How to use

fromPixels

method

in

com.google.android.gms.maps.Projection

 Projection projection = map.getProjection();
projection.toPixels(geoPointBefore, pt);
geoPointAfter = projection.fromPixels(pt.x, pt.y);

int diffLatitude  = geoPointBefore.getLatitudeE6()  - geoPointAfter.getLatitudeE6();
int diffLongitude = geoPointBefore.getLongitudeE6() - geoPointAfter.getLongitudeE6();
...
...
...
// Add the difference to GeoPoint objects after conversion `fromPixels`

private void pathBuild(){
 path.rewind(); 
 if(mp.getPoints() == null || mp.getPoints().size() < 2) return;
 Projection projection = mapView.getProjection();
 pathInitialLonSpan = projection.fromPixels(0,mapView.getHeight()/2).getLongitudeE6() - 
     projection.fromPixels(mapView.getWidth(),mapView.getHeight()/2).getLongitudeE6();
 projection.toPixels(mp.getPoints().get(0), pathInitialPoint);
 path.moveTo(pathInitialPoint.x,pathInitialPoint.y); 
 for(int i=1; i<mp.getPoints().size(); i++){
   projection.toPixels(mp.getPoints().get(i), p1);
   int distance2 = (pPrev.x - p1.x) * (pPrev.x - p1.x) + (pPrev.y - p1.y) * (pPrev.y - p1.y); 
   if(distance2 > 9){
     path.lineTo(p1.x,p1.y);
     pPrev.set(p1.x, p1.y);
   }
 }

private void pathBuild(){
 path.rewind(); 
 if(mp.getPoints() == null || mp.getPoints().size() < 2) return;
 Projection projection = mapView.getProjection();
 pathInitialLonSpan = projection.fromPixels(0,mapView.getHeight()/2).getLongitudeE6() - 
     projection.fromPixels(mapView.getWidth(),mapView.getHeight()/2).getLongitudeE6();
 projection.toPixels(mp.getPoints().get(0), pathInitialPoint);
 path.moveTo(pathInitialPoint.x,pathInitialPoint.y); 
 for(int i=1; i<mp.getPoints().size(); i++){
   projection.toPixels(mp.getPoints().get(i), p1);
   int distance2 = (pPrev.x - p1.x) * (pPrev.x - p1.x) + (pPrev.y - p1.y) * (pPrev.y - p1.y); 
   if(distance2 > 9){
     path.lineTo(p1.x,p1.y);
     pPrev.set(p1.x, p1.y);
   }
 }

 Projection pj = mapView.getProjection();
Point pix = pj.toPixels(p);
pix.y -= 10; //10 pixels up
GeoPoint p2 = pj.fromPixels(pix2.x, pix2.y);
double offset = p2.getLatitude() - p.getLatitude();

getController().animateTo(projection.fromPixels(newCenter.x, newCenter.y));

 public static void panMap (int x, int y, MapView map) {
  Point ptPixels = new Point();
  GeoPoint geoPt = map.getMapCenter();
  Projection projection = map.getProjection();
  projection.toPixels(geoPt, ptPixels);
  ptPixels.x += x;
  ptPixels.y += y;
  geoPt = projection.fromPixels(ptPixels.x, ptPixels.y);
  map.getController().animateTo(geoPt);
}

 @Override
public void draw(Canvas canvas, MapView mapview, boolean shadow) {
  super.draw(canvas, mapview, shadow);
  if(shadow) return;
  if(mp.getPoints() == null || mp.getPoints().size() < 2) return;

  Projection projection = mapview.getProjection();
  int lonSpanNew = projection.fromPixels(0,mapview.getHeight()/2).getLongitudeE6() - 
      projection.fromPixels(mapview.getWidth(),mapview.getHeight()/2).getLongitudeE6();
  if(lonSpanNew != pathInitialLonSpan)
    pathBuild();
  else{ //check if path need to be offset
    projection.toPixels(mp.getPoints().get(0), p1);
    if(p1.x != pathInitialPoint.x || p1.y != pathInitialPoint.y){
      path.offset(p1.x - pathInitialPoint.x, p1.y - pathInitialPoint.y);
      pathInitialPoint.x = p1.x;
      pathInitialPoint.y = p1.y;
    }

  }
  canvas.drawPath(path, paint); 
}

 @Override
public void draw(Canvas canvas, MapView mapview, boolean shadow) {
  super.draw(canvas, mapview, shadow);
  if(shadow) return;
  if(mp.getPoints() == null || mp.getPoints().size() < 2) return;

  Projection projection = mapview.getProjection();
  int lonSpanNew = projection.fromPixels(0,mapview.getHeight()/2).getLongitudeE6() - 
      projection.fromPixels(mapview.getWidth(),mapview.getHeight()/2).getLongitudeE6();
  if(lonSpanNew != pathInitialLonSpan)
    pathBuild();
  else{ //check if path need to be offset
    projection.toPixels(mp.getPoints().get(0), p1);
    if(p1.x != pathInitialPoint.x || p1.y != pathInitialPoint.y){
      path.offset(p1.x - pathInitialPoint.x, p1.y - pathInitialPoint.y);
      pathInitialPoint.x = p1.x;
      pathInitialPoint.y = p1.y;
    }

  }
  canvas.drawPath(path, paint); 
}

GeoPoint target = projection.fromPixels(p.x, p.y);

GeoPoint target = projection.fromPixels(p.x, p.y);

mapStartPosition = projection.fromPixels(0, 0);

Projection proj = map.getProjection();
Point startPoint = proj.toPixels(marker.getPosition(), null);
final IGeoPoint startGeoPoint = proj.fromPixels(startPoint.x, startPoint.y);
final long duration = 500;
final Interpolator interpolator = new LinearInterpolator();