How to ask multiple permissions at same time in Android Marshmelllow

Question

Following code having multiple permissions, My error is when ever onclick button it asking only one permission, and again i click means it asking another permission.

Answer 1

requestPermissions(new String[]{
                                Manifest.permission.READ_CONTACTS,
                                Manifest.permission.ACCESS_FINE_LOCATION},
                        ASK_MULTIPLE_PERMISSION_REQUEST_CODE);