Draw smooth line between geopoints on android

I've drawed line between geopoints. its successfully drawed. when we see the map, the drawline look like pixelated when adjecent of next drawling. how to merge the line?

My code is here,

@Override
public void draw(Canvas canvas, MapView mapview, boolean shadow) {
    super.draw(canvas, mapview, shadow);
    if(! routeIsActive) return;

    mapview.getProjection().toPixels(locpoint, pp);       // Converts GeoPoint to screen pixels

    int xoff = 0;
    int yoff = 0;
    int oldx = pp.x;
    int oldy = pp.y;
    int newx = oldx + xoff;
    int newy = oldy + yoff;

    paint.setAntiAlias(true);
    paint.setDither(true);
            paint.setStrokeWidth(7);
    for(int i=0; i<numberRoutePoints-1; i++)
    {
        switch(routeMode.get(i))
        {
        case 0:
            paint.setColor(Color.parseColor("#666666"));
            break;
        case 1:
            paint.setColor(Color.parseColor("#0EA7D6"));
            break;
        case 2:
            paint.setColor(Color.parseColor("#654321"));
            break;
        case 3:
            paint.setColor(Color.parseColor("#123456"));
            break;
        }   

        mapview.getProjection().toPixels(routePoints.get(i), pold);
        oldx = pold.x;
        oldy = pold.y;
        mapview.getProjection().toPixels(routePoints.get(i+1), pnew);
        newx = pnew.x;
        newy = pnew.y;

        canvas.drawLine(oldx, oldy, newx, newy, paint);
    }

}