Itemized Overlays...Not drawing a collection but refreshing????

by Scott » Fri, 23 Apr 2010 08:05:14 GMT


Sponsored Links
 'm trying to write code that draws accuracy circles around a gps
location based on a time param. I have no problem setting up the GPS,
or of calculating how to draw the circles...What's been killing me is
that the Overlays always overwrite one another...So I can never have
more than one circle...I've looked at all the examples and tutorials
online but they seem to be obsessed with putting in icons or with
Drawing from some database or array...If I understood correctly I
should be able to do itemizedoverlays and just draw as i go without
having to track each readout in an array....HELP WHAT AM I DOING
WRONG? PS This code also crashes if I touch the map now.

MY CLASS
public class HelloItemizedOverlay extends ItemizedOverlay {
private List items;
private Drawable marker;
public HelloItemizedOverlay() {
super(null);
items = new ArrayList();
}
@Override
protected OverlayItem createItem(int index) {
return (OverlayItem)items.get(index);
}
@Override
public int size() {
return items.size();
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow)
{
super.draw(canvas, mapView, shadow);
if (TempLat > 0) {
Point center = new Point();
Point left = new Point();
Point screenPts = new Point();
Projection projection = mapView.getProjection();
float[] result = new float[1];
Location.distanceBetween(TempLat, TempLon, TempLat,
TempLon +1, result);
float longitudeLineDistance = result[0];
GeoPoint leftGeo = new GeoPoint((int)(TempLat*1e6),(int)
((TempLon-TempAccy/longitudeLineDistance)*1e6));
projection.toPixels(leftGeo, left);
projection.toPixels(p, center);
int radius = center.x - left.x;
accuracyPaint.setAntiAlias(true);
accuracyPaint.setStrokeWidth(2.0f);
accuracyPaint.setColor(0xff6666ff);
accuracyPaint.setStyle(Style.STROKE);
canvas.drawCircle(center.x, center.y, radius,
accuracyPaint);
accuracyPaint.setColor(0x186666ff);
accuracyPaint.setStyle(Style.FILL);
canvas.drawCircle(center.x, center.y, radius,
accuracyPaint);
}
}
public void addItem(OverlayItem item) {
items.add(item);
populate();
}
}

MY ONCREATE INITIALIZATION CALL

super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.myGMap);
LinearLayout zoomLayout = (LinearLayout)findViewById(R.id.zoom);
View zoomView = mapView.getZoomControls();
mapView.setSatellite(true);
zoomLayout.addView(zoomView,
new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
mapView.displayZoomControls(true);
mc = mapView.getController();
mc.setZoom(1;
accuracyPaint = new Paint();
overlay = new HelloItemizedOverlay();
......

MY ONLOCATIONCHANGED EVENT

public void onLocationChanged(Location location) {
MSGSTXT.setText("Location Found...");
TempTime = location.getTime();
TempLat = location.getLatitude();
TempLon = location.getLongitude();
TempAccy = location.getAccuracy();
TempSpeed = location.getSpeed();
TempBear = location.getBearing();
TempAlt = location.getAltitude();
p = new GeoPoint(
(int) (TempLat * 1E6),
(int



Other Threads

1. Unboxing X10

Ehemmm :p

@lutfihidayatr ~
imagine when information is all in your hand,
it's google~




Si putih

Venomously Brilliant
Cyanogen Mod

-- 
"Indonesian Android Community [id-android]"

2. HTC Sense UI on Dream

Hi semua, saya newbi banget nih di sini baru make htc g1, nah saya tuh mau
tanya .. mungkin ga di g1 saya bisa dipasangin sense UI kaya di hero gitu?
Jd ada weathernya, trs sm widget2 yg lain gitu.. btw beda eclair sama 1.6
apa aja yah... makasih :)

Sent from my HTC Dream via Matrix Indosat

-- 
"Indonesian Android Community [id-android]" 

3. Compiling fails for Webkit instrumentation flag WEBCORE_INSTRUMENTATION

4. Google Map di Milestone Android 2.1

5. Root lg gw620

6. How to display 'Column title' on the top of List ?

7. Down Tab Bar in Android