安卓基于socket的服务器通信为什么不可以 PC服务器端和android手机客户端socket通信问题
\u5b89\u5353\u57fa\u4e8esocket\u7684\u670d\u52a1\u5668\u901a\u4fe1\u4e3a\u4ec0\u4e48\u4e0d\u53ef\u4ee5\u8bd5\u4e00\u4e0b\u4e0d\u7528BufferedRead\uff0c\u800c\u662f\u76f4\u63a5\u4ecesocket\u7684InputStream\u8bfb\u6570\u636e\u3002
\u8fd9\u4e2a\u5e94\u5f53\u53ef\u4ee5\u7684
\u3000\u30001. PC\u670d\u52a1\u5668\u542f\u7528ServerSocket
\u3000\u3000\u4e24\u4e2a\u901a\u4fe1\u5b9e\u4f53\u5728\u5efa\u7acb\u865a\u62df\u94fe\u8def\u4e4b\u524d\uff0c\u9700\u8981\u6709\u4e00\u65b9\u5148\u51c6\u5907\u597d\uff0c\u4e3b\u52a8\u63a5\u53d7\u6765\u81ea\u5176\u4ed6\u901a\u4fe1\u5b9e\u4f53\u7684\u8fde\u63a5\u8bf7\u6c42\u3002
\u3000\u3000\u4f7f\u7528ServerSocket\u5bf9\u8c61\u76d1\u542c\u6765\u81ea\u5ba2\u6237\u7aef\u7684Socket\u8fde\u63a5\u3002
\u3000\u3000//\u521b\u5efaServerSocket\u5bf9\u8c61
ServerSocket ss = new ServerSocket(30000);
//\u76d1\u542c\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42
while(true){
Socket s = ss.accept();
\u2026
}
\u3000\u3000\u5982\u679c\u6ca1\u6709\u8fde\u63a5\uff0c\u5219\u5c06\u4e00\u76f4\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\u3002\u5f53\u63a5\u6536\u5230\u8fde\u63a5\u8bf7\u6c42\u540e\uff0c\u83b7\u53d6\u6d88\u606f\u5230\u8f93\u5165\u6d41\uff0c\u5e76\u4fdd\u5b58\u5230\u6587\u4ef6\u3002
\u3000\u3000//\u63a5\u6536\u5ba2\u6237\u7aef\u6d88\u606f
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
String str;
BufferedWriter bw = new BufferedWriter(new FileWriter("D:/ApInfo"+ (i++) +".txt"));
while ((str = in.readLine()) != null) {
System.out.println(str);
bw.write(str);
bw.newLine();
}
\u3000\u30002. Android\u7ec8\u7aef\u4f7f\u7528Socket\u901a\u4fe1
\u3000\u3000\u5ba2\u6237\u7aef\u4f7f\u7528Socket\u7684\u6784\u9020\u5668\u8fde\u63a5\u670d\u52a1\u5668\uff0c\u6307\u5b9a\u670d\u52a1\u5668IP\u548c\u7aef\u53e3\u53f7\u5c31\u53ef\u4ee5\u4e86\u3002
\u3000\u3000Socket s = new Socket(\u201c192.168.1.100\u201d, 30000);
\u3000\u3000\u8fd9\u6837\u670d\u52a1\u5668\u7aef\u7684accept()\u65b9\u6cd5\u5c31\u5f97\u5230\u54cd\u5e94\uff0c\u4ece\u800c\u5411\u4e0b\u6267\u884c\uff0c\u670d\u52a1\u5668\u7aef\u548c\u5ba2\u6237\u7aef\u5c31\u5f62\u6210\u4e86\u4e00\u5bf9\u4e92\u76f8\u8fde\u63a5\u7684Socket\u3002\u518d\u8fdb\u884c\u901a\u4fe1\u65f6\u5c31\u6ca1\u6709\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u4e4b\u5206\u4e86\uff0c\u90fd\u662f\u901a\u8fc7\u8f93\u5165\u8f93\u51fa\u6d41\u8fdb\u884c\u901a\u4fe1\u3002
\u3000\u3000\u8be6\u7ec6\u6b65\u9aa4\uff1a
\u3000\u3000\u91c7\u7528Handler\u548cTimerTask\u6765\u5b9a\u65f6\u626b\u63cfAP\u4fe1\u606f\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7aef\u3002TimerTask\u89c4\u5b9a\u4e86\u5230\u8fbe\u6307\u5b9a\u7684\u65f6\u95f4\u6240\u8981\u8fdb\u884c\u7684\u4efb\u52a1\u3002
\u3000\u3000TimerTask task = new TimerTask(){
public void run() {
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};
\u3000\u3000handler\u4f20\u9012message\u5185\u5bb9\uff1a
\u3000\u3000Handler handler = new Handler(){
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
// \u6267\u884c\u5b9a\u65f6\u5668\u65f6\u95f4\u5230\u4e86\u4e4b\u540e\u7531handler\u4f20\u9012\u7684\u4efb\u52a1
break;
}
super.handleMessage(msg);
}
}
\u3000\u3000\u63a5\u4e0b\u6765\u626b\u63cfAP\u4fe1\u606f\u5e76\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7aef\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u4fdd\u5b58\u3002
\u3000\u3000WifiManager wifiManager=(WifiManager) getSystemService(WIFI_SERVICE);
wifiManager.startScan();
mWifiList = wifiManager.getScanResults();
\u3000\u3000\u7531WifiManager\u8bf4\u660e\u53ef\u77e5\uff0c\u5b83\u53ef\u4ee5\u7528\u4e8e\u5904\u7406\u5df2\u914d\u7f6e\u7684\u7f51\u7edc\uff0c\u5f53\u524d\u8fde\u63a5\u7684\u7f51\u7edc\u53caAP\u4fe1\u606f\u7684\u626b\u63cf\u7b49\u60c5\u51b5\u3002
\u3000\u3000\u5411\u670d\u52a1\u5668\u53d1\u9001\u6d88\u606f\uff1a
\u3000\u3000socket = new Socket("192.168.1.211",30000);
//\u5411\u670d\u52a1\u5668\u7aef\u53d1\u9001\u6d88\u606f
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
out.println(message);
\u3000\u3000\u5176\u4e2dmessage\u4e3a\u83b7\u53d6\u7684AP\u4fe1\u606f\uff0c\u6d4b\u8bd5\u6536\u5230\u7684\u4fe1\u606f\u683c\u5f0f\u4e3a\uff1a
\u3000\u3000SSID: ICIS_LAB, BSSID: 1c:af:f7:9a:65:e4, capabilities: [WPA-PSK-TKIP+CCMP], level: -80,frequency: 2437
两个通信实体在建立虚拟链路之前，需要有一方先准备好，主动接受来自其他通信实体的连接请求。
使用ServerSocket对象监听来自客户端的Socket连接。
//创建ServerSocket对象
ServerSocket ss = new ServerSocket(30000);
//监听来自客户端的请求
while(true){
Socket s = ss.accept();
…
}
如果没有连接，则将一直处于等待状态。当接收到连接请求后，获取消息到输入流，并保存到文件。
//接收客户端消息
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
String str;
BufferedWriter bw = new BufferedWriter(new FileWriter("D:/ApInfo"+ (i++) +".txt"));
while ((str = in.readLine()) != null) {
System.out.println(str);
bw.write(str);
bw.newLine();
}
2. Android终端使用Socket通信
客户端使用Socket的构造器连接服务器，指定服务器IP和端口号就可以了。
Socket s = new Socket(“192.168.1.100”, 30000);
这样服务器端的accept()方法就得到响应，从而向下执行，服务器端和客户端就形成了一对互相连接的Socket。再进行通信时就没有服务器和客户端之分了，都是通过输入输出流进行通信。
详细步骤：
采用Handler和TimerTask来定时扫描AP信息并发送给服务器端。TimerTask规定了到达指定的时间所要进行的任务。
TimerTask task = new TimerTask(){
public void run() {
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};
handler传递message内容：
Handler handler = new Handler(){
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
// 执行定时器时间到了之后由handler传递的任务
break;
}
super.handleMessage(msg);
}
}
接下来扫描AP信息并发送给服务器端，然后将结果保存。
WifiManager wifiManager=(WifiManager) getSystemService(WIFI_SERVICE);
wifiManager.startScan();
mWifiList = wifiManager.getScanResults();
由WifiManager说明可知，它可以用于处理已配置的网络，当前连接的网络及AP信息的扫描等情况。
向服务器发送消息：
socket = new Socket("192.168.1.211",30000);
//向服务器端发送消息
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
out.println(message);
其中message为获取的AP信息，测试收到的信息格式为：
SSID: ICIS_LAB, BSSID: 1c:af:f7:9a:65:e4, capabilities: [WPA-PSK-TKIP+CCMP], level: -80,frequency: 2437
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