Question

我正在开发一个用于短信转发的WiFi应用程序。打开WiFi按钮并打开应用程序后，它会在相应的编辑框中显示像10.0.0.3这样的IP地址，端口号是33300。问题是当应用程序打开时，当我关闭WiFi按钮时，它应该显示为空但仍然显示IPAddress。当我打开WiFi按钮时，它应该再次显示IPAddress。如何在后台检查连续的WiFi地址并显示它在文本框中

public class WifiFragment  extends Fragment {
EditText et_portnumber,et_IpAddress;
int port=33300;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) 
        {

    View rootView = inflater.inflate(R.layout.wififragment, container, false);
    et_portnumber = (EditText) rootView.findViewById(R.id.etPortnumber);
    et_IpAddress= (EditText) rootView.findViewById(R.id.ipaddress);
    btn_serverOn=(Button)rootView.findViewById(R.id.btn_Ok);
    final String strgetIpdaddress= getIpAddress();
    et_IpAddress.setText(strgetIpdaddress);
    et_portnumber.setText(port);
            }
private String getIpAddress() {
    String ip = "";
    try {
        Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface
                .getNetworkInterfaces();
        while (enumNetworkInterfaces.hasMoreElements()) {
            NetworkInterface networkInterface = enumNetworkInterfaces   .nextElement();
            Enumeration<InetAddress> enumInetAddress = networkInterface
                    .getInetAddresses();
            while (enumInetAddress.hasMoreElements()) {
                InetAddress inetAddress = enumInetAddress.nextElement();
                if (inetAddress.isSiteLocalAddress()) {
                    ip =  inetAddress.getHostAddress() + "\n";
                    }
            }
        }
    } catch (SocketException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        ip += "Something Wrong! " + e.toString() + "\n";
        }
    return ip;
}

}

Answer 1

您应该注册广播接收器以侦听连接状态更改。然后，在您的广播接收器中，您可以轻松确定所连接的网络类型。从那里，如果您的条件得到满足，您可以发送您将在片段中收到的广播，然后您将显示IP地址或您想要的任何内容。您可以在此页面上找到所有相关信息：http://developer.android.com/training/monitoring-device-state/connectivity-monitoring.html

在android中如何在后台连续检查WiFi是否启用

1 个答案: