Android Open Source - sbicktAndroid Map View Activity

From Project

Back to project page sbicktAndroid.
License

The source code is released under:
GNU General Public License
If you think the Android project sbicktAndroid listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package geotag.example.sbickt;
/*  w w w.  ja  va 2  s . com*/
import geotag.core.GeoTag;
import geotag.core.Point3D;
import geotag.core.R;

import java.util.LinkedList;
import java.util.List;
import java.util.Queue;

import android.app.ProgressDialog;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.Toast;

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

public class MapViewActivity extends MapActivity {
  
  private final int GPS_REFRESH_TIME_IN_MS = 60000;
  private final int GPS_REFRESH_DISTANCE_IN_M = 50;

  private MapView mapView;
  private MyLocationOverlay myLocationOverlay;
  private SbicktMessagesOverlay sbicktMessagesOverlay;

  private Drawable sbicktMessageDrawable;
  
  private LocationManager locationManager;
  private Location currentLocation;
  
  @Override
  protected void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    
    setContentView(R.layout.map_view);
    
    mapView = (MapView) findViewById(R.id.mapview);
    mapView.setBuiltInZoomControls(true);
    
    initLocationManager();

    //initMyLocationOverlay();
  }
  
  @Override
  protected void onStart() {
    super.onStart();
    
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, GPS_REFRESH_TIME_IN_MS, GPS_REFRESH_DISTANCE_IN_M, locationListener);
  }
  
  @Override
  protected void onResume() {
    super.onResume();
    new InitSbicktMessageOverlay().execute(currentLocation);
  }
  
  @Override
  protected void onStop() {
    super.onStop();
    
    locationManager.removeUpdates(locationListener);
  }
  
  private void initLocationManager(){
    sbicktMessageDrawable = this.getResources().getDrawable(R.drawable.map_item);
    sbicktMessagesOverlay = new SbicktMessagesOverlay(sbicktMessageDrawable, this);
    
    locationManager = (LocationManager)getSystemService(LOCATION_SERVICE);
    currentLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
  }
  
  private void initMyLocationOverlay(){
    myLocationOverlay = new MyLocationOverlay(this, mapView);
    myLocationOverlay.enableMyLocation();
    mapView.getOverlays().add(myLocationOverlay);
  }

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

  private final LocationListener locationListener = new LocationListener() {
    
    public void onStatusChanged(String provider, int status, Bundle extras) {}
    
    public void onProviderEnabled(String provider) {}
    
    public void onProviderDisabled(String provider) {}
    
    public void onLocationChanged(Location location) {
      new UpdateSbicktMessageOverlay().execute(location);
      currentLocation = location;
    }
  };
  
  private class UpdateSbicktMessageOverlay extends AsyncTask<Location, Void, Queue<GeoTag>>{

    @Override
    protected Queue<GeoTag> doInBackground(Location... params) {
      Queue<GeoTag> geoTags = new LinkedList<GeoTag>();
      
      try {
        geoTags = SbicktAPI.getGeoTags(new Point3D(params[0]));
      } catch (Exception e) {
        e.printStackTrace();
      }
      return geoTags;
    }
    
    @Override
    protected void onPostExecute(Queue<GeoTag> result) {
      if(result.isEmpty()){
        Toast.makeText(getBaseContext(), "no messages received", Toast.LENGTH_LONG).show();
      }
      else {        
        List<Overlay> overlays = mapView.getOverlays();
        overlays.clear();
        
        sbicktMessagesOverlay.clear();
        
        for(GeoTag g : result){
          GeoPoint point = new GeoPoint((int) (g.getX() * 1E6), (int) (g.getY() * 1E6));
          OverlayItem overlayItem = new OverlayItem(point, g.getOwner(), g.getContent());
          
          sbicktMessagesOverlay.addOverlay(overlayItem);
        }
        
        overlays.add(sbicktMessagesOverlay);
        mapView.invalidate();
      }
    }
    
  }
  
  private class InitSbicktMessageOverlay extends UpdateSbicktMessageOverlay {

    private ProgressDialog sbicktMessagesDialog = new ProgressDialog(MapViewActivity.this);
    
    @Override
    protected void onPreExecute() {
      super.onPreExecute();
      sbicktMessagesDialog.setMessage("lade s'bickt Nachrichten...");
      sbicktMessagesDialog.show();
    }
    
    @Override
    protected void onPostExecute(Queue<GeoTag> result) {
      super.onPostExecute(result);
      sbicktMessagesDialog.dismiss();
    }
    
  }
}
Java Source Code List
