I'm trying to lock the camera so that the users can't move the map. Is there any method available for that? I tried to find it, but untill now I haven't found it yet. I also tried to find any related question for this.
Use
mapFragment.getMap().getUiSettings().setScrollGesturesEnabled(false);
to forbid map scrolling.
You can also use setAllGesturesEnabled(false); (there are also rotate and tilt gestures...) For more methods see docs: https://developers.google.com/android/reference/com/google/android/gms/maps/UiSettings