I'm loading tiles from asstets, these is my code, which initialize map:
mapView = (MapView)findViewById(R.id.offline_map_view);
mapView.setClickable(true);
mapView.setBuiltInZoomControls(false);
mapView.setMaxZoomLevel(macroZoomLevel);
mapView.setMinZoomLevel(macroZoomLevel);
mapView.getController().setZoom(macroZoomLevel); //set initial zoom-level, depends on your need
mapView.setTileSource(new XYTileSource("MapQuest", 0, 18, 256, ".png",new String[] {"file:///android_asset/try/"} ));
mapView.setUseDataConnection(false); //keeps the mapView from loading online tiles usi1ng network connection.
mapView.getController().setCenter(new GeoPoint(54.370958, 18.589210));
giveMarkersForActualLevel();
and everything is ok till I try to zoom in, there are part of maps which not rendering properly. Then I zoom out and then area which was on the beginning rendered properly is now having some gray tiles.
Firstly, I used osmdroid 4.3, added in this way:
compile 'org.osmdroid:osmdroid-android:4.3'
Then I try with newest version of osmdroid, importing it by method which is described on the website compile 'org.osmdroid:osmdroid-android:5.1@aar'
Then I read here tu build from sources so I download newest sources, build it by gradle and added aar file osmdroid-android-release.aar.
This doesn't fix my issue, too.
After zoom in and zoom out, I'm removing markers and adding another ones, so I tried to refresh map in this way.
((View)mapView.getParent()).invalidate();
mapView.invalidate();
mapView.postInvalidate();
Marker startMarker = new Marker(mapView);
startMarker.setPosition(new GeoPoint(54.337385, 18.662132));
setPropertiesForTopMarker(startMarker);
mapView.getOverlays().add(startMarker);
Marker startMarker1 = new Marker(mapView);
startMarker1.setPosition(new GeoPoint(54.332781, 18.587932));
setPropertiesForTopMarker(startMarker1);
mapView.getOverlays().add(startMarker1);
mapView.invalidate();
((View)mapView.getParent()).invalidate();
mapView.invalidate();
mapView.postInvalidate();
but it doesn't work too.
Have you got any ideas, how this issue can be resolved?
EDITED:
I tried to build osmdroid from sources to change this values mentioned by @spy. The debug from my logcat looks ok. Here are logs. I can't paste it here, because there are too many lines.
I tried with adding tiles providers in this way:
final IRegisterReceiver registerReceiver = new SimpleRegisterReceiver(getApplicationContext());
final ITileSource tileSource = new XYTileSource("MapQuest", 12, 14, 256, ".png",new String[] {"file:///android_asset/MapQuest/"} );
final MapTileFilesystemProvider fileSystemProvider = new MapTileFilesystemProvider(
registerReceiver, tileSource);
final MapTileProviderArray tileProviderArray = new MapTileProviderArray(
tileSource, registerReceiver, new MapTileModuleProviderBase[] {
fileSystemProvider});
mapView = new MapView(this, new DefaultResourceProxyImpl(this), tileProviderArray);
or this way
final IRegisterReceiver registerReceiver = new SimpleRegisterReceiver(getApplicationContext());
final ITileSource tileSource = new XYTileSource("MapQuest", 12, 14, 256, ".png",new String[] {"file:///android_asset/MapQuest/"} );
final MapTileFilesystemProvider fileSystemProvider = new MapTileFilesystemProvider(
registerReceiver, tileSource);
final MapTileProviderArray tileProviderArray = new MapTileProviderArray(
tileSource, registerReceiver, new MapTileModuleProviderBase[] {
fileSystemProvider});
TilesOverlay tilesOverlay =
new TilesOverlay(tileProviderArray, getApplicationContext());
mapView.getOverlays().add(tilesOverlay);
but both methods didn't show me any map. Source of this code.
Ok, finally I solve my issue by using Providers.
I made few modification of code taken from this answer, so right now it looks like this.
mapView.setClickable(true);
mapView.setBuiltInZoomControls(false);
mapView.setMaxZoomLevel(macroZoomLevel);
mapView.setMinZoomLevel(macroZoomLevel);
mapView.getController().setZoom(macroZoomLevel); //set initial zoom-level, depends on your need
mapView.setUseDataConnection(false); //keeps the mapView from loading online tiles usi1ng network connection.
mapView.getController().setCenter(new GeoPoint(54.370958, 18.589210));
// save zip to sd
AssetManager assetManager = this.getAssets();
InputStream is;
String fileName = "map.zip"; // the zip file lies in assets root
String path = this.getExternalFilesDir(null) + File.separator + fileName; // the path I save SD to
File tileFile = new File(path);
if(!tileFile.exists()) {
try {
is = assetManager.open(fileName);
FileOutputStream fo = new FileOutputStream(path);
byte[] b = new byte[1024];
int length;
while((length = is.read(b)) != -1) {
fo.write(b, 0, length);
}
fo.flush();
fo.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
IArchiveFile[] archives = new IArchiveFile[1];
archives[0] = ArchiveFileFactory.getArchiveFile(tileFile);
// Simple implementation that extends BitmapTileSourceBase and nothing else
CustomTileSource customTiles = new CustomTileSource("MapQuest", null, 10, 14, 256, ".png"); // Maverik is the name of the folder inside the zip (so zip is map.zip and inside it is a folder called Maverik)
MapTileModuleProviderBase[] providers = new MapTileModuleProviderBase[1];
providers[0] = new MapTileFileArchiveProvider(new SimpleRegisterReceiver(this.getApplicationContext()), customTiles, archives); // this one is for local tiles (zip etc.)
MapTileProviderArray tileProvider = new MapTileProviderArray(customTiles,
new SimpleRegisterReceiver(this.getApplicationContext()), providers);
tilesOverlay = new TilesOverlay(tileProvider, this.getApplicationContext());
tilesOverlay.setLoadingBackgroundColor(Color.TRANSPARENT); // this makes sure that the invisble tiles of local tiles are transparent so we can see tiles from web, transparent have a minor performance decline.
mapView.getOverlays().add(tilesOverlay);
CustomTileSource looks like this:
public class CustomTileSource extends BitmapTileSourceBase {
public CustomTileSource(String aName, ResourceProxy.string aResourceId, int aZoomMinLevel, int aZoomMaxLevel, int aTileSizePixels, String aImageFilenameEnding) {
super(aName, aResourceId, aZoomMinLevel, aZoomMaxLevel, aTileSizePixels, aImageFilenameEnding);
}
}
so this is just subclass of BitmapTileSourceBase without any additional method.
I have in assets zip type file, which name is map.zip, structure of this directory looks like this:
map.zip/MapQuest/[lvlOfZoom]/[x]/[y.png]
And now it works ok, I only zooming when I click on my marker, the user by gesture can't do that.
If you have some problems with implementing approach descripted by me or something isn't clear for you, I will try to help you in comments.