Hello developers, Sorry for the inconvenience .. but am stuck up here for quite a while !!!
We have developed a GPS based app in which it record the user routes and show it on the map.......but Panning around on the map when reviewing my route is painfully slow, it takes at least 4 or 5 seconds for the map to respond the finger swipes...... Overridden the onDraw() method and drawing the lines to show the routes whenever we zoom on the map, the lat-long is again drawn by calling onDraw()(Overridden) method , which has the geopoints with lat- lon values, and thus it becomes very slower process to display the map .. is there any better way to do this so that panning becomes faster as in "MyTracks" Following is the code to draw the routes on map...........please look into it and guide me how can i make it more efficient so that the panning and zooming works well...... Kindly let us know if any difficulty in understanding the Q , i shall try to make simpler. thank u, regards Sheik Ahmed class PathOverlay extends Overlay{ public PathOverlay() { // TODO Auto-generated constructor stub geopoints=new ArrayList<GeoPoint>(); c.moveToFirst(); for (int i = 0; i <c.getCount() ; i++){ if(c.getDouble(c.getColumnIndex("latitude")) != 0.0 || c.getDouble(c.getColumnIndex("longitude"))!=0.0) { geopoints.add(getPoint(c.getDouble(c.getColumnIndex("latitude")) , c.getDouble(c.getColumnIndex("longitude")))); gps_status.add(Boolean.parseBoolean(c.getString(c.getColumnIndex("gps") ))); avgeSpeed_points.add(c.getFloat(9)); } c.moveToNext(); } } private GeoPoint getPoint(double lat, double lon) { return(new GeoPoint((int)(lat*1000000.0),(int) (lon*1000000.0))); } @Override public void draw(Canvas canvas, MapView mapView, boolean shadow) { // super.draw(canvas, mapView, shadow); mapView.getDrawingCache(); Paint paint_Line=new Paint(); //paint_Line.setColor(Color.RED); paint_Line.setARGB(255, 255, 0, 0); paint_Line.setStrokeWidth(3); paint_Line.setDither(true); paint_Line.setStyle(Style.FILL); paint_Line.setAntiAlias(true); paint_Line.setStrokeJoin(Paint.Join.ROUND); paint_Line.setStrokeCap(Paint.Cap.ROUND); mapView.postInvalidateDelayed(6000); for(int i=0;i<geopoints.size()-1;i++) { Point p1=new Point(); Point p2=new Point(); if((geopoints.get(i).getLatitudeE6()!=geopoints.get(i +1).getLatitudeE6()) && (geopoints.get(i).getLongitudeE6()! =geopoints.get(i+1).getLongitudeE6()) && gps_status.get(i+1)){ paint_Line.setColor(Color.BLUE); mapView.getProjection().toPixels(geopoints.get(i), p1); mapView.getProjection().toPixels(geopoints.get(i+1),p2); canvas.drawLine(p1.x,p1.y,p2.x,p2.y,paint_Line); } mapView.getProjection().toPixels(geopoints.get(i),p1); if(i==0){ canvas.drawBitmap(start, p1.x-2, p1.y-start.getHeight() +2, null); } if (i+1==geopoints.size()-1) { canvas.drawBitmap(finish, p1.x-2, p1.y- finish.getHeight()+2, null); } } } } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en