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POOverlay only draws line between first 2 GPS points in Android
 

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    <p>I am experiencing an unusual error using ItemizedOverlay in Android.</p> <p>I am creating a GPS tracking device that plots a route between waypoints stored in a database. </p> <p>When I provide the first two sets of longitude and latitude points through the emulator in Eclipse, it draws a red line just how I want it, but if I send another GPS point, it animates to the point, but does not draw a line from the last point.</p> <hr> <pre><code>public class MyOverlay extends ItemizedOverlay&lt;OverlayItem&gt; { // private Projection projection; private Paint linePaint; private Vector&lt;GeoPoint&gt; points; public MyOverlay(Drawable defaultMarker) { super(defaultMarker); points = new Vector&lt;GeoPoint&gt;(); //set colour, stroke width etc. linePaint = new Paint(); linePaint.setARGB(255, 255, 0, 0); linePaint.setStrokeWidth(3); linePaint.setDither(true); linePaint.setStyle(Style.FILL); linePaint.setAntiAlias(true); linePaint.setStrokeJoin(Paint.Join.ROUND); linePaint.setStrokeCap(Paint.Cap.ROUND); } public void addPoint(GeoPoint point) { points.addElement(point); } public void draw(Canvas canvas, MapView view, boolean shadow) { int size = points.size(); Point lastPoint = new Point(); if(size == 0) return; view.getProjection().toPixels(points.get(0), lastPoint); Point point = new Point(); for(int i = 1; i&lt;size; i++){ view.getProjection().toPixels(points.get(i), point); canvas.drawLine(lastPoint.x, lastPoint.y, point.x, point.y, linePaint); lastPoint = point; } } @Override protected OverlayItem createItem(int arg0) { // TODO Auto-generated method stub return null; } @Override public int size() { // TODO Auto-generated method stub return 0; } } </code></pre>
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    1. COCan you debug the canvas.drawLine(lastPoint.x, lastPoint.y, point.x, point.y, linePaint); part? How many times is it called? With which arguments?
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    2. COHow would I go about debugging it specifically using the Logcat?
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    3. COHey LodSnoutimus, could you post your working class? I am curious as to how you got this to work. Thanks.
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