102. (AndroidStudio/android/java) WifiInfo 및 DhcpInfo 사용해 현재 연결된 와이파이 (wifi) 정보 확인 실시

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[ 개발 환경 설정 ]

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개발 툴 : AndroidStudio

개발 언어 : java

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[소스 코드]

 

public void getWifiInfo(){
	try {

		/** [퍼미션 필요]
		 * <uses-permission android:name="android.permission.INTERNET" />
		 * <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
		 * */

		//TODO wifi 가 연결 되었는지 확인 실시
		ConnectivityManager manager = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
		boolean wificon = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected();

		if(wificon == false){ //TODO wifi 연걸이 안된 경우
			return;
		}
		//TODO wifi 정보 가져오기
		WifiManager wifimanager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
		WifiInfo wifiInfo = wifimanager.getConnectionInfo();

		DhcpInfo dhcpInfo = wifimanager.getDhcpInfo();
		int wIp = dhcpInfo.ipAddress;
		int wNetmask = dhcpInfo.netmask;
		int wGateway = dhcpInfo.gateway;
		int wDns1 = dhcpInfo.dns1;

		String ssid = wifiInfo.getSSID();
		ssid = ssid.replaceAll("[\"]","");
		String ip = String.format("%d.%d.%d.%d", (wIp & 0xff), (wIp >> 8 & 0xff), (wIp >> 16 & 0xff), (wIp >> 24 & 0xff));
		String subnet = String.format("%d.%d.%d.%d", (wNetmask & 0xff), (wNetmask >> 8 & 0xff), (wNetmask >> 16 & 0xff), (wNetmask >> 24 & 0xff));
		String gateway = String.format("%d.%d.%d.%d", (wGateway & 0xff), (wGateway >> 8 & 0xff), (wGateway >> 16 & 0xff), (wGateway >> 24 & 0xff));
		String dns1 = String.format("%d.%d.%d.%d", (wDns1 & 0xff), (wDns1 >> 8 & 0xff), (wDns1 >> 16 & 0xff), (wDns1 >> 24 & 0xff));

		Log.d("---","---");
		Log.w("//===========//","================================================");
		Log.d("","\n"+"[A_Wifi > getWifiInfo() 메소드 : 현재 연결된 와이파이 정보 확인 실시]");
		Log.d("","\n"+"[ssid : "+String.valueOf(ssid)+"]");
		Log.d("","\n"+"[ip : "+String.valueOf(ip)+"]");
		Log.d("","\n"+"[subnet : "+String.valueOf(subnet)+"]");
		Log.d("","\n"+"[gateway : "+String.valueOf(gateway)+"]");
		Log.d("","\n"+"[dns1 : "+String.valueOf(dns1)+"]");
		Log.w("//===========//","================================================");
		Log.d("---","---");
	}
	catch (Exception e){
		e.printStackTrace();
	}
}

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[결과 출력]

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