为android写的一个UDP Socket连接组件

https://github.com/SuperSanders/android-network

适用于Java Android上的Socket连接组件。

package android.net.udp;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.SocketException;

public class SocketBase {

	private int dataLength = 1024;
	private DatagramSocket mSocket;
	private DatagramPacket receivePacket;
	private SocketAddress sendAddress;
	private SocketCallback callback;

	public SocketBase(SocketCallback callback) throws SocketException {
		byte[] receiveData = new byte[dataLength];
		receivePacket = new DatagramPacket(receiveData, dataLength);
		mSocket = new DatagramSocket();
		this.callback = callback;
	}

	public void receive() throws IOException {
		mSocket.receive(receivePacket);
		if (callback != null) {
			int len = receivePacket.getLength();
			byte[] temp = new byte[len];
			System.arraycopy(receivePacket.getData(), 0, temp, 0, len);
			callback.receive(temp);
			temp = null;
		}
	}

	public void setSendAddress(String host, int port) {
		sendAddress = new InetSocketAddress(host, port);
	}

	public void send(byte[] data) throws IOException {
		if (data.length < dataLength) {
			DatagramPacket sendPacket = new DatagramPacket(data, data.length, sendAddress);
			mSocket.send(sendPacket);
		} else {
			throw new IOException("发送数据包大于限定长度");
		}
	}

	public void close() {
		if (mSocket != null) {
			if (!mSocket.isClosed()) {
				mSocket.close();
			}
			if (mSocket.isConnected()) {
				mSocket.disconnect();
			}
		}
		mSocket = null;
	}
}

package android.net.udp;

import java.io.IOException;
import java.net.SocketException;
import java.util.Vector;

public class SocketConnect implements Runnable {

	private static final Vector<byte[]> datas = new Vector<byte[]>();// 待发送数据队列
	private String host = null;
	private int port = -1;
	private boolean isConnect = false;
	private boolean isReceive = false;
	private boolean isSend = false;
	private SocketBase mSocket;
	private SendRunnable sendRunnable;
	private SocketCallback callback;

	public SocketConnect(SocketCallback callback) {
		this.callback = callback;
		sendRunnable = new SendRunnable();
	}

	@Override
	public void run() {
		if (host == null || port == -1) {
			throw new NullPointerException("new set address");
		}
		isConnect = true;
		while (isConnect) {
			try {
				System.out.println("UDP正在连接");
				mSocket = new SocketBase(callback);
			} catch (SocketException se) {
				try {
					Thread.sleep(1000 * 6);
					continue;
				} catch (InterruptedException e) {
					continue;
				}
			}
			mSocket.setSendAddress(host, port);
			isReceive = true;
			isSend = true;
			System.out.println("UDP连接成功");
			new Thread(sendRunnable).start();
			System.out.println("开始接受UDP消息");
			while (isReceive) {
				try {
					mSocket.receive();
				} catch (IOException e) {
					break;
				}
			}
			sendRunnable.stop();
			mSocket.close();
			isReceive = false;
			mSocket = null;
		}
	}

	public void setRemoteAddress(String host, int port) {
		this.host = host;
		this.port = port;
	}

	public void send(byte[] data) {
		sendRunnable.send(data);
	}

	public void stop() {
		isConnect = false;
		isReceive = false;
		mSocket.close();
		sendRunnable.stop();
	}

	private class SendRunnable implements Runnable {

		@Override
		public void run() {
			synchronized (this) {
				while (isSend) {
					if (datas.size() < 1) {
						try {
							this.wait();
						} catch (InterruptedException e) {
							continue;
						}
					}
					while (datas.size() > 0) {
						byte[] buffer = datas.remove(0);// 获取一条发送数据
						if (isSend) {
							try {
								mSocket.send(buffer);
							} catch (IOException e) {
								continue;
							}
						} else {
							this.notify();
						}
					}
				}
			}
		}

		public synchronized void stop() {
			isSend = false;
			this.notify();
		}

		public synchronized void send(byte[] data) {
			datas.add(data);
			this.notify();
		}
	}
}

package android.net.udp;

public abstract interface SocketCallback {

	public static final int UDP_DATA = 1;
	
	public abstract void receive(byte[] buffer);
	
}

使用方法：

SocketConnect connect = new SocketConnect(new SocketCallback() {
	@Override
	public void receive(byte[] buffer) {
		System.out.println("Server Message ：" + new String(buffer));
	    }	
	});
	connect.setRemoteAddress("localhost", 9999);
	new Thread(connect).start();