[ConnectivityManager] 네트워크 상태 확인 (Wifi, Mobile.. etc...)

1. Android에서 Network 상태를 확인 하는 샘플 코드

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import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo;   /**  * Android에서 Network 상태를 확인 하는 클래스  * @author dennis.seo  */ public class NetworkManager {              /**      * Check network connectivity (wi-fi)      * @param context      * @return connected state      */     public static boolean isWifiConnected(Context context) {         ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);         NetworkInfo activeNetworkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);         if(activeNetworkInfo != null && activeNetworkInfo.isAvailable() && activeNetworkInfo.isConnected()) return true;         return false;     }          /**      * Check network connectivity (mobile)      * @param context      * @return connected state      */     public static boolean isMobileConnected(Context context) {         ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);         NetworkInfo networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);         if(networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected()) return true;         return false;     }          /**      * Check network connectivity (mobile, wi-fi)      * @return connected state      */     public static boolean isOnline(Context context) { // network 연결 상태 확인         boolean connected = false;                  if(isWifiConnected(context))              return true;         if(isMobileConnected(context))             return true;                  return connected;     } }

2. 네트워크 상태 변화에 대한 BroadcastReceiver

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// BroadcastReceiver.onReceiver override @Override public void onReceiver(Context context, Intent intent) {     String action = intent.getAction();     if ( action.equals(ConnectivityManager.CONNECTIVITY_ACTION) ) {         // 네트워크에 변화가 생길때 마다 이 코드 안으로 들어온다.         // 여기에 하고 싶은 걸 넣으면 된다.      } }