}
}运行效果：
以上是“Android中如何实现Socket通信”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注亿速云行业资讯频道！
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