客户端发给定向发送消息 - 连接封装

最新推荐文章于 2022-02-16 15:42:58 发布

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本文详细介绍了一种基于TCP协议的通信实现方案，包括服务端和Android客户端的代码设计。服务端使用Java实现，能够处理多个客户端的连接请求，进行认证和数据交换。客户端则通过Android应用程序与服务端建立连接，实现数据的发送与接收。

之前都是再activity中实现的，当应用销毁的时候客户端也会断开连接，如果没有销毁长时间也会断开连接，因此相关通信需要写在service中。客户端创建一个Connector.java来专门管理相关请求，连接和通信，CoreService作为一个服务在后台处理相关请求ConnectorManager.java来管理Connector里面的请求，CoreService会调用ConnectorManager并发起连接，MainActivity.java发起通信数据

java端代码TCPServer.java

package com.ldw.socket.server;

import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class TCPServer {
	
	//创建一个容器，存储客户端
	//private static List<Socket> clients = new LinkedList<Socket>();
	
	//认证信息和客户端信息
	private static Map<String, Socket> clients = new LinkedHashMap<String, Socket>();

	public static void main(String[] args) {
		int port = 10002;
		try {
			ServerSocket server = new ServerSocket(port);

			while (true) {

				// 获得客户端连接
				// 阻塞式方法
				System.out.println("准备阻塞...");
				final Socket client = server.accept();
				System.out.println("阻塞完成...");
				
				// 将客户端添加到容器中
				//clients.add(client);

				//开一个子线程防止阻塞，下面的内容是阻塞式的
				new Thread(new Runnable() {
					@Override
					public void run() {
						try {
							// 输入流，为了获取客户端发送的数据
							InputStream is = client.getInputStream();

							// 输出流,给客户端写数据
							OutputStream os = client.getOutputStream();

							byte[] buffer = new byte[1024];
							int len = -1;
							System.out.println("准备read...");
							while ((len = is.read(buffer)) != -1) {
								System.out.println("read完成...");

								String text = new String(buffer, 0, len);
								System.out.println(text);
								
								if (text.startsWith("#")) {
									// 将客户端添加到 容器中
									clients.put(text, client);
									
									// 输出数据到客户端
									os.write("认证成功".getBytes());
								} else {
									// 输出数据到客户端
									os.write("收到你的请求".getBytes());
									
									//拆分用户名和内容信息
									String[] split = text.split(":");
									String key = "#" + split[0];
									String content = split[1];
									
									System.out.println(content);
									
									// 给谁发消息
									Socket s = clients.get(key);
									if (s != null) {
										System.out.println("is not null");
										
										OutputStream output = s.getOutputStream();
										output.write(content.getBytes());
									} else {
										System.out.println("is null");
									}
								
								}

							}
						} catch (Exception e) {
							e.printStackTrace();
						}
					}
				}).start();

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

}

客户端通过Android来实现，布局文件，布局文件有几个按键，来方便触发

<LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/et"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    
    <!--
	<EditText 
	    android:layout_width="match_parent"
	    android:layout_height="wrap_content"
	    android:hint="认证内容"
	    android:id="@+id/et_auth"
	    />
	
	<Button 
	    android:text="连接"
	    android:layout_width="match_parent"
	    android:layout_height="wrap_content"
		android:onClick="clickConnect"
	    />
	
	<Button 
	    android:text="认证"
	    android:layout_width="match_parent"
	    android:layout_height="wrap_content"
		android:onClick="clickAuth"
	    />  -->

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="clickMessage"
        android:text="通讯" />

    <!--
	<Button 
	    android:text="断开连接"
	    android:layout_width="match_parent"
	    android:layout_height="wrap_content"
		android:onClick="clickDisConnect"
	    /> -->

</LinearLayout>

逻辑代码MainActivity.java界面信息，创建服务，并发送消息

package org.ldw.socket.client;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

import org.ldw.socket.client.request.AuthRequest;
import org.ldw.socket.client.request.Request;
import org.ldw.socket.client.request.TextRequest;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
	private EditText et;
	private EditText et_auth;
	
	private PushReceiver receiver = new PushReceiver() {

		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();

			Log.d("activity", "receive");

			if (PushReceiver.ACTION_TEXT.equals(action)) {
				String text = intent.getStringExtra(PushReceiver.DATA_KEY);
				Toast.makeText(getApplicationContext(), text,
						Toast.LENGTH_SHORT).show();
			}

		}
	};
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		et = (EditText) findViewById(R.id.et);
		et_auth = (EditText) findViewById(R.id.et_auth);
		
		startService(new Intent(this, CoreService.class));

		IntentFilter filter = new IntentFilter();
		filter.addAction(PushReceiver.ACTION_TEXT);
		registerReceiver(receiver, filter);
	}
	
	@Override
	protected void onDestroy() {
		super.onDestroy();

		unregisterReceiver(receiver);
	}


	public void clickMessage(View v) {
		//获取输入框的内容
		final String content = et.getText().toString().trim();
		if (TextUtils.isEmpty(content)) {
			return;
		}
		
		ConnectorManager.getInstance().putRequest(content);

	}
	
}

CoreService.java服务，来启动连接，并监听通信，同时发送广播，发送广播的目的是在MainActivity中Toast弹出相关信息，主要是为了在主界面刷新UI

package org.ldw.socket.client;

import org.ldw.socket.client.ConnectorManager.ConnectorListener;
import org.ldw.socket.client.request.AuthRequest;

import android.app.Service;
import android.content.Intent;
import android.os.Build;
import android.os.IBinder;
import android.util.Log;

public class CoreService extends Service implements ConnectorListener {
	private Connector connector;

	private ConnectorManager connectorManager;

	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
		connectorManager = ConnectorManager.getInstance();

		new Thread(new Runnable() {

			@Override
			public void run() {
				// //创建连接器
				// connector = new Connector();
				// //监听连接状态
				// connector.setConnectorListener(c);
				// connector.connect();
				// connector.auth("#A");
				connectorManager.setConnectorListener(CoreService.this);
				connectorManager.connnect(request);
			}
		}).start();
	}
	
	@Override
	public void pushData(String data) {

		Log.d("coreService", "data : " + data);

		Intent intent = new Intent();
		intent.setAction(PushReceiver.ACTION_TEXT);
		intent.putExtra(PushReceiver.DATA_KEY, data);
		sendBroadcast(intent);
	}
}

Connector.java客户端三次握手，连接的处理

package org.ldw.socket.client;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

public class Connector {
	private String dstName = "192.168.1.100";
	private int dstPort = 10002;
	private Socket client;
	private ConnectorListener listener;

	//先进先出，后进后出
	private ArrayBlockingQueue<String> queue = new ArrayBlockingQueue<String>(8);

	public Connector() {

	}

	public void connect() {
		try {
			// 三次握手
			if (client == null || client.isClosed()) {
				client = new Socket(dstName, dstPort);
			}

			new Thread(new RequestWorker()).start();

			new Thread(new Runnable() {

				@Override
				public void run() {
					try {
						InputStream is = client.getInputStream();
						byte[] buffer = new byte[1024];
						int len = -1;
						while ((len = is.read(buffer)) != -1) {
							final String text = new String(buffer, 0, len);

							System.out.println("text : " + text);

							if (listener != null) {
								listener.pushData(text);
							}
						}
					} catch (Exception e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}).start();

		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	//进行通信，相当于下面的send
	public class RequestWorker implements Runnable {

		@Override
		public void run() {

			// 数据通讯
			OutputStream os;
			try {
				os = client.getOutputStream();
				// os.write(content.getBytes());

				while (true) {
					String content = queue.take();
					os.write(content.getBytes());
				}

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

		}
	}

	public void auth(String auth) {
		putRequest(auth);
		/*
		// 数据通讯
		OutputStream os;
		try {
		os = client.getOutputStream();
		os.write(auth.getBytes());
		} catch (IOException e) {
		e.printStackTrace();
		}

		putRequest(auth);
		*/
	}
	
	public void putRequest(String content) {
		try {
			queue.put(content);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}

	/*
	public void send(String content) {
		// 数据通讯
		OutputStream os;
		try {
		os = client.getOutputStream();
		os.write(content.getBytes());
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	*/

	public void disconnect() {
		// 断开连接
		try {
			if (client != null && !client.isClosed()) {
				client.close();
				client = null;
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		
	}
	
	private ConnectorListener listener;
	public void setConnectorListener(ConnectorListener listener) {
		this.listener = listener;
	}

	//连接的监听，这个接口是作为回调函数使用的
	public interface ConnectorListener {
		void pushData(String data);
	}
}

ConnectorManager.java连接的管理类，同时监听连接

package org.ldw.socket.client;

import org.ldw.socket.client.Connector.ConnectorListener;
import org.ldw.socket.client.request.AuthRequest;
import org.ldw.socket.client.request.Request;

public class ConnectorManager implements ConnectorListener {

	private static ConnectorManager instance;
	private Connector connector;

	public static ConnectorManager getInstance() {
		if (instance == null) {
			synchronized (ConnectorManager.class) {
				if (instance == null) {
					instance = new ConnectorManager();
				}
			}
		}
		return instance;
	}

	private ConnectorManager() {

	}

	public void connnect(String auth) {
		connector = new Connector();
		connector.setConnectorListener(this);
		connector.connect();

		connector.auth(auth);
	}

	public void connnect(String auth) {
		connector = new Connector();
		connector.setConnectorListener(this);
		connector.connect();

		connector.auth(auth);
	}

	public void putRequest(String request) {
		connector.putRequest(request);
	}

	@Override
	public void pushData(String data) {
		System.out.println("data : " + data);

		if (listener != null) {
			listener.pushData(data);
		}
	}

	private ConnectorListener listener;
	//连接的监听，这个接口是作为回调函数使用的
	public void setConnectorListener(ConnectorListener listener) {
		this.listener = listener;
	}

	public interface ConnectorListener {
		void pushData(String data);
	}
}

PushReceiver.java广播接收者，接受服务中发送的广播

package org.ldw.socket.client;

import android.content.BroadcastReceiver;

public abstract class PushReceiver extends BroadcastReceiver {

	public static final String ACTION_TEXT = "com.ldw.action.text";
	
	public static final String DATA_KEY = "data";
}

Manifist.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.ldw.socket.client"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

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

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="org.ldw.socket.client.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name="org.ldw.socket.client.CoreService" >
        </service>
    </application>

</manifest>