I seem to be having a problem with using ItemizedOverlay and
OveralyItems in it.
I can get the first overlayItem to appear on the map but not any items
after that.
Example of the code:
Java:
protected void myCalledFunction(Location myLoc) {
// TODO Auto-generated method stub
Markers usersMarker = new Markers(user,overview.this);
int lat,lon;
HttpEntity ser_resp;
String text;
/* Add my location to the list */
if (myLoc != null) {
GeoPoint myPoint = new GeoPoint(
(int) (myLoc.getLatitude() * 1E6),
(int) (myLoc.getLongitude() * 1E6));
mc.animateTo(myPoint);
OverlayItem itemMyself = new
OverlayItem(myPoint,getString(R.string.myPosition),getString(R.string.myPosition));
itemMyself.setMarker(this.icon);
usersMarker.addOverlay(itemMyself);
}
if (this.userid != -1) {
Map<String, String> data = new HashMap<String,
String>();
data.put("userid", this.userid.toString());
try {
HttpResponse re = Registration.doPost("http://
www.android-town.com/getCloseUsers.php",data);
ser_resp = re.getEntity();
InputStream is = ser_resp.getContent();
BufferedInputStream bis = new
BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(20);
int current = 0;
while((current = bis.read()) != -1){
baf.append((byte)current);
}
/* Convert the Bytes read to a String. */
text = new String(baf.toByteArray());
/* If the web service returns nearby users... */
if (text != "") {
if (text.indexOf("##")>0) {
String[] users = text.split("##");
for (String user : users) {
String[] userData = user.split(";");
lat = Integer.valueOf(userData[1]);
lon = Integer.valueOf(userData[2]);
Log.e("overview", "username:
"+userData[0]+", lat: "+userData[1]+", lon: "+userData[2]);
GeoPoint p = new GeoPoint(
(int) (lat * 1E6),
(int) (lon * 1E6));
OverlayItem item = new
OverlayItem(p,userData[0],userData[3]);
item.setMarker(this.user);
usersMarker.addOverlay(item);
}
} else {
String[] userData = text.split(";");
lat = Integer.valueOf(userData[1]);
lon = Integer.valueOf(userData[2]);
Log.e("overview", "username: "+userData[0]+",
lat: "+userData[1]+", lon: "+userData[2]);
GeoPoint p = new GeoPoint(
(int) (lat * 1E6),
(int) (lon * 1E6));
OverlayItem item = new
OverlayItem(p,userData[0],userData[3]);
item.setMarker(this.user);
usersMarker.addOverlay(item);
}
}
} catch (ClientProtocolException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
getString(R.string.noURLAccess), Toast.LENGTH_SHORT).show();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
getString(R.string.noURLAccess), Toast.LENGTH_SHORT).show();
}
}
/* Draw markers */
//mc.setZoom(16);
Log.e("overlays","items: "+String.valueOf(usersMarker.size())+",
overlays: "+String.valueOf(mapOverlays.size()));
if (mapOverlays.size() == 0) {
mapOverlays.add(usersMarker);
} else {
mapOverlays.clear();
mapOverlays.add(usersMarker);
}
karta.invalidate();
}
and my implementation of the ItemizedOverlay class:
Java:
public class Markers extends ItemizedOverlay {
private Context ctx;
private ArrayList<OverlayItem> mOverlays = new
ArrayList<OverlayItem>();
public Markers(Drawable defaultMarker, Context cont) {
super(boundCenterBottom(defaultMarker));
this.ctx = cont;
// TODO Auto-generated constructor stub
}
@Override
protected OverlayItem createItem(int i) {
// TODO Auto-generated method stub
return mOverlays.get(i);
}
@Override
public boolean onTap(GeoPoint p, MapView mapView) {
// TODO Auto-generated method stub
return super.onTap(p, mapView);
}
@Override
protected boolean onTap(int index) {
// TODO Auto-generated method stub
Toast.makeText(this.ctx,
mOverlays.get(index).getTitle().toString()+", Latitude:
"+mOverlays.get(index).getPoint().getLatitudeE6(),
Toast.LENGTH_SHORT).show();
return super.onTap(index);
}
@Override
public int size() {
// TODO Auto-generated method stub
return mOverlays.size();
}
public void addOverlay(OverlayItem item) {
mOverlays.add(item);
setLastFocusedIndex(-1);
populate();
}
public void clear() {
mOverlays.clear();
setLastFocusedIndex(-1);
populate();
}
}
the first marker shows up on the map but if I add any more they don't
show up? Is there a problem with the populate() method? I tried
calling it manually after adding all markers but it still didn't help.
Please, if you have any idea what could be wrong, say so.
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