Android Open Source - android-roadkill Map Data

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License

The source code is released under:

GNU General Public License

Java Source Code

package edu.ucdavis.cros.roadkill;
/*www . j  ava2s  . c o  m*/
import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.database.Cursor;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;

public class MapData extends MapActivity {

  public static final String EXTRA_LATITUDE = "edu.ucdavis.cros.roadkill.EXTRA_LATITUDE";
  public static final String EXTRA_LONGITUDE = "edu.ucdavis.cros.roadkill.EXTRA_LONGITUDE";
  public static final String EXTRA_NAME = "edu.ucdavis.cros.roadkill.EXTRA_NAME";

  private LinearLayout linearLayout;
  public static MapView mapView;
  private List<Overlay> mapOverlays;
  private Drawable drawable;
  private Overlays overlays;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mapdata);

    double latitude = Double.parseDouble(getIntent().getStringExtra(
        EXTRA_LATITUDE));
    double longitude = Double.parseDouble(getIntent().getStringExtra(
        EXTRA_LONGITUDE));

    // set the starting location
    GeoPoint start = getPoint(latitude, longitude);

    // sets up mapview
    mapView = (MapView) findViewById(R.id.mapview);
    mapView.setBuiltInZoomControls(true); // sets up zoom control
    mapView.getController().setZoom(10); // sets default zoom
    mapView.getController().setCenter(start); // sets default map location

    // sets up overlay
    mapOverlays = mapView.getOverlays();
    drawable = this.getResources().getDrawable(android.R.drawable.star_on);
    overlays = new Overlays(drawable, this);

    // creates overlay items from records in database
    OverlayItem overlayitem;
    GeoPoint point;
    myDbAdapter myDbHelper = new myDbAdapter(this);
    myDbHelper.open();
    Cursor cursor = myDbHelper.allrecords();
    cursor.moveToFirst();

    while (cursor.isAfterLast() == false) {
      point = new GeoPoint(
          (int) (Double.valueOf(cursor.getString(3)) * 1000000.0),
          (int) (Double.valueOf(cursor.getString(4)) * 1000000.0));

      overlayitem = new OverlayItem(point, cursor.getString(2),
          cursor.getString(2));
      overlays.addOverlay(overlayitem);
      cursor.moveToNext();

    }
    myDbHelper.close();
    cursor.close();

    // adds the overlay item to our list
    mapOverlays.add(overlays);
  }

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

  private GeoPoint getPoint(double lat, double lon) {
    return (new GeoPoint((int) (lat * 1000000.0), (int) (lon * 1000000.0)));
  }

  public class Overlays extends ItemizedOverlay<OverlayItem> {

    // list of overlay items we wish to add to map
    private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();

    public Overlays(Drawable defaultMarker, Context context) {
      super(boundCenterBottom(defaultMarker));
    }

    // adds the overlay items
    public void addOverlay(OverlayItem overlay) {
      mOverlays.add(overlay);
      populate();
    }

    // populate() calls this method to read from our overlay list
    @Override
    protected OverlayItem createItem(int i) {
      return mOverlays.get(i);
    }

    @Override
    public int size() {
      return mOverlays.size();
    }

    // displays information of overlay item when tapped
    @Override
    protected boolean onTap(int index) {
      OverlayItem item = mOverlays.get(index);
      Toast.makeText(MapData.this, item.getSnippet(), Toast.LENGTH_LONG)
          .show();
      return true;
    }

  }

  /*
   * // gets coordinates of location touched on map
   * 
   * @Override public boolean onTouchEvent(MotionEvent event, MapView mapview)
   * {
   * 
   * if (event.getAction() == MotionEvent.ACTION_UP) { GeoPoint p =
   * mapview.getProjection().fromPixels((int) event.getX(), (int)
   * event.getY()); Toast.makeText(myContext, p.getLatitudeE6() / 1E6 + "," +
   * p.getLongitudeE6() / 1E6, Toast.LENGTH_SHORT).show(); MyMap mMap =
   * (MyMap) myContext; mMap.finish(); }
   * 
   * return false;
   * 
   * }
   */

}

Java Source Code List

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