android UDP協議，androidudp協議

android UDP協議，androidudp協議

廢話不多說。直接上代碼！

一. 接收端

1.建立UDP串連

public void init() {
try {

//開關的作用
isRunning = true;
DatagramSocket mUdpSocket = new DatagramSocket(40000);
recivRequest();
} catch (Exception e) {
LogUtil.e(Constant.LOG_TAG, "Exception=" + e);
}
}

2.擷取UDP協議的資料包

public void recivRequest() {

//這是一個線程池，用於處理耗時操作
ThreadPoolManager.getInstance().addTask(new Runnable() {

@Override
public void run() {
while (isRunning) {
try {
byte[] recvBuffer = new byte[1024];
DatagramPacket dataPacket = new DatagramPacket(recvBuffer, recvBuffer.length);
mUdpSocket.receive(dataPacket);

parsePackage(dataPacket);
} catch (IOException e) {
if (null != mUdpSocket && !mUdpSocket.isClosed()) {
mUdpSocket.close();
}
mUdpSocket = null;
e.printStackTrace();
}
}
}
});
}

3.開始準備解析UDP協議的資料包

private void parsePackage(final DatagramPacket dataPacket) {
ThreadPoolManager.getInstance().addTask(new Runnable() {
@Override
public void run() {
String [] datagramPacketSegment = getDatagramPacketSegment(dataPacket);

/*得到資料根據自己的業務需求來做*/

}
});
}

4.解析資料包的方法

private String[] getDatagramPacketSegment(DatagramPacket dataPacket) {
if (null == dataPacket) {
return null;
}

int length = 0;
byte[] bytes = dataPacket.getData();
for (int i = 0; i < bytes.length; i++) {
if (bytes[i] == 0) {
length = i;
break;
}
length = i + 1;
}
String recivContent = new String(bytes, 0, length);

//這個#是跟發送端商量好的間隔符，用於區分多條訊息

String[] reciveString = recivContent.split("#");

return reciveString;
}

二.發送端

這個方法接收兩個參數，一個是用戶端IP,一個是你要發送的內容，如果有多條內容用#號區別

public void sendInteractiveRequest(String ipAddress, String contents) {
    LogUtil.d(Constant.LOG_TAG, "sendInteractiveRequest--->sendContents=" + contents);
    byte[] data = contents.getBytes();
    byte[] recvBuffer = new byte[1024];
    DatagramPacket dataPacket = new DatagramPacket(recvBuffer, recvBuffer.length);
    dataPacket.setData(data);
    dataPacket.setLength(data.length);
    // 設定此資料包包的目標主機的連接埠號碼
    dataPacket.setPort(40000);
    InetAddress sendAddr = null;
    try {
       //根據給定的主機字串名稱返回主機的地址
        sendAddr = InetAddress.getByName(ipAddress);
        //設定接收端主機的地址
        dataPacket.setAddress(sendAddr);
        //發送資料
        mUdpSocket.send(dataPacket);
    } catch (Exception e) {
        LogUtil.e(Constant.LOG_TAG, "Exception=" + e);
    }
}
比如我是這樣發的：參數是你要發送的遙控器的key值

private void sendKeycodeValue(final int keyCode) {
    CommonUtil.setControllerVibrate(LVBXApp.getApp());
    String pairedName = UserMgr.getUserName();
        // 發送按鍵類比操作指令
        ThreadPoolManager.getInstance().addTask(new Runnable() {
            @Override
            public void run() {
                String mainCmd = RemoteCMDType.PAD_CMD + "";
                // 101#15754#99065918#10#78:F7:BE:52:61:2A(cmdType#accountName#interactivePasswd#macAddress#keyCodeValue)
                String contents = mainCmd + "#" + UserMgr.getUserName() + "#" + UserMgr.getInteracPassword() + "#"
                        + CommonUtil.getLocalMacAddress(LVBXApp.getApp()) + "#" + keyCode;
                String ipAdress = UserMgr.getPairedIp();
                InteractiveMgr.getInstance().sendInteractiveRequest(ipAdress, contents);
            }
        });
}
OK.UDP通訊解析到此為止，你可以結合我的上一篇檔案（類比發送遙控器指令），遠程用手機端發送指令控制電視端！