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OverlayManager.java
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OverlayManager.java
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package com.agilevent.hennepin;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Color;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import java.util.List;
import java.util.ArrayList;
public class OverlayManager {
private static final java.lang.String LOG_TAG = "Maps_OverlayManager";
List<ManagedOverlay> overlays = new ArrayList<ManagedOverlay>();
MapView mapView;
Context ctx;
/**
* Populates layers to the MapView.
* Overlayer not managed by OverlayManager will be untouched.
*/
public void populate() {
List<Overlay> mapoverlays = mapView.getOverlays();
List<Overlay> newoverlays = new ArrayList<Overlay>();
for (int i = 0; i < mapoverlays.size(); i++) {
Overlay overlay = mapoverlays.get(i);
if (!(overlay instanceof ManagedOverlay)) {
newoverlays.add(overlay);
}
}
for (int i = 0; i < overlays.size(); i++) {
ManagedOverlay overlay = overlays.get(i);
overlay.init();
newoverlays.add(overlay);
}
mapoverlays.clear();
mapoverlays.addAll(newoverlays);
mapView.invalidate();
}
public void close(){
for (ManagedOverlay managedOverlay : overlays) {
managedOverlay.close();
}
}
public Context getContext() {
return ctx;
}
public OverlayManager(Context ctx, MapView mapView) {
this.mapView = mapView;
this.ctx = ctx;
}
public ManagedOverlay createOverlay(String name, Drawable defaultMarker) {
ManagedOverlay overlay = new ManagedOverlay(this, name, defaultMarker);
overlays.add(overlay);
return overlay;
}
public ManagedOverlay createOverlay(Drawable defaultMarker) {
return createOverlay(null, defaultMarker);
}
public ManagedOverlay createOverlay(String name) {
return createOverlay(name, createDefaultMarker());
}
public ManagedOverlay createOverlay() {
return createOverlay(null, createDefaultMarker());
}
public boolean removeOverlay(ManagedOverlay overlay) {
if (overlay != null) {
this.overlays.remove(overlay);
return true;
} else {
return false;
}
}
public boolean removeOverlay(String name) {
ManagedOverlay o = getOverlay(name);
return removeOverlay(o);
}
public ManagedOverlay getOverlay(int i) {
if (overlays.size() >= i) {
return overlays.get(i);
} else {
return null;
}
}
public MapView getMapView() {
return mapView;
}
public ManagedOverlay getOverlay(String name) {
for (int i = 0; i < overlays.size(); i++) {
ManagedOverlay overlay = overlays.get(i);
if (name.equals(overlay.getName()))
return overlay;
}
return null;
}
protected Drawable createDefaultMarker() {
Bitmap bitmap = Bitmap.createBitmap(16, 16, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint p = new Paint();
p.setColor(Color.BLUE);
p.setAlpha(50);
p.setAntiAlias(true);
canvas.drawCircle(8, 8, 8, p);
BitmapDrawable bd = new BitmapDrawable(bitmap);
bd.setBounds(0, 0, bd.getIntrinsicWidth(), bd.getIntrinsicHeight());
return bd;
}
}