VenueMapActivity.java

/**
 * Copyright 2009 Joe LaPenna
 */

package com.joelapenna.foursquared;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.joelapenna.foursquare.types.Group;
import com.joelapenna.foursquare.types.Venue;
import com.joelapenna.foursquare.util.VenueUtils;
import com.joelapenna.foursquared.maps.CrashFixMyLocationOverlay;
import com.joelapenna.foursquared.maps.VenueItemizedOverlay;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

import java.util.Observable;
import java.util.Observer;

/**
 * @author Joe LaPenna (joe@joelapenna.com)
 */
public class VenueMapActivity extends MapActivity {
    public static final String TAG = "VenueMapActivity";
    public static final boolean DEBUG = FoursquaredSettings.DEBUG;

    private MapView mMapView;
    private MapController mMapController;
    private VenueItemizedOverlay mOverlay = null;
    private MyLocationOverlay mMyLocationOverlay = null;

    private Venue mVenue;
    private Observer mVenueObserver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.venue_map_activity);

        Button mapsButton = (Button) findViewById(R.id.mapsButton);
        mapsButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse( //
                        "geo:0,0?q=" + mVenue.getName() + " near " + mVenue.getCity()));
                startActivity(intent);

            }
        });
        if (FoursquaredSettings.SHOW_VENUE_MAP_BUTTON_MORE == false) {
            mapsButton.setVisibility(View.GONE);
        }

        initMap();

        Venue venue = ((VenueActivity) getParent()).venueObservable.getVenue();
        if (venue != null) {
            setVenue(venue);
            updateMap();

        } else {
            mVenueObserver = new VenueObserver();
            ((VenueActivity) getParent()).venueObservable.addObserver(mVenueObserver);
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        mMyLocationOverlay.enableMyLocation();
        // mMyLocationOverlay.enableCompass(); // Disabled due to a sdk 1.5
        // emulator bug
    }

    @Override
    public void onPause() {
        super.onPause();
        mMyLocationOverlay.disableMyLocation();
        mMyLocationOverlay.disableCompass();
    }

    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }

    private void initMap() {
        mMapView = (MapView) findViewById(R.id.mapView);
        mMapView.setBuiltInZoomControls(true);
        mMapController = mMapView.getController();

        mMyLocationOverlay = new CrashFixMyLocationOverlay(this, mMapView);
        mMapView.getOverlays().add(mMyLocationOverlay);

        mOverlay = new VenueItemizedOverlay(this.getResources().getDrawable(
                R.drawable.map_marker_blue));
    }

    private void setVenue(Venue venue) {
        Group<Venue> venueGroup = new Group<Venue>();
        venueGroup.setType("Current Venue");
        venueGroup.add(venue);
        mVenue = venue;
        if (VenueUtils.hasValidLocation(venue)) {
            mOverlay.setGroup(venueGroup);
            mMapView.getOverlays().add(mOverlay);
        }
    }

    private void updateMap() {
        GeoPoint center;
        if (mOverlay != null && mOverlay.size() > 0) {
            center = mOverlay.getCenter();
        } else {
            return;
        }
        mMapController.animateTo(center);
        mMapController.setZoom(17);
    }

    private final class VenueObserver implements Observer {
        @Override
        public void update(Observable observable, Object data) {
            setVenue((Venue) data);
            updateMap();
        }
    }
}