Just like Risadinha mentioned, you can easily achieve that with android-maps-utils. Just add:
compile 'com.google.maps.android:android-maps-utils:0.4.4'
to your gradle dependencies, use the following code:
public LatLngBounds toBounds(LatLng center, double radiusInMeters) {
double distanceFromCenterToCorner = radiusInMeters * Math.sqrt(2.0);
LatLng southwestCorner =
SphericalUtil.computeOffset(center, distanceFromCenterToCorner, 225.0);
LatLng northeastCorner =
SphericalUtil.computeOffset(center, distanceFromCenterToCorner, 45.0);
return new LatLngBounds(southwestCorner, northeastCorner);
}
EDIT:
Our goal is to calculate two points (LatLngs):
southwestCorner
and
northeastCorner
From the javadoc of the SphericalUtil you can read that 225 and 45 are heading values, and the distanceFromCenterToCorner is the distance. Further explanation of the values in the picture below:
