BasicInfoWindow.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.OverlayWithIW;

import android.content.Context;
import android.text.Html;
import android.text.Spanned;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

/**
 * {@link org.osmdroid.views.overlay.infowindow.BasicInfoWindow} is the default
 * implementation of {@link org.osmdroid.views.overlay.infowindow.InfoWindow} for an
 * {@link org.osmdroid.views.overlay.OverlayWithIW}.
 *
 * It handles a title, a description and a sub-description.
 * 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
 * @see Marker
 */
public class BasicInfoWindow extends InfoWindow {

	/**
	 * resource id value meaning "undefined resource id"
	 */
	public static final int UNDEFINED_RES_ID = 0;
	
	static int mTitleId=UNDEFINED_RES_ID, 
			mDescriptionId=UNDEFINED_RES_ID, 
			mSubDescriptionId=UNDEFINED_RES_ID, 
			mImageId=UNDEFINED_RES_ID; //resource ids

	private static void setResIds(Context context){
		String packageName = context.getPackageName(); //get application package name
		mTitleId = context.getResources().getIdentifier("id/bubble_title", null, packageName);
		mDescriptionId = context.getResources().getIdentifier("id/bubble_description", null, packageName);
		mSubDescriptionId = context.getResources().getIdentifier("id/bubble_subdescription", null, packageName);
		mImageId = context.getResources().getIdentifier("id/bubble_image", null, packageName);
		if (mTitleId == UNDEFINED_RES_ID || mDescriptionId == UNDEFINED_RES_ID 
				|| mSubDescriptionId == UNDEFINED_RES_ID || mImageId == UNDEFINED_RES_ID) {
			Log.e(IMapView.LOGTAG, "BasicInfoWindow: unable to get res ids in "+packageName);
		}
	}
	
	public BasicInfoWindow(int layoutResId, MapView mapView) {
		super(layoutResId, mapView);
		
		if (mTitleId == UNDEFINED_RES_ID)
			setResIds(mapView.getContext());
		
		//default behavior: close it when clicking on the bubble:
		mView.setOnTouchListener(new View.OnTouchListener() {
			@Override public boolean onTouch(View v, MotionEvent e) {
				if (e.getAction() == MotionEvent.ACTION_UP)
					close();
				return true;
			}
		});
	}
	
	@Override public void onOpen(Object item) {
		OverlayWithIW overlay = (OverlayWithIW)item;
		String title = overlay.getTitle();
		if (title == null)
			title = "";
		if (mView==null) {
			Log.w(IMapView.LOGTAG, "Error trapped, BasicInfoWindow.open, mView is null!");
			return;
		}
		TextView temp=((TextView)mView.findViewById(mTitleId /*R.id.title*/));

		if (temp!=null) temp.setText(title);
		
		String snippet = overlay.getSnippet();
		if (snippet == null)
			snippet = "";
		Spanned snippetHtml = Html.fromHtml(snippet);
		((TextView)mView.findViewById(mDescriptionId /*R.id.description*/)).setText(snippetHtml);
		
		//handle sub-description, hidding or showing the text view:
		TextView subDescText = (TextView)mView.findViewById(mSubDescriptionId);
		String subDesc = overlay.getSubDescription();
		if (subDesc != null && !("".equals(subDesc))){
			subDescText.setText(Html.fromHtml(subDesc));
			subDescText.setVisibility(View.VISIBLE);
		} else {
			subDescText.setVisibility(View.GONE);
		}

	}

	@Override public void onClose() {
		//by default, do nothing
	}
	
}