java - opening offline tiles in Osmdroid -


i trying develop offline map using osmdroid , trying use mbtiles created mobile atlas creator every-time open application crashes. here main activity code. when use normal jpg file load tiles, works fine no use cannot bound maps.

    package com.maptry.katgp;      import java.io.file;     import java.util.arraylist;      import org.osmdroid.defaultresourceproxyimpl;     import org.osmdroid.resourceproxy;     import org.osmdroid.api.imapcontroller;     import org.osmdroid.tileprovider.iregisterreceiver;     import org.osmdroid.tileprovider.tilesource.xytilesource;     import org.osmdroid.util.boundingboxe6;     import org.osmdroid.util.geopoint;     import org.osmdroid.views.mapcontroller;     import org.osmdroid.views.mapview;     import org.osmdroid.views.overlay.overlayitem;      import android.os.bundle;     import android.os.environment;     import android.app.activity;      public class mainactivity extends activity implements iregisterreceiver { // initializing mapview mapview mapview; // private mapcontroller mapcontroller;  // arraylist<overlayitem> anotheroverlayitemarray;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     // contents main      setcontentview(r.layout.activity_main);      // connecting xml layout id      mapview = (mapview) findviewbyid(r.id.mapview);      // setting default online tiles     // mapnik not working replaced mapquest      // online use     // mapview.settilesource(tilesourcefactory.mapquestosm);      //adding offline tiles using mbtiles       defaultresourceproxyimpl resproxy;         resproxy = new defaultresourceproxyimpl(this.getapplicationcontext());            file file = new file(environment.getexternalstoragedirectory(), "maptile.mbtiles");          mbtileprovider provider = new mbtileprovider(this, file);         boundedmapview mapview = new boundedmapview(this, resproxy, provider);          double north = 27.749177;         double east  =  85.382652;         double south = 27.648864;         double west  =  85.262489;         boundingboxe6 bbox = new boundingboxe6(north, east, south, west);          mapview.setscrollablearealimit(bbox);      /*      * // adding offline tiles      *       * mapview.settilesource(new xytilesource("mapquest",      * resourceproxy.string.mapquest_osm, 13, 18, 256, ".jpg", new string[]      * { "http://otile1.mqcdn.com/tiles/1.0.0/map/",      * "http://otile2.mqcdn.com/tiles/1.0.0/map/",      * "http://otile3.mqcdn.com/tiles/1.0.0/map/",      * "http://otile4.mqcdn.com/tiles/1.0.0/map/" }));      */      // zooming , multitouch controls      mapview.setbuiltinzoomcontrols(true);     mapview.setmultitouchcontrols(true);      mapview.setusedataconnection(false);      mapcontroller controller = mapview.getcontroller();         controller.setzoom(12);         controller.animateto(new geopoint(27.7, 85.32)); }

}


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