Android Open Source - local-stories Map Fragment

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License

The source code is released under:

Apache License

Java Source Code

package no.hiof.stud.localstories;
//from   w w w.  j  a v  a 2s  . c  o m
import java.util.ArrayList;

import org.osmdroid.DefaultResourceProxyImpl;
import org.osmdroid.ResourceProxy;
import org.osmdroid.tileprovider.LRUMapTileCache;
import org.osmdroid.tileprovider.MapTileProviderBase;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.tileprovider.util.CloudmadeUtil;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapController;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.OverlayItem;

import android.app.Activity;
import android.content.Intent;
import android.graphics.PorterDuff.Mode;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ZoomControls;

public class MapFragment extends Fragment {
  private MapView         mMapView;
    private MapController   mMapController;
    
    ZoomControls zoom;
    
    MyItemizedOverlay myItemizedOverlay = null;
    MyOwnItemizedOverlay myOwnItemizedOverlay = null;
    
    public Boolean showLocation = false;    
  
  @Override
    public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    }
    
    @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
      // Inflate the layout for this fragment
        return inflater.inflate(R.layout.map_fragment, container, false);
    }
    
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        // OSMdroid-code here
        Fragment frag = getFragmentManager().findFragmentByTag("map_Fragment");
      mMapView = (MapView) frag.getView().findViewById(R.id.mapview);
      
      CloudmadeUtil.retrieveCloudmadeKey(getActivity());
      mMapView.setTileSource(TileSourceFactory.CLOUDMADESTANDARDTILES); // previously MAPNIK
      
      // Increase cache
      final MapTileProviderBase mapTileProvider = this.mMapView.getTileProvider();
      int pCapacity=35;
      mapTileProvider.ensureCapacity(pCapacity);
      LRUMapTileCache capacity = new LRUMapTileCache(pCapacity);
      capacity.ensureCapacity(pCapacity);
      
      mMapView.setMultiTouchControls(true);
      mMapView.setBuiltInZoomControls(true);
  
      mMapController = mMapView.getController();
      
      GeoPoint gPt= decimalDegreesToGeoPoint(MainActivity.lat, MainActivity.lng);
      
      zoom = (ZoomControls) frag.getView().findViewById(R.id.map_zoom_controls);
      zoom.setOnZoomInClickListener(new OnClickListener() {
       
       @Override
       public void onClick(View v) {
         mMapController.setZoom(mMapView.getZoomLevel()+1);
         Log.i("LocalStories", "Zoom level now: " + mMapView.getZoomLevel());
         }
       });
      
        zoom.setOnZoomOutClickListener(new View.OnClickListener() {
           
       @Override
       public void onClick(View v) {
         mMapController.setZoom(mMapView.getZoomLevel()-1);
         Log.i("LocalStories", "Zoom level now: " + mMapView.getZoomLevel());
         }
       });
        
      mMapController.setZoom(13);
      //mMapController.setCenter(gPt);
      
      try {        
        Intent intent = getActivity().getIntent();
          String message = intent.getStringExtra(EventActivity.EVENT_ID);
          int id= Integer.parseInt(message);
          float cLat = (float) Library.Events.get(id).getLat();
          float cLng = (float) Library.Events.get(id).getLng();
          Log.i("LocalStories", "Centering on event with id="+id+".");
          mMapController.animateTo(decimalDegreesToGeoPoint(cLat,cLng));
    } catch (Exception e) {
      // TODO: handle exception
      Log.i("LocalStories", "No center point specified - defaulting to user's position.");
      mMapController.animateTo(gPt);
    }
        
        // Add overlays for current position and relevant events (default args or results from search)
        addOverlayCurrentPosition(gPt);
        addOverlays();
    }

    /**
     * An appropriate place to override and add overlays.
     * @param gPt = current position
     */
    
    protected void addOverlayCurrentPosition(GeoPoint gPt) {
      Drawable marker=getResources().getDrawable(android.R.drawable.btn_star_big_on);
      int iconColor = android.graphics.Color.rgb(38, 181, 225);
      marker.setColorFilter( iconColor, Mode.SRC_ATOP );
      
        int markerWidth = marker.getIntrinsicWidth();
        int markerHeight = marker.getIntrinsicHeight();
        marker.setBounds(0, markerHeight, markerWidth, 0);
         
        ResourceProxy resourceProxy = new DefaultResourceProxyImpl(getActivity());
         
        myItemizedOverlay = new MyItemizedOverlay(marker, resourceProxy);
        
        Fragment frag = getFragmentManager().findFragmentByTag("map_Fragment");
      mMapView = (MapView) frag.getView().findViewById(R.id.mapview);
        mMapView.getOverlays().add(myItemizedOverlay);
         
        myItemizedOverlay.addItem(gPt, "currentPosition", "currentPosition");
    }
    
    protected void addOverlays() {
      Drawable marker=getResources().getDrawable(android.R.drawable.star_big_on);
        int markerWidth = marker.getIntrinsicWidth();
        int markerHeight = marker.getIntrinsicHeight();
        marker.setBounds(0, markerHeight, markerWidth, 0);
         
        myOwnItemizedOverlay = new MyOwnItemizedOverlay(marker, getActivity());
        
        Fragment frag = getFragmentManager().findFragmentByTag("map_Fragment");
      mMapView = (MapView) frag.getView().findViewById(R.id.mapview);
        mMapView.getOverlays().add(myOwnItemizedOverlay.getOverlay());
        
        ArrayList<Event> events = Search.getList();
        Log.i("LocalStories", "Events size: "+events.size());
      for(int i=0; i<events.size(); i++){
        GeoPoint eventPoint = decimalDegreesToGeoPoint((float) events.get(i).getLat(), (float) events.get(i).getLng());
        myOwnItemizedOverlay.addItem(new OverlayItem("Event " + i, "Event " + i, eventPoint));
      }
    }
    
    protected static GeoPoint decimalDegreesToGeoPoint(float lat, float lng)
    {
      return new GeoPoint((int)(lat * 1E6), (int)(lng * 1E6));
    }
}

Java Source Code List

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