import android.os.BatteryManager;
import android.os.IBinder;
import android.support.annotation.Nullable;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Random;
public class TCPServerService extends Service {
private boolean mIsServiceDestoryed = false;
private String[] mDefinedMessage = new String[]{ //随即回复的信息
“给次机会我啊”,
“怎么给你机会?”,
“我以前没得选,现在我选回做好人”,
“好啊,你去跟法官说啊,看他给不给你当”,
“你这是让我死?”,
“对唔住,我是差人”
};
@Override
public void onCreate() {
new Thread(new TcpServer()).start();
super.onCreate();
}
private class TcpServer implements Runnable{
@Override
public void run() {
ServerSocket serverSocket = null;
try {
//监听本地8688接口
serverSocket = new ServerSocket(8868);
} catch (IOException e) {
System.err.println(“establish tcp server failed,port:8868”);
e.printStackTrace();
return ;
}
while (!mIsServiceDestoryed){
try {
//接收客户请求
final Socket client = serverSocket.accept();
System.out.println(“accept”);
new Thread(){
@Override
public void run() {
try {
responseClient(client);
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
private void responseClient(Socket client) throws IOException {
//用于接收客户消息
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
//用于向客户发送信息
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(client.getOutputStream())),true);
out.println(“欢迎来到聊天室!”);
while (!mIsServi
ceDestoryed){
String str = in.readLine();
System.out.println(“msg from client:” + str);
if(str == null){
//客户端断开连接
break;
}
int i = new Random().nextInt(mDefinedMessage.length);
String msg = mDefinedMessage[i];
out.println(msg);
System.out.println(“send :” + msg);
}
//客户端退出的操作
System.out.println(“client quit”);
//关闭流
out.close();
in.close();
client.close();
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
mIsServiceDestoryed = true;
super.onDestroy();
}
}
接下来看客户端,当activity启动的时候会在onCreate中开启一个线程去连接服务器Socket,这里采用超时重连的策略,每次连接失败后都会重新尝试连接,为了降低重试机制的开销,我们加入了休眠模式,即每次重试间隔为1s
package com.rikka.socket1;
import android.app.Activity;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import com.rikka.socket1.TCPServerService;
public class MainActivity extends Activity {
private Socket mClientSocket,socket = null;
private Handler mHandler = new Handler();
private int MESSAGE_SOCKET_CONNECTED = 1;
private int MESSAGE_RECEIVE_NEW_MSG = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//连接socket
while(socket == null){
try {
socket = new Socket(“localhost”,8688);
mClientSocket = socket;
PrintWriter mPrintWrite = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
mHandler.sendEmptyMessage(MESSAGE_SOCKET_CONNECTED);
System.out.println(“connect server success.”);
} catch (IOException e) {
SystemClock.sleep(1000);
e.printStackTrace();
}
}
//接收服务端的消息
try {
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while(!MainActivity.this.isFinishing()){
String msg = br.readLine();
System.out.println(“receive :” + msg);
if(msg != null){
long time = System.currentTimeMillis();
final String showMsg = “server " + time +”:" + msg + “\n”;
mHandler.obtainMessage(MESSAGE_RECEIVE_NEW_MSG,showMsg).sendToTarget();
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
//当Activity退出时则关闭当前Socket
@Override
protected void onDestroy() {
if(mClientSocket != null){
try {
mClientSocket.shutdownInput();
mClientSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
super.onDestroy();
}
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} catch (IOException e) {
e.printStackTrace();
}
}
super.onDestroy();
}
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资料展示:
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[外链图片转存中…(img-PMxPKLib-1647753979713)]
[外链图片转存中…(img-eRSTnGaQ-1647753979714)]
[外链图片转存中…(img-hxTKN40A-1647753979714)]