[Android] 인터넷 접속 체크

public boolean isOnline() {     ConnectivityManager cm =         (ConnectivityManager) 컨텍스트.getSystemService(Context.CONNECTIVITY_SERVICE);     NetworkInfo netInfo = cm.getActiveNetworkInfo();     if (netInfo != null && netInfo.isConnectedOrConnecting()) {         return true;     }     return false; }

권한 추가 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

출처 http://stackoverflow.com/questions/1560788/how-to-check-internet-access-on-android-inetaddress-never-timeouts