WIFI项目--Android 获取本机IP（wifi下），子网掩码，网关，dns等信息

近期在捣鼓一个小项目，利用wifi热点在两手机上传输文件。进度有点慢，下面是遇到的一些小问题：
1获取手机所连接的wifi路由器ip：

ublic class MainActivity extends Activity {      private WifiManager my_wifiManager;      private WifiInfo wifiInfo;      private DhcpInfo dhcpInfo;      private TextView tvResult;      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          my_wifiManager = ((WifiManager) getSystemService("wifi"));          dhcpInfo = my_wifiManager.getDhcpInfo();          wifiInfo = my_wifiManager.getConnectionInfo();          tvResult = (TextView) findViewById(R.id.tvResult);      }      @Override      protected void onResume() {          super.onResume();          StringBuilder sb = new StringBuilder();          sb.append("网络信息：");          sb.append("\nipAddress：" + intToIp(dhcpInfo.ipAddress));          sb.append("\nnetmask：" + intToIp(dhcpInfo.netmask));          sb.append("\ngateway：" + intToIp(dhcpInfo.gateway));          sb.append("\nserverAddress：" + intToIp(dhcpInfo.serverAddress));          sb.append("\ndns1：" + intToIp(dhcpInfo.dns1));          sb.append("\ndns2：" + intToIp(dhcpInfo.dns2));          sb.append("\n");          System.out.println(intToIp(dhcpInfo.ipAddress));          System.out.println(intToIp(dhcpInfo.netmask));          System.out.println(intToIp(dhcpInfo.gateway));          System.out.println(intToIp(dhcpInfo.serverAddress));          System.out.println(intToIp(dhcpInfo.dns1));          System.out.println(intToIp(dhcpInfo.dns2));          System.out.println(dhcpInfo.leaseDuration);          sb.append("Wifi信息：");          sb.append("\nIpAddress：" + intToIp(wifiInfo.getIpAddress()));          sb.append("\nMacAddress：" + wifiInfo.getMacAddress());          tvResult.setText(sb.toString());      }      private String intToIp(int paramInt) {          return (paramInt & 0xFF) + "." + (0xFF & paramInt >> 8) + "." + (0xFF & paramInt >> 16) + "."                  + (0xFF & paramInt >> 24);      }  }

项目思路：
思路一：手机A在创建热点后，开启tcp服务等待请求，手机B连上手机A的wifi热点后，B向A发送上线请求（单播）。

思路二：1.开启热点一方使用开启udp监听请求，并且发送上线请求（广播）；接下来连上该热点的手机同样采用这个方式，1监听–2广播；这样的好处是大家都知道对方的存在，是真正意义的群聊。2.发送文件阶段，发送方A先向接收方B方发送文件的数量以及名称等参数，发送方A并建立TCP服务等待请求，接收方发送N个数量的请求，发送方A相应创建N个线程发送文件。

今天先写这么多。。。看看资料先