ConnectivityManager

 

private ConnectivityManager internet; 

private Toast message;

 

message = Toast.makeText(this,"", Toast.LENGTH_LONG);

message.setGravity(Gravity.CENTER_VERTICAL, 0, 100);

 

internet = (ConnectivityManager)getSystemService(CONNECTIVITY_SERVICE);

 

if(internet.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState()==NetworkInfo.State.CONNECTED)

{

          message.setText("3G 연결되지 않음");message.show();

}

else if(internet.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTING)

{

         message.setText("WIFI 연결되지 않음");message.show();

}

else

{

         message.setText("인터넷에 연결되어있음");message.show();

}

 

 

*AndroidManifest.xml 퍼미션 추가

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