change format of tile/ enable downloading from internet tiles (for android)

git-svn-id: https://osmand.googlecode.com/svn/trunk@27 e29c36b1-1cfa-d876-8d93-3434fc2bb7b8

DataExtractionOSM/logging.properties

@@ -1,4 +1,4 @@
-.level = ERROR
+.level = SEVERE
 handlers=java.util.logging.ConsoleHandler
 
 # Set the default logging level for the logger named com.mycompany

DataExtractionOSM/src/com/osmand/Algoritms.java

@@ -1,6 +1,7 @@
 package com.osmand;
 
 import java.io.Closeable;
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -46,4 +47,17 @@ public class Algoritms {
 			log.warn("Closing stream warn", e);
 		}
 	}
+	
+	public static void updateAllExistingImgTilesToOsmandFormat(File f){
+		if(f.isDirectory()){
+			for(File c : f.listFiles()){
+				updateAllExistingImgTilesToOsmandFormat(c);
+			}
+		} else if(f.getName().endsWith(".png") || f.getName().endsWith(".jpg")){
+			f.renameTo(new File(f.getAbsolutePath() + ".tile"));
+		} else if(f.getName().endsWith(".andnav2")) {
+			f.renameTo(new File(f.getAbsolutePath().substring(0, f.getAbsolutePath().length() - ".andnav2".length()) + ".tile"));
+		}
+			
+	}
 }

DataExtractionOSM/src/com/osmand/DataExtraction.java

@@ -352,8 +352,10 @@ public class DataExtraction implements IMapLocationListener {
 	    final JTextField textField = new JTextField();
 	    final JButton button = new JButton();
 	    button.setText("Set town");
+
+	    
 	    panel.add(textField, BorderLayout.CENTER);
-	    panel.add(button, BorderLayout.EAST);
+	    panel.add(button, BorderLayout.WEST);
 	    
 	    content.add(panel, BorderLayout.NORTH);
 	    

DataExtractionOSM/src/com/osmand/DefaultLauncherConstants.java

@@ -24,6 +24,7 @@ public abstract class DefaultLauncherConstants {
 	public static int MAP_divNonLoadedImage = 8;
 	public static boolean loadMissingImages = true;
 	public static ITileSource MAP_defaultTileSource = TileSourceManager.getMapnikSource();
+	public static boolean showGPSCoordinates = true;
 	
 	
 	// Application constants
@@ -34,7 +35,7 @@ public abstract class DefaultLauncherConstants {
 	// Download manager tile settings
 	public static int TILE_DOWNLOAD_THREADS = 4;
 	public static int TILE_DOWNLOAD_SECONTS_TO_WORK = 25;
-	
+	public static final int TILE_DOWNLOAD_MAX_ERRORS = -1;	
 	
 	
 	

DataExtractionOSM/src/com/osmand/MapPanel.java

@@ -196,16 +196,27 @@ public class MapPanel extends JPanel implements IMapDownloaderCallback {
 	
 	
 
-	public String getFileForImage (int x, int y, int zoom){
+	
-		return map.getName() +"/"+zoom+"/"+(x) +"/"+y+".png";
+	public File getTilesLocation() {
+		return tilesLocation;
 	}
 	
-	public Image getImageFor(int x, int y, int zoom) throws IOException{
+	public void setTilesLocation(File tilesLocation) {
+		this.tilesLocation = tilesLocation;
+		prepareImage();
+	}
+	
+	 
+	public String getFileForImage (int x, int y, int zoom, String ext){
+		return map.getName() +"/"+zoom+"/"+(x) +"/"+y+ext+".tile";
+	}
+	
+	public Image getImageFor(int x, int y, int zoom, boolean loadIfNeeded) throws IOException{
 		if(map == null){
 			return null;
 		}
-		String file = getFileForImage(x, y, zoom);
+		String file = getFileForImage(x, y, zoom, map.getTileFormat());
-		if(!cache.containsKey(file)){
+		if(cache.get(file) == null){
 			File en = new File(tilesLocation, file);
 			if(cache.size() > 1000){
 				ArrayList<String> list = new ArrayList<String>(cache.keySet());
@@ -213,7 +224,8 @@ public class MapPanel extends JPanel implements IMapDownloaderCallback {
 					cache.remove(list.get(i));
 				}
 			}
-			if(en.exists() && !downloader.isFileCurrentlyDownloaded(en)){
+			if (!downloader.isFileCurrentlyDownloaded(en)) {
+				if (en.exists()) {
 					long time = System.currentTimeMillis();
 					try {
 						cache.put(file, ImageIO.read(en));
@@ -224,6 +236,13 @@ public class MapPanel extends JPanel implements IMapDownloaderCallback {
 						log.error("Eror reading png " + x + " " + y + " zoom : " + zoom, e);
 					}
 				} 
+				if(loadIfNeeded && cache.get(file) == null){
+					String urlToLoad = map.getUrlToLoad(x, y, zoom);
+					if (urlToLoad != null) {
+						downloader.requestToDownload(urlToLoad, new DownloadRequest(en, x, y, zoom));
+					}
+				}
+			}
 		}
 		
 		return cache.get(file);
@@ -239,7 +258,7 @@ public class MapPanel extends JPanel implements IMapDownloaderCallback {
 		if(request.zoom == this.zoom && 
 				(i >=0 && i<images.length) && (j>=0 && j< images[i].length)){
 			try {
-				images[i][j] = getImageFor(request.xTile, request.yTile, zoom);
+				images[i][j] = getImageFor(request.xTile, request.yTile, zoom, false);
 				repaint();
 			} catch (IOException e) {
 				log.error("Eror reading png " + request.xTile +" " + request.yTile + " zoom : " + zoom, e);
@@ -281,15 +300,7 @@ public class MapPanel extends JPanel implements IMapDownloaderCallback {
 				for (int j = 0; j < images[i].length; j++) {
 					int x= (int) xTileLeft + i;
 					int y = (int) yTileUp + j;
-					images[i][j] = getImageFor(x, y, zoom);
+					images[i][j] = getImageFor(x, y, zoom, loadNecessaryImages);
-					if(loadNecessaryImages &&  images[i][j] == null && map != null){
-						String urlToLoad = map.getUrlToLoad(x, y, zoom);
-						if(urlToLoad != null){
-							downloader.requestToDownload(urlToLoad, 
-									new DownloadRequest(new File(tilesLocation, getFileForImage(x, y, zoom)),
-											x, y, zoom));
-						}
-					}
 				}
 			}
 			
@@ -347,6 +358,12 @@ public class MapPanel extends JPanel implements IMapDownloaderCallback {
 	
 	public void setMapName(ITileSource map){
 		this.map = map;
+		if(map.getMaximumZoomSupported() < this.zoom){
+			zoom = map.getMaximumZoomSupported();
+		}
+		if(map.getMinimumZoomSupported() > this.zoom){
+			zoom = map.getMinimumZoomSupported();
+		}
 		prepareImage();
 	}
 	

DataExtractionOSM/src/com/osmand/MapTileDownloader.java

@@ -22,11 +22,16 @@ public class MapTileDownloader {
 	private static MapTileDownloader downloader = null;
 	private static Log log = LogFactory.getLog(MapTileDownloader.class);
 	
+	
 	private ThreadPoolExecutor threadPoolExecutor;
 	private IMapDownloaderCallback callback;
 	
 	private Set<File> currentlyDownloaded;
 	
+	private int currentErrors = 0;
+	
+	
+	
 	
 	public static MapTileDownloader getInstance(){
 		if(downloader == null){
@@ -97,6 +102,11 @@ public class MapTileDownloader {
 	}
 	
 	public void requestToDownload(String url, DownloadRequest request){
+		if(DefaultLauncherConstants.TILE_DOWNLOAD_MAX_ERRORS > 0 && 
+				currentErrors > DefaultLauncherConstants.TILE_DOWNLOAD_MAX_ERRORS){
+			return;
+		}
+		
 		if (!isFileCurrentlyDownloaded(request.fileToSave)) {
 			threadPoolExecutor.execute(new DownloadMapWorker(url, request));
 		}
@@ -147,8 +157,10 @@ public class MapTileDownloader {
 					callback.tileDownloaded(downloadUrl, request);
 				}
 			} catch (UnknownHostException e) {
+				currentErrors++;
 				log.error("UnknownHostException, cannot download tile " + downloadUrl, e);
 			} catch (IOException e) {
+				currentErrors++;
 				log.warn("Cannot download tile : " + downloadUrl, e);
 			}
 		} 

DataExtractionOSM/src/com/osmand/ToDoConstants.java

@@ -0,0 +1,14 @@
+package com.osmand;
+
+/**
+ * This class is designed to put all to do's and link them with code.
+ * The whole methods could be paste or just constants.
+ * Do not worry to put ugly code here (just a little piece)
+ *
+ */
+public class ToDoConstants {
+	
+	
+	public int CONFIG_COMMONS_LOGGING_IN_ANDROID = 1;
+
+}

DataExtractionOSM/src/com/osmand/map/TileSourceManager.java

@@ -72,9 +72,12 @@ public class TileSourceManager {
 			list.add(getCloudMadeSource());
 			list.add(getOpenPisteMapSource());
 			list.add(getGoogleMapsSource());
-			// TODO ?
+			list.add(getGoogleMapsSatelliteSource());
-//			list.add(getGoogleMapsSatelliteSource());
+			list.add(getGoogleMapsTerrainSource());
-//			list.add(getGoogleMapsTerrainSource());
+			list.add(getMicrosoftMapsSource());
+			list.add(getMicrosoftEarthSource());
+			list.add(getMicrosoftHybridSource());
+			
 		}
 		return list;
 		
@@ -112,11 +115,74 @@ public class TileSourceManager {
 	}
 	
 	public static TileSourceTemplate getGoogleMapsSatelliteSource(){
-		return new TileSourceTemplate("GoogleMaps Satellite", "http://khm1.google.com/kh/v=37&x={1}&y={2}&z={0}", ".png", 19, 0, 256, 18000);
+		return new TileSourceTemplate("GoogleMaps Satellite", "http://khm1.google.com/kh/v=59&x={1}&y={2}&z={0}", ".jpg", 20, 0, 256, 18000);
 	}
 	
 	public static TileSourceTemplate getGoogleMapsTerrainSource(){
-		return new TileSourceTemplate("GoogleMaps Terrain", "http://mt3.google.com/mt/v=w2.87&x={1}&y={2}&z={0}", ".png", 15, 0, 256, 18000);
+		return new TileSourceTemplate("GoogleMaps Terrain", "http://mt3.google.com/vt/v=w2p.111&hl=en&x={1}&y={2}&z={0}", ".jpg", 15, 0, 256, 18000);
 	}
 	
+	public static TileSourceTemplate getMicrosoftMapsSource(){
+		return new MicrosoftTileSourceTemplate("Microsoft Maps", 'r', "png", ".png", 19, 1, 256, 18000);
+	}
+	
+	public static TileSourceTemplate getMicrosoftEarthSource(){
+		return new MicrosoftTileSourceTemplate("Microsoft Earth", 'a', "jpg", ".jpg", 19, 1, 256, 18000);
+	}
+	
+	public static TileSourceTemplate getMicrosoftHybridSource(){
+		return new MicrosoftTileSourceTemplate("Microsoft Hybrid", 'h', "jpg", ".jpg", 19, 1, 256, 18000);
+	}
+	
+	
+	protected static final char[] NUM_CHAR = { '0', '1', '2', '3' };
+
+	/**
+	 * See: http://msdn.microsoft.com/en-us/library/bb259689.aspx
+	 * @param zoom
+	 * @param tilex
+	 * @param tiley
+	 * @return quadtree encoded tile number
+	 * 
+	 */
+	public static String encodeQuadTree(int zoom, int tilex, int tiley) {
+		char[] tileNum = new char[zoom];
+		for (int i = zoom - 1; i >= 0; i--) {
+			// Binary encoding using ones for tilex and twos for tiley. if a bit
+			// is set in tilex and tiley we get a three.
+			int num = (tilex % 2) | ((tiley % 2) << 1);
+			tileNum[i] = NUM_CHAR[num];
+			tilex >>= 1;
+			tiley >>= 1;
+		}
+		return new String(tileNum);
+	}
+	
+	public static class MicrosoftTileSourceTemplate extends TileSourceTemplate {
+
+		private final char mapTypeChar;
+		int serverNum = 0; // 0..3
+		protected String urlBase = ".ortho.tiles.virtualearth.net/tiles/";
+		protected String urlAppend = "?g=45";
+		private final String tileType;
+
+		public MicrosoftTileSourceTemplate(String name, char mapTypeChar , String type, 
+				String ext, int maxZoom, int minZoom, int tileSize, int avgSize) {
+			super(name, null, ext, maxZoom, minZoom, tileSize, avgSize);
+			this.mapTypeChar = mapTypeChar;
+			this.tileType = type;
+		}
+		
+		
+		@Override
+		public String getUrlToLoad(int x, int y, int zoom) {
+			String tileNum = encodeQuadTree(zoom, x, y);
+//			serverNum = (serverNum + 1) % serverNumMax;
+			return "http://" + mapTypeChar + serverNum + urlBase + mapTypeChar + tileNum + "."
+					+ tileType + urlAppend;
+			
+		}
+	}
+
+	
 }

OsmAnd/AndroidManifest.xml

@@ -20,4 +20,6 @@
 
 
 <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"></uses-permission>
+<uses-permission android:name="android.permission.INTERNET"></uses-permission>
+<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
 </manifest> 

OsmAnd/src/com/osmand/MapActivity.java

@@ -40,7 +40,7 @@ public class MapActivity extends Activity implements LocationListener, IMapLocat
 		
 		setContentView(R.layout.main);
 		mapView = (OsmandMapTileView) findViewById(R.id.View01);
-		mapView.setFileWithTiles(new File(Environment.getExternalStorageDirectory(), "osmand/tiles/Mapnik"));
+		mapView.setFileWithTiles(new File(Environment.getExternalStorageDirectory(), "osmand/tiles/"));
 		mapView.addMapLocationListener(this);
 		
 		ZoomControls zoomControls = (ZoomControls) findViewById(R.id.ZoomControls01);

OsmAnd/src/com/osmand/OsmandMapTileView.java

@@ -2,11 +2,15 @@ package com.osmand;
 
 
 import java.io.File;
+import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.WeakHashMap;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -15,23 +19,22 @@ import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.PointF;
 import android.graphics.Paint.Style;
+import android.os.Handler;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;
 
+import com.osmand.MapTileDownloader.DownloadRequest;
+import com.osmand.MapTileDownloader.IMapDownloaderCallback;
+import com.osmand.map.ITileSource;
 import com.osmand.osm.MapUtils;
 
-public class OsmandMapTileView extends View {
+public class OsmandMapTileView extends View implements IMapDownloaderCallback {
 
-	protected final int emptyTileDivisor = 4;
+	protected final int emptyTileDivisor = DefaultLauncherConstants.MAP_divNonLoadedImage;
 	protected final int maxImgCacheSize = 512;
 	
-	
+	protected static final Log log = LogFactory.getLog(OsmandMapTileView.class);
-	/**
-	 * tile size of map 
-	 */
-	private int tileSize = 256;
-	
 	/**
 	 * file or directory with tiles
 	 */
@@ -40,20 +43,22 @@ public class OsmandMapTileView extends View {
 	/**
 	 * zoom level
 	 */
-	private int zoom = 15;
+	private int zoom = DefaultLauncherConstants.MAP_startMapZoom;
 	
-	// degree measurements (-180, 180)
+	private double longitude = DefaultLauncherConstants.MAP_startMapLongitude;
-	// долгота
+
-	private double longitude = 27.56;
+	private double latitude = DefaultLauncherConstants.MAP_startMapLatitude;
-	// широта
+	
-	// degree measurements (90, -90)
+	// name of source map 
-	private double latitude = 53.9;
+	private ITileSource map = DefaultLauncherConstants.MAP_defaultTileSource;
 	
 	/**
 	 * listeners
 	 */
 	private List<IMapLocationListener> listeners = new ArrayList<IMapLocationListener>();
 	
+	private MapTileDownloader downloader = MapTileDownloader.getInstance();
+	
 	
 	// cached data to draw images
 	private Bitmap[][] images;
@@ -63,10 +68,19 @@ public class OsmandMapTileView extends View {
 	private int yStartingImage = 0;
 	
 	Map<String, Bitmap> cacheOfImages = new WeakHashMap<String, Bitmap>();
+	private PointF startDragging = null;
 	
 	Paint paintGrayFill;
 	Paint paintWhiteFill;
 	Paint paintBlack;
+	final Handler mHandler = new Handler();
+
+    // Create runnable for posting
+    final Runnable invalidateView = new Runnable() {
+        public void run() {
+            invalidate();
+        }
+    };
 	
 	
 	public OsmandMapTileView(Context context, AttributeSet attrs) {
@@ -94,14 +108,18 @@ public class OsmandMapTileView extends View {
 		
 		prepareImage();
 		setClickable(true);
+		downloader.setDownloaderCallback(this);
 	}
 	
 
-	private PointF startDragging = null;
+	public int getTileSize() {
+		return map == null ? 256 : map.getTileSize();
+	}
+	
 
 	public void dragTo(PointF p){
-		double dx = (startDragging.x - (double)p.x)/tileSize; 
+		double dx = (startDragging.x - (double)p.x)/getTileSize(); 
-		double dy = (startDragging.y - (double)p.y)/tileSize;
+		double dy = (startDragging.y - (double)p.y)/getTileSize();
 		this.latitude = MapUtils.getLatitudeFromTile(zoom, getYTile() + dy);
 		this.longitude = MapUtils.getLongitudeFromTile(zoom, getXTile() + dx);
 		prepareImage();
@@ -138,7 +156,7 @@ public class OsmandMapTileView extends View {
 	}
 	
 	protected void drawEmptyTile(Canvas cvs, int x, int y){
-		int tileDiv = tileSize / emptyTileDivisor;
+		int tileDiv = getTileSize() / emptyTileDivisor;
 		for (int k1 = 0; k1 < emptyTileDivisor; k1++) {
 			
 			for (int k2 = 0; k2 < emptyTileDivisor; k2++) {
@@ -160,21 +178,41 @@ public class OsmandMapTileView extends View {
 			for (int i = 0; i < images.length; i++) {
 				for (int j = 0; j < images[i].length; j++) {
 					if (images[i][j] == null) {
-						drawEmptyTile(canvas, i*tileSize+xStartingImage, j * tileSize + yStartingImage);
+						drawEmptyTile(canvas, i*getTileSize()+xStartingImage, j * getTileSize() + yStartingImage);
 					} else {
-						canvas.drawBitmap(images[i][j], i * tileSize + xStartingImage, j * tileSize + yStartingImage, null);
+						canvas.drawBitmap(images[i][j], i * getTileSize() + xStartingImage, j * getTileSize() + yStartingImage, null);
 					}
 				}
 			}
 		}
 		canvas.drawCircle(getWidth()/2, getHeight()/2, 3, paintBlack);
 		canvas.drawCircle(getWidth()/2, getHeight()/2, 6, paintBlack);
+		if (DefaultLauncherConstants.showGPSCoordinates) {
+			canvas.drawText(MessageFormat.format("Lat : {0}, lon : {1}, zoom : {2}", latitude, longitude, zoom), 0, 15, paintBlack);
+		}
 	}
 	
  
-	public Bitmap getImageFor(int x, int y) {
+	
-		String file = "/" + zoom + "/" + (x) + "/" + y + ".png";
+
-		if (!cacheOfImages.containsKey(file) && fileWithTiles != null) {
+	@Override
+	protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+		prepareImage();
+		super.onSizeChanged(w, h, oldw, oldh);
+	}
+	
+
+	public String getFileForImage (int x, int y, int zoom, String ext){
+		return map.getName() +"/"+zoom+"/"+(x) +"/"+y+ext+".tile";
+	}
+	
+	public Bitmap getImageFor(int x, int y, int zoom, boolean loadIfNeeded) {
+		if (map == null || fileWithTiles == null || !fileWithTiles.canRead()) {
+			return null;
+		}
+
+		String file = getFileForImage(x, y, zoom, map.getTileFormat());
+		if (cacheOfImages.get(file) == null) {
 			File en = new File(fileWithTiles, file);
 			if (cacheOfImages.size() > maxImgCacheSize) {
 				ArrayList<String> list = new ArrayList<String>(cacheOfImages.keySet());
@@ -184,39 +222,62 @@ public class OsmandMapTileView extends View {
 				}
 				System.gc();
 			}
-			if (en.exists() && en.canRead()) {
+			if (!downloader.isFileCurrentlyDownloaded(en)) {
+				if (en.exists()) {
+					long time = System.currentTimeMillis();
 					cacheOfImages.put(file, BitmapFactory.decodeFile(en.getAbsolutePath()));
-			} else {
+					if (log.isDebugEnabled()) {
-				cacheOfImages.put(file, null);
+						log.debug("Loaded file : " + file + " " + -(time - System.currentTimeMillis()) + " ms");
+					}
+				} 
+				if(loadIfNeeded && cacheOfImages.get(file) == null){
+					String urlToLoad = map.getUrlToLoad(x, y, zoom);
+					if (urlToLoad != null) {
+						downloader.requestToDownload(urlToLoad, new DownloadRequest(en, x, y, zoom));
+					}
+				}
 			}
 		}
 
 		return cacheOfImages.get(file);
 	}
 	
-
 	@Override
-	protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+	public void tileDownloaded(String dowloadedUrl, DownloadRequest request) {
-		prepareImage();
+		int tileSize = getTileSize();
-		super.onSizeChanged(w, h, oldw, oldh);
+		double xTileLeft = getXTile() - getWidth() / (2d * tileSize);
+		double yTileUp = getYTile() - getHeight() / (2d * tileSize);
+		int i = request.xTile - (int)xTileLeft;
+		int j = request.yTile - (int)yTileUp;
+		if(request.zoom == this.zoom && 
+				(i >= 0 && i < images.length) && (j >= 0 && j < images[i].length)) {
+			images[i][j] = getImageFor(request.xTile, request.yTile, zoom, false);
+			mHandler.post(invalidateView);
+		}
 	}
 	
-	// TODO async loading images (show busy cursor while it is loaded)
 	public void prepareImage(){
-		double xTileLeft = getXTile() - getWidth() / (2d * tileSize);
+		prepareImage(DefaultLauncherConstants.loadMissingImages);
-		double xTileRight = getXTile() + getWidth() / (2d * tileSize);
+	}
-		double yTileUp = getYTile() - getHeight() / (2d * tileSize);
-		double yTileDown = getYTile() + getHeight() / (2d * tileSize);
 	
-		xStartingImage = -(int) ((xTileLeft - Math.floor(xTileLeft)) * tileSize);
+	public void prepareImage(boolean loadNecessaryImages) {
-		yStartingImage = -(int) ((yTileUp - Math.floor(yTileUp)) * tileSize);
+		if (loadNecessaryImages) {
+			downloader.refuseAllPreviousRequests();
+		}
+		double xTileLeft = getXTile() - getWidth() / (2d * getTileSize());
+		double xTileRight = getXTile() + getWidth() / (2d * getTileSize());
+		double yTileUp = getYTile() - getHeight() / (2d * getTileSize());
+		double yTileDown = getYTile() + getHeight() / (2d * getTileSize());
+
+		xStartingImage = -(int) ((xTileLeft - Math.floor(xTileLeft)) * getTileSize());
+		yStartingImage = -(int) ((yTileUp - Math.floor(yTileUp)) * getTileSize());
 
 		int tileXCount = ((int) xTileRight - (int) xTileLeft + 1);
 		int tileYCount = ((int) yTileDown - (int) yTileUp + 1);
 		images = new Bitmap[tileXCount][tileYCount];
 		for (int i = 0; i < images.length; i++) {
 			for (int j = 0; j < images[i].length; j++) {
-				images[i][j] = getImageFor((int) xTileLeft + i, (int) yTileUp + j);
+				images[i][j] = getImageFor((int) xTileLeft + i, (int) yTileUp + j, zoom, loadNecessaryImages);
 			}
 		}
 		invalidate();
@@ -225,14 +286,31 @@ public class OsmandMapTileView extends View {
 	
 	
 	public void setZoom(int zoom){
+		if (map == null || (map.getMaximumZoomSupported() >= zoom && map.getMinimumZoomSupported() <= zoom)) {
 			this.zoom = zoom;
 			prepareImage();
 		}
+	}
 	
 	public File getFileWithTiles() {
 		return fileWithTiles;
 	}
 	
+	public ITileSource getMap() {
+		return map;
+	}
+	
+	public void setMap(ITileSource map) {
+		this.map = map;
+		if(map.getMaximumZoomSupported() < this.zoom){
+			zoom = map.getMaximumZoomSupported();
+		}
+		if(map.getMinimumZoomSupported() > this.zoom){
+			zoom = map.getMinimumZoomSupported();
+		}
+		prepareImage();
+	}
+	
 	public void setFileWithTiles(File fileWithTiles) {
 		this.fileWithTiles = fileWithTiles;
 		prepareImage();
@@ -257,9 +335,6 @@ public class OsmandMapTileView extends View {
 		return zoom;
 	}
 	
-	public int getTileSize() {
-		return tileSize;
-	}
 	
 
 	public void addMapLocationListener(IMapLocationListener l){