Android Open Source - WhatsUp Map View Activity

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License

The source code is released under:
GNU General Public License
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Java Source Code

package nu.placebo.whatsup.activity;
/*from ww  w.j a  va2  s  .c  o  m*/
import java.util.List;

import nu.placebo.whatsup.R;
import nu.placebo.whatsup.constants.Constants;
import nu.placebo.whatsup.datahandling.DataProvider;
import nu.placebo.whatsup.model.ExtendedOverlayItem;
import nu.placebo.whatsup.model.GeoLocation;
import nu.placebo.whatsup.model.ReferencePoint;
import nu.placebo.whatsup.network.GeoLocationsRetrieve;
import nu.placebo.whatsup.network.NetworkCalls;
import nu.placebo.whatsup.network.NetworkOperationListener;
import nu.placebo.whatsup.network.NetworkTask;
import nu.placebo.whatsup.network.OperationResult;
import nu.placebo.whatsup.util.GeoPointUtil;
import android.content.Context;
import android.content.Intent;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;

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

/**
 * Activity that holds the map and control map actions. It's the "main"
 * activity.
 * 
 * @author Albin Bramstng
 */
public class MapViewActivity extends MapActivity implements OnClickListener,
    NetworkOperationListener<List<GeoLocation>> {

  private MapView mapView;
  private Marker marker;
  private Marker refPointMarker;
  private List<Overlay> overlays;
  private LocationManager locationManager;
  private DataProvider dataProvider;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    NetworkCalls.setTesting(false);
    setContentView(R.layout.map);
    mapView = (MapView) findViewById(R.id.mapview);
    mapView.setBuiltInZoomControls(true);
    overlays = mapView.getOverlays();
    dataProvider = DataProvider.getDataProvider(this);
    marker = new Marker(this.getResources().getDrawable(R.drawable.pin),
        mapView, this);
    refPointMarker = new Marker(this.getResources().getDrawable(
        R.drawable.home), mapView, this);
    addReferenceOverlay();
    setupToolbar();
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
  }

  /**
   * Add the current reference point to the map.
   */
  private void addReferenceOverlay() {
    ReferencePoint p = dataProvider.getCurrentReferencePoint();
    OverlayItem item = new OverlayItem(p.getGeoPoint(), p.getName(), null);
    refPointMarker.addOverlay(item);
    refPointMarker.callPopulate();
    overlays.add(refPointMarker);
    mapView.invalidate();
  }

  private void setupToolbar() {
    ImageButton gotoListBtn = (ImageButton) this
        .findViewById(R.id.map_goto_list);
    gotoListBtn.setOnClickListener(this);
    ImageButton refreshBtn = (ImageButton) this
        .findViewById(R.id.map_refresh);
    refreshBtn.setOnClickListener(this);
    ImageButton addAnnotationButton = (ImageButton) findViewById(R.id.add_annotation);
    addAnnotationButton.setOnClickListener(this);
    ImageButton refPointBtn = (ImageButton) this
        .findViewById(R.id.goto_refpoint);
    refPointBtn.setOnClickListener(this);
    ImageButton goToHomeBtn = (ImageButton) findViewById(R.id.goto_home);
    goToHomeBtn.setOnClickListener(this);
  }

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

  /**
   * Creates overlays and adds them to the map.
   * 
   * @param g
   */
  private void addMarkers(List<GeoLocation> g) {
    for (GeoLocation h : g) {
      marker.addOverlay(new ExtendedOverlayItem(h));
    }
    marker.callPopulate();
    overlays.add(marker);
    mapView.invalidate();
  }

  public void onClick(View v) {
    if (v.getId() == R.id.map_goto_list) {
      Intent intent = new Intent(MapViewActivity.this,
          ListViewActivity.class);
      this.startActivity(intent);
      this.finish();
    } else if (v.getId() == R.id.map_refresh) {
      refresh();
    } else if (v.getId() == R.id.add_annotation) {
      Intent intent = new Intent(MapViewActivity.this,
          PositionPickerActivity.class);
      intent.putExtra("requestCode", Constants.ANNOTATION);
      this.startActivity(intent);
    } else if (v.getId() == R.id.goto_refpoint) {
      Intent intent = new Intent(this, RefPointActivity.class);
      this.startActivity(intent);
    } else if (v.getId() == R.id.goto_home) {
      mapView.getController().animateTo(dataProvider.getCurrentReferencePoint().getGeoPoint());
    }
  }

  /**
   * Retrieves information about the current location on the map, and sends it
   * to the server.
   */
  public void refresh() {
    marker.clear();
    GeoPoint[] p = GeoPointUtil.getBottomLeftToTopRightPoints(
        mapView.getMapCenter(), mapView.getLatitudeSpan(),
        mapView.getLongitudeSpan());
    double[] d = GeoPointUtil.convertAreaToDoubles(p[0], p[1]);
    GeoLocationsRetrieve gr = new GeoLocationsRetrieve(d[0], d[1], d[2],
        d[3]);
    gr.addOperationListener(this);
    new NetworkTask<List<GeoLocation>>().execute(gr);
  }

  @Override
  protected void onPause() {
    super.onPause();

    locationManager.removeUpdates(DataProvider
        .getDataProvider(getApplicationContext()));
  }

  @Override
  protected void onResume() {
    super.onResume();
    refPointMarker.clear();
    addReferenceOverlay();

    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
        30,
        50,
        DataProvider.getDataProvider(getApplicationContext()));
  }

  public void operationExcecuted(
      final OperationResult<List<GeoLocation>> result) {
    if (!result.hasErrors()) {
      addMarkers(result.getResult());
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuHelper.inflate(menu, this.getMenuInflater());
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    return MenuHelper.onOptionsItemSelected(item, this);
  }

  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
    return MenuHelper.onPrepareOptionsMenu(menu, this);
  }
}
Java Source Code List
