tricky Android Google Map zoom while maintaining center point -

it's not easy explaining problem try.

i have android googlemap, on top of it, have imageview positioned @ center @ times. if drag/pan map, pin in center of googlemap.

now, add marker, somewhere on map. want zoom such center point remains in center of map, , marker visible within map, , highest zoom level.

the problem if check if marker within boundaries of map or not, , keep zooming in/out till is, process repeat itself, i.e. trying zoom in , if marker became outside, zoom out.

the problem rely on oncamerachange listener keep calling everytime zoom in or out, hence, process of zooming in/out keep occuring indefinitely

journeygooglemap.setoncamerachangelistener(new oncamerachangelistener() {    @override    public void oncamerachange(final cameraposition position)    { 

basically, need function can provide center latlng , markerlatlng , automatically calculate latlngbounds making sure center within center of latlng bounds, , can use

public static cameraupdate newlatlngbounds (latlngbounds bounds, int width, int height, int padding) 

as shown in link below https://developers.google.com/maps/documentation/android/reference/com/google/android/gms/maps/cameraupdatefactory#newlatlngbounds(com.google.android.gms.maps.model.latlngbounds,int, int,int)

if need anymore clarification please tell me

you need calculate latlngbounds 2 points:

1. your marker position and
2. place on opposite side of current center.

the second calculated this:

latlng other = new latlng(2 * center.latitude - position.latitude, 2 * center.longitude - position.longitude); 

see latlngboundsutils.fromcenterandpositions general solution.