Checking Data Connection

You can check if the Data Connection is enabled or not on the device:

public boolean isDataConnectionAvailable(Context context){

        ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo info = connectivityManager.getActiveNetworkInfo();

        if(info == null)

            return false;

        return connectivityManager.getActiveNetworkInfo().isConnected();

 }

Permission:

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