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    <p>Answers given below :</p> <p>1) Here's a solution that I used :</p> <pre><code>/** Called when the activity is first created. */ private List&lt;Overlay&gt; mapOverlays; private Projection projection; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); linearLayout = (LinearLayout) findViewById(R.id.zoomview); mapView = (MapView) findViewById(R.id.mapview); mapView.setBuiltInZoomControls(true); mapOverlays = mapView.getOverlays(); projection = mapView.getProjection(); mapOverlays.add(new MyOverlay()); } @Override protected boolean isRouteDisplayed() { return false; } class MyOverlay extends Overlay{ public MyOverlay(){ } public void draw(Canvas canvas, MapView mapv, boolean shadow){ super.draw(canvas, mapv, shadow); Paint mPaint = new Paint(); mPaint.setDither(true); mPaint.setColor(Color.RED); mPaint.setStyle(Paint.Style.FILL_AND_STROKE); mPaint.setStrokeJoin(Paint.Join.ROUND); mPaint.setStrokeCap(Paint.Cap.ROUND); mPaint.setStrokeWidth(2); GeoPoint gP1 = new GeoPoint(19240000,-99120000); GeoPoint gP2 = new GeoPoint(37423157, -122085008); Point p1 = new Point(); Point p2 = new Point(); Path path = new Path(); Projection projection.toPixels(gP1, p1); projection.toPixels(gP2, p2); path.moveTo(p2.x, p2.y); path.lineTo(p1.x,p1.y); canvas.drawPath(path, mPaint); } </code></pre> <p>courtesy: <a href="https://stackoverflow.com/questions/2176397/drawing-a-line-path-on-google-maps">Drawing a line/path on Google Maps</a></p> <p>2) Here's what worked for me :</p> <pre><code>createMarkers() { for(elem:bigList) { GeoPoint geoPoint = new GeoPoint((int)(elem.getLat()*1000000), (int) (elem.getLon()*1000000)); OverlayItem overlayItem = new OverlayItem(geoPoint, elem.getName(), elem.getData()); itemizedOverlay.addOverlay(overlayItem); } itemizedOverlay.populateNow(); mapOverlays.add(itemizedOverlay); //outside of for loop } </code></pre> <p>and in MyOverlay: </p> <pre><code>public void addOverlay(OverlayItem overlay) { m_overlays.add(overlay); } public void populateNow() { populate(); } </code></pre> <p>courtesy: stackoverflow.com unknown link</p> <p>3) The best way is to use a timer class. A very detailed description of the timer class and how to use it is given at this link :</p> <p><a href="http://life.csu.edu.au/java-tut/essential/threads/timer.html" rel="nofollow noreferrer">http://life.csu.edu.au/java-tut/essential/threads/timer.html</a></p> <p>4) I used this code :</p> <pre><code>if(!mapOverlays.isEmpty()) { mapOverlays.clear(); mapView.invalidate(); } </code></pre> <p>Hope these answers help atleast one other person. Thanks.</p>
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    1. POEfficient Map Overlays in Android Google Map
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    1. COYou should provide your solution in a separate answer and not in comments. It's better for everybody and it enables you to use formatting for the code.
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      1. USCatalin Morosan
    2. COYou are the man. I was having a task for plotting 200/300 pins on map, and i was having trouble of not having Smoothness. So during my R&D, i came across this article and you are the man. Thank you so much. **Solution for plotting multiple pins on MapView** is step-2
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    3. CO@PareshMayani : Glad that it helped :)
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