Google Maps Android Set Visible Bounds -

firstly sorry english. try set exact visibile bounds in google maps android api. example map show america's region , user can't scroll map canada. when link can understand try do.i think can camerachangelistener , getting visible regions couldn't implement algorithm. can me ? http://sehirharitasi.ibb.gov.tr/

it not easy , link it's can work:

//when setup map:  map.setoncamerachangelistener(new oncamerachangelistener() {      @override      public void oncamerachange(cameraposition cameraposition) {          checkbounds();      }  }); 

and checkbounds function can either check if visible area inside allowed one:

public void checkbounds() {   //non ricostruire allowedbounds ogni volta, sono sempre gli stessi, fatti il build nell'oncreate   latlngbounds actualvisiblebounds = map.getprojection().getvisibleregion().latlngbounds;   if (allowedbounds.contains(actualvisiblebounds)){     return   }else{     map.animatecamera(cameraupdatefactory.newlatlngbounds(allowedbounds));   } } 

or can use center of viewport , check if inside allowed area (to allow bounding zooms)

public void checkbounds() {                 latlngbounds.builder builder = new latlngbounds.builder();                 builder.include(northeast);                 builder.include(southwest);                 final latlngbounds allowedbounds = builder.build();                  latlngbounds centro = map.getprojection().getvisibleregion().latlngbounds;                  if (allowedbounds.contains(centro.getcenter()))                         return;                 else {                         map.animatecamera(cameraupdatefactory.newlatlngzoom(defaultlatlng, zoomlevel));                 }                         }