If Internet Available on device then which ( WiFi || Mobile Data )

Required both permission in AndroidManifest.xml :

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


Code Snippets :

ConnectivityManager connMgr =            (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
boolean isWifiConn          = networkInfo.isConnected();

networkInfo                  = connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
boolean isMobileConn = networkInfo.isConnected();

Log.d( "Alert " ,"Wifi connected: " + isWifiConn);
Log.d( "Alert ","Mobile connected: " + isMobileConn);