Test of Point inside polygon in Android

Question

The other day I did a class in Java to calculate if a point(X,Y) is inside a polygon. (X and Y are double, because will be geo-coordinates).

I know that Java has the class Polygon, but I had to use Path2D and Point2D, because Polygon don't allow double's, just integers :(

Once I have the polygon done in Path2D, I used the method contains (Path2D had it), and my problem was solved.

But now, I want to import to Android, and the problem is here, because Path2D needs to import:

import java.awt.geom.Path2D;
import java.awt.geom.Point2D;

and in Android don't exist awt, so I can't use.

So, is there any class similar to Path2D that had contains method? or I have to calculate by myself?

Here is how I did in Java using Path2D:

private void ConstructPolygon(Vector<Point2D> coodinates)
{       
    this.polygon.moveTo(coodinates.get(0).getX(), coodinates.get(0).getY());        

    //System.out.println(coodinates.get(0).getX() + "   " + coodinates.get(0).getY());
    //System.out.println("asda");

    for(int i = 1; i < this.num_points; i++)
    {
        //System.out.println(coodinates.get(i).getX() + "   " + coodinates.get(i).getY());
        this.polygon.lineTo(coodinates.get(i).getX(), coodinates.get(i).getY());
    }
    this.polygon.closePath();
}
public boolean InsideCity(Point2D punto)
{
    return this.polygon.contains(punto);                
}

Answer 1

You can use Google Maps PolyUtil:

import com.google.maps.android.PolyUtil;

boolean inside = PolyUtil.containsLocation(new LatLng(...), poly, true);

Answer 2

Sorry @sromku I asked my self (I never used this type of things)

That's how I solved if anyone have the same question

Builder poly2 = new Polygon.Builder();
    for(int i = 0; i< xpoints.length;i++){
        poly2.addVertex(new Point(xpoints[i],ypoints[i]));
    }
    Polygon polygon2 = poly2.build();