Hi all,
I'm running 0.9 in Eclipse 3.3/ADT.
I have a very stripped down one-class app (converted from m5) which
ought to be
presenting a map (that works ok) and then drawing an overlay (it
doesn't).
In onCreate(), a simple overlay (TOverlay) is created and added to
_mapView.getOverlays().
Lastly, mapUpdateHandler.sendEmptyMessage() is called, which should
invalidate the mapView,
and hence cause the overlay to be drawn.
I've copied the code below, and then copied the manifest.
The code has a few System.out.println's to determine flow of control.
All these appear in the LogCat output except the one in the overlay:
"TOverlay.draw".
At the very end I've copied the LogCat output. One can see the
printlns:
09-09 15:18:06.332: INFO/System.out(695): o2:1
09-09 15:18:06.352: INFO/System.out(695): mUH:msg=101
09-09 15:18:06.352: INFO/System.out(695): mUH:101
09-09 15:18:06.352: INFO/System.out(695): o3: 1
But not the desired "TOverlay.draw"
Any suggestions will be greatly appreciated.
Thanks in advance,
Ken
-------------- Java ----------
package com.herenow.android.quester;
import java.util.List;
public class Quester extends MapActivity
{
private static final double INIT_CENTER_LAT = 42.3908245;
private static final double INIT_CENTER_LONG = -71.130993;
private MapView _mapView;
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
_mapView = new MapView(this, "dummyapikey");
GeoPoint p = new GeoPoint((int) (INIT_CENTER_LAT * 1000000),
(int) (INIT_CENTER_LONG * 1000000));
MapController mc = _mapView.getController();
TOverlay tOver = new TOverlay(_mapView);
List<Overlay> overlays = _mapView.getOverlays();
overlays.add(tOver);
mc.animateTo(p);
mc.setZoom(15);
setContentView(_mapView);
mapUpdateHandler.sendEmptyMessage(101);
List<Overlay> o2 = _mapView.getOverlays();
System.out.println("o2:"+o2.size());
}
private Handler mapUpdateHandler
= new Handler(){
@Override
public void handleMessage(Message msg) {
System.out.println("mUH:msg="+msg.what);
switch (msg.what) {
case 101:
// _mapView.invalidate();
_mapView.postInvalidate();
System.out.println("mUH:101");
break;
}
List <Overlay> o3 = _mapView.getOverlays();
System.out.println("o3: "+o3.size());
super.handleMessage(msg);
}
};
public class TOverlay extends Overlay
{
private Paint plotPaint = new Paint();
private MapView mapView;
public TOverlay(MapView mapView){
this.mapView = mapView;
plotPaint.setColor(Color.BLUE);
}
public synchronized void draw(Canvas canvas, boolean b)
{
super.draw(canvas, mapView, b);
System.out.println("TOverlay.draw");
int lat = (int)(INIT_CENTER_LAT*1E6);
int lng = (int)(INIT_CENTER_LONG*1E6);
GeoPoint geopoint = new GeoPoint(lat, lng);
Point screenCoords = new Point();
mapView.getProjection().toPixels(geopoint, screenCoords);
canvas.drawCircle(screenCoords.x, screenCoords.y, 12,
plotPaint);
}
}
public boolean isRouteDisplayed(){
return false;
}
}
--------------- Manifest -------------
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android";
package="com.herenow.android.quester">
<uses-permission android:name="android.permission.INTERNET" />
<application android:icon="@drawable/icon">
<activity android:name=".Quester" android:label="@string/
app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<uses-library android:name="com.google.android.maps" />
</application>
</manifest>
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