MarkerInfoWindow.java

package org.osmdroid.views.overlay.infowindow;

import org.osmdroid.api.IMapView;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.Marker;
import org.osmdroid.views.overlay.infowindow.BasicInfoWindow;

import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;

/**
 * {@link org.osmdroid.views.overlay.infowindow.MarkerInfoWindow} is the default
 * implementation of {@link org.osmdroid.views.overlay.infowindow.InfoWindow} for a
 * {@link org.osmdroid.views.overlay.Marker}.
 *
 * It handles
 *
 * R.id.bubble_title          = {@link org.osmdroid.views.overlay.OverlayWithIW#getTitle()},
 * R.id.bubble_subdescription = {@link org.osmdroid.views.overlay.OverlayWithIW#getSubDescription()},
 * R.id.bubble_description    = {@link org.osmdroid.views.overlay.OverlayWithIW#getSnippet()},
 * R.id.bubble_image          = {@link org.osmdroid.views.overlay.Marker#getImage()}
 *
 * Description and sub-description interpret HTML tags (in the limits of the Html.fromHtml(String) API). 
 * Clicking on the bubble will close it. 
 *
 * <img alt="Class diagram around Marker class" width="686" height="413" src='./doc-files/marker-infowindow-classes.png' />
 *
 * @author M.Kergall
 */
public class MarkerInfoWindow extends BasicInfoWindow {

	protected Marker mMarkerRef; //reference to the Marker on which it is opened. Null if none.
	
	/**
	 * @param layoutResId layout that must contain these ids: bubble_title,bubble_description,
	 *                       bubble_subdescription, bubble_image
	 * @param mapView
     */
	public MarkerInfoWindow(int layoutResId, MapView mapView) {
		super(layoutResId, mapView);
		//mMarkerRef = null;
	}

	/**
	 * reference to the Marker on which it is opened. Null if none.
	 * @return
     */
	public Marker getMarkerReference(){
		return mMarkerRef;
	}
	
	@Override public void onOpen(Object item) {
		super.onOpen(item);
		
		mMarkerRef = (Marker)item;
		if (mView==null) {
			Log.w(IMapView.LOGTAG, "Error trapped, MarkerInfoWindow.open, mView is null!");
			return;
		}
		//handle image
		ImageView imageView = (ImageView)mView.findViewById(mImageId /*R.id.image*/);
		Drawable image = mMarkerRef.getImage();
		if (image != null){
			imageView.setImageDrawable(image); //or setBackgroundDrawable(image)?
			imageView.setVisibility(View.VISIBLE);
		} else
			imageView.setVisibility(View.GONE);
	}

	@Override public void onClose() {
		super.onClose();
		mMarkerRef = null;
		//by default, do nothing else
	}
	
}