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osmdroid#180 auto zoom to bounds of the selected tile source for both…
… geopackage and mapsforge. osmdroid#527 found a simplier solution
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253
...tMapViewer/src/main/java/org/osmdroid/samplefragments/tileproviders/GeopackageSample.java
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| package org.osmdroid.samplefragments.tileproviders; | ||
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| import android.content.DialogInterface; | ||
| import android.os.Build; | ||
| import android.os.Bundle; | ||
| import android.util.Log; | ||
| import android.view.InputDevice; | ||
| import android.view.LayoutInflater; | ||
| import android.view.MotionEvent; | ||
| import android.view.View; | ||
| import android.view.ViewGroup; | ||
| import android.widget.TextView; | ||
| import android.widget.Toast; | ||
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| import org.osmdroid.R; | ||
| import org.osmdroid.api.IGeoPoint; | ||
| import org.osmdroid.api.IMapView; | ||
| import org.osmdroid.config.Configuration; | ||
| import org.osmdroid.events.MapListener; | ||
| import org.osmdroid.events.ScrollEvent; | ||
| import org.osmdroid.events.ZoomEvent; | ||
| import org.osmdroid.gpkg.GeoPackageMapTileModuleProvider; | ||
| import org.osmdroid.gpkg.GeoPackageProvider; | ||
| import org.osmdroid.samplefragments.BaseSampleFragment; | ||
| import org.osmdroid.tileprovider.tilesource.XYTileSource; | ||
| import org.osmdroid.tileprovider.util.StorageUtils; | ||
| import org.osmdroid.views.MapView; | ||
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| import java.io.File; | ||
| import java.io.FileFilter; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
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| import static org.osmdroid.samplefragments.events.SampleMapEventListener.df; | ||
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| /** | ||
| * One way for viewing geopackage tiles to the osmdroid view | ||
| * <p> | ||
| * created on 1/12/2017. | ||
| * | ||
| * @author Alex O'Ree | ||
| * @since 5.6.3 | ||
| */ | ||
|
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| public class GeopackageSample extends BaseSampleFragment { | ||
| TextView textViewCurrentLocation; | ||
| GeoPackageProvider.TileSourceBounds tileSourceBounds; | ||
| XYTileSource currentSource = null; | ||
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| @Override | ||
| public String getSampleTitle() { | ||
| return "Geopackage tiles"; | ||
| } | ||
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| @Override | ||
| public void onCreate(Bundle savedInstanceState) { | ||
| super.onCreate(savedInstanceState); | ||
| setHasOptionsMenu(true); | ||
| Log.d(TAG, "onCreate"); | ||
| } | ||
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| @Override | ||
| public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { | ||
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| View root = inflater.inflate(R.layout.map_with_locationbox, container, false); | ||
| mMapView = (MapView) root.findViewById(R.id.mapview); | ||
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| if (Build.VERSION.SDK_INT >= 12) { | ||
| mMapView.setOnGenericMotionListener(new View.OnGenericMotionListener() { | ||
| /** | ||
| * mouse wheel zooming ftw | ||
| * http://stackoverflow.com/questions/11024809/how-can-my-view-respond-to-a-mousewheel | ||
| * @param v | ||
| * @param event | ||
| * @return | ||
| */ | ||
| @Override | ||
| public boolean onGenericMotion(View v, MotionEvent event) { | ||
| if (0 != (event.getSource() & InputDevice.SOURCE_CLASS_POINTER)) { | ||
| switch (event.getAction()) { | ||
| case MotionEvent.ACTION_SCROLL: | ||
| if (event.getAxisValue(MotionEvent.AXIS_VSCROLL) < 0.0f) | ||
| mMapView.getController().zoomOut(); | ||
| else { | ||
| mMapView.getController().zoomIn(); | ||
| } | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
| }); | ||
| } | ||
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| textViewCurrentLocation = (TextView) root.findViewById(R.id.textViewCurrentLocation); | ||
| return root; | ||
| } | ||
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| @Override | ||
| public void addOverlays() { | ||
| super.addOverlays(); | ||
| //first let's up our map source, mapsforge needs you to explicitly specify which map files to load | ||
| //this bit does some basic file system scanning | ||
| Set<File> mapfiles = findMapFiles(); | ||
| //do a simple scan of local storage for .gpkg files. | ||
| File[] maps = new File[mapfiles.size()]; | ||
| maps = mapfiles.toArray(maps); | ||
| if (maps.length == 0) { | ||
| //show a warning that no map files were found | ||
| android.app.AlertDialog.Builder alertDialogBuilder = new android.app.AlertDialog.Builder( | ||
| getContext()); | ||
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| // set title | ||
| alertDialogBuilder.setTitle("No Geopackage files found"); | ||
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| // set dialog message | ||
| alertDialogBuilder | ||
| .setMessage("In order to render map tiles, you'll need to either create or obtain .gpkg files. See http://www.geopackage.org/ for more info. Place them in " | ||
| + Configuration.getInstance().getOsmdroidBasePath().getAbsolutePath()) | ||
| .setCancelable(false) | ||
| .setPositiveButton("Yes", new DialogInterface.OnClickListener() { | ||
| public void onClick(DialogInterface dialog, int id) { | ||
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| } | ||
| }); | ||
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| // create alert dialog | ||
| android.app.AlertDialog alertDialog = alertDialogBuilder.create(); | ||
|
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| // show it | ||
| alertDialog.show(); | ||
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| } else { | ||
| Toast.makeText(getContext(), "Loaded " + maps.length + " map files", Toast.LENGTH_LONG).show(); | ||
| GeoPackageProvider geoPackageProvider = new GeoPackageProvider(maps, this.getContext()); | ||
| mMapView.setTileProvider(geoPackageProvider); | ||
| List<GeoPackageMapTileModuleProvider.Container> tileSources = geoPackageProvider.geoPackageMapTileModuleProvider().getTileSources(); | ||
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| //here we're keeping track of the current tile source so we can reference it later, primarly for | ||
| //displaying the bounds of the tile set | ||
| boolean sourceSet = false; | ||
| for (int i = 0; i < tileSources.size(); i++) { | ||
| //this is a list of geopackages, since we only support tile tables, pick the first one of those | ||
| //ideally this should populate a spinner so that the user can select whatever tile source they want | ||
| if (tileSources.get(i) != null && !tileSources.get(i).tiles.isEmpty()) { | ||
| currentSource = (XYTileSource) geoPackageProvider.getTileSource(tileSources.get(i).database, | ||
| tileSources.get(0).tiles.get(i) | ||
| ); | ||
| mMapView.setTileSource(currentSource); | ||
| sourceSet = true; | ||
| break; | ||
| } | ||
| } | ||
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| if (!sourceSet) { | ||
| Toast.makeText(getContext(), "No tile source is available, get your geopackages for 'tiles' tables", Toast.LENGTH_LONG).show(); | ||
| } else { | ||
| Toast.makeText(getContext(), "Tile source set to " + mMapView.getTileProvider().getTileSource().name(), Toast.LENGTH_LONG).show(); | ||
| //this part will attempt to zoom to bounds of the selected tile source | ||
| tileSourceBounds = geoPackageProvider.getTileSourceBounds(); | ||
| if (tileSourceBounds != null) { | ||
| mMapView.zoomToBoundingBox(tileSourceBounds.bounds, true); | ||
| mMapView.getController().setZoom(tileSourceBounds.minzoom); | ||
| } | ||
| } | ||
| } | ||
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| mMapView.setMapListener(new MapListener() { | ||
| @Override | ||
| public boolean onScroll(ScrollEvent event) { | ||
| Log.i(IMapView.LOGTAG, System.currentTimeMillis() + " onScroll " + event.getX() + "," + event.getY()); | ||
| updateInfo(); | ||
| return true; | ||
| } | ||
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| @Override | ||
| public boolean onZoom(ZoomEvent event) { | ||
| Log.i(IMapView.LOGTAG, System.currentTimeMillis() + " onZoom " + event.getZoomLevel()); | ||
| updateInfo(); | ||
| return true; | ||
| } | ||
| }); | ||
| updateInfo(); | ||
| } | ||
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| private void updateInfo() { | ||
| StringBuilder sb = new StringBuilder(); | ||
| IGeoPoint mapCenter = mMapView.getMapCenter(); | ||
| sb.append(df.format(mapCenter.getLatitude()) + "," + | ||
| df.format(mapCenter.getLongitude()) | ||
| + ",zoom=" + mMapView.getZoomLevel()); | ||
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| if (currentSource != null) { | ||
| sb.append("\n"); | ||
| sb.append(currentSource.name() + "," + currentSource.getBaseUrl()); | ||
| } | ||
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| if (tileSourceBounds != null) { | ||
| sb.append("\n"); | ||
| sb.append(" minzoom=" + tileSourceBounds.minzoom); | ||
| sb.append(" maxzoom=" + tileSourceBounds.maxzoom); | ||
| sb.append(" bounds=" + df.format(tileSourceBounds.bounds.getLatNorth()) | ||
| + "," + df.format(tileSourceBounds.bounds.getLonEast()) + "," + | ||
| df.format(tileSourceBounds.bounds.getLatSouth()) + "," + | ||
| df.format(tileSourceBounds.bounds.getLonWest())); | ||
|
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| } | ||
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| textViewCurrentLocation.setText(sb.toString()); | ||
| } | ||
|
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| /** | ||
| * simple function to scan for paths that match /something/osmdroid/*.map to find database files | ||
| * | ||
| * @return | ||
| */ | ||
| protected static Set<File> findMapFiles() { | ||
| Set<File> maps = new HashSet<>(); | ||
| List<StorageUtils.StorageInfo> storageList = StorageUtils.getStorageList(); | ||
| for (int i = 0; i < storageList.size(); i++) { | ||
| File f = new File(storageList.get(i).path + File.separator + "osmdroid" + File.separator); | ||
| if (f.exists()) { | ||
| maps.addAll(scan(f)); | ||
| } | ||
| } | ||
| return maps; | ||
| } | ||
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| static private Collection<? extends File> scan(File f) { | ||
| List<File> ret = new ArrayList<>(); | ||
| File[] files = f.listFiles(new FileFilter() { | ||
| @Override | ||
| public boolean accept(File pathname) { | ||
| if (pathname.getName().toLowerCase().endsWith(".gpkg")) | ||
| return true; | ||
| return false; | ||
| } | ||
| }); | ||
| if (files != null) { | ||
| for (int i = 0; i < files.length; i++) { | ||
| ret.add(files[i]); | ||
| } | ||
| } | ||
| return ret; | ||
| } | ||
| } |
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