Android Open Source - SDCrimeZone Show Crime Map Activity

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Back to project page SDCrimeZone.

License

The source code is released under:

Apache License

Java Source Code

package com.crimezone.sd;
/*w w w.java2  s . c  o  m*/
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff.Mode;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.FrameLayout;

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.OverlayItem;

public class ShowCrimeMapActivity extends MapActivity {

  private MapController mapController;
  private MapView mapView;
  private LocationManager locationManager;
  private CrimeMapOverlay violentCrimeOverlay;
  private CrimeMapOverlay propertyCrimeOverlay;
  private CrimeMapOverlay otherCrimeOverlay;
  private GeoUpdateHandler gps;
  private Button violentCrimeButton;
  private Button propertyCrimeButton;
  private Button otherCrimeButton;
  private Boolean violentIsDisplayed = false;
  private Boolean propertyIsDisplayed = false;
  private Boolean otherIsDisplayed = false;

  public void onCreate(Bundle bundle) {
    super.onCreate(bundle);
    setContentView(R.layout.map); // bind the layout to the activity

    JSONArray results = null;
    Bundle bun = getIntent().getExtras();
    try {
      results = new JSONArray(bun.getString("results"));
      // this.populateGoogleMaps(results);
    } catch (JSONException e) {
      e.printStackTrace();
    }
    String startLat = bun.getString("startLat");
    String startLng = bun.getString("startLng");
    String radius = bun.getString("radius");
    GeoPoint currLocation = SDCrimeZoneApplication.getGeoPoint(startLat, startLng);

    // create a map view
    FrameLayout relativeLayout = (FrameLayout) findViewById(R.id.mapViewLayout);
    mapView = (MapView) findViewById(R.id.mapView);
    mapView.setBuiltInZoomControls(true);
    mapView.getOverlays().add(
        new CircleMapOverlay(this, Double.valueOf(startLat).doubleValue(), Double.valueOf(startLng)
            .doubleValue(), Float.valueOf(radius).floatValue()));
    // Either satellite or 2d
    mapView.setSatellite(false);
    mapController = mapView.getController();
    mapController.setZoom(15); // Zoon 1 is world view
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    gps = new GeoUpdateHandler(currLocation);
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, gps);

    Drawable drawable = this.getResources().getDrawable(R.drawable.point);

    violentCrimeOverlay = new CrimeMapOverlay(drawable, this);

    propertyCrimeOverlay = new CrimeMapOverlay(drawable, this);

    otherCrimeOverlay = new CrimeMapOverlay(drawable, this);

    populateCrimeOverlays(results);

    // Button to control food overlay
    violentCrimeButton = (Button) findViewById(R.id.showViolent);
    violentCrimeButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        toggleViolentOverlay();
      }
    }); 

    // Button to control access overlay
    propertyCrimeButton = (Button) findViewById(R.id.showProperty);
    propertyCrimeButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        togglePropertyOverlay();
      }
    });

    // Button to control access overlay
    otherCrimeButton = (Button) findViewById(R.id.showOther);
    otherCrimeButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        toggleOtherOverlay();
      }
    });
    
    toggleOtherOverlay();
    togglePropertyOverlay();
    toggleViolentOverlay();
  }

  public void onPause() {
    super.onPause();
    locationManager.removeUpdates(gps);
  }

  public void onDestroy() {
    super.onDestroy();
  }
  
  @Override
  protected boolean isRouteDisplayed() {
    return false;
  }

  public class GeoUpdateHandler implements LocationListener {

    public GeoUpdateHandler(GeoPoint startingLocation) {
      mapController.animateTo(startingLocation); // mapController.setCenter(point);
    }

    public void onLocationChanged(Location location) {
    }

    public void onProviderDisabled(String provider) {
    }

    public void onProviderEnabled(String provider) {
    }

    public void onStatusChanged(String provider, int status, Bundle extras) {
    }
    
    
  }

  private void populateCrimeOverlays(JSONArray results) {
    for (int i = 0; i < results.length(); i++) {
      JSONObject obj;
      try {
        obj = results.getJSONObject(i);
        String lng = obj.get("lng").toString();
        String lat = obj.get("lat").toString();
        // SDCrimeZoneApplication.debug(this, "mapping " + lat + ", " + lng);
        Double myLat = new Double(lat);
        Double myLng = new Double(lng);
        // String crime =
        // SDCrimeZoneApplication.bccMap.get(obj.get("bcc").toString());
        try {
          BccCodeEnum crimeEnum = BccCodeEnum.fromCode(obj.get("bcc").toString());

          String address = obj.get("address").toString();
          
          DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
          Date date = df.parse((obj.get("date").toString()));
          //System.out.println("got date: " + date.toString());
          //DateFormat df = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");  
          //String formattedDate = df.format(date);
          String formattedDate = "";
          if (date != null) {
            formattedDate = date.toString();
            System.out.println("date = " + formattedDate);
          }
          
          int iLat = (int) (myLat.doubleValue() * 1E6);
          int iLng = (int) (myLng.doubleValue() * 1E6);
          // create the marker for Maps view
          OverlayItem overlayItem = createMarker(iLat, iLng, crimeEnum.getName(), address + "\n( " + formattedDate + ")");

          switch (crimeEnum) {
          case MURDER:
          case RAPE:
          case ROBBERY:
          case ASSAULT:
            violentCrimeOverlay.addOverlay(overlayItem);
            break;
          case BURGLARY:
          case THEFT:
          case ARSON:
            propertyCrimeOverlay.addOverlay(overlayItem);
            break;
          default:
            otherCrimeOverlay.addOverlay(overlayItem);
          }
        } catch (IllegalArgumentException e) {
          // BCC code not in our system
          continue;
        } catch (ParseException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
      } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
  }

  private OverlayItem createMarker(int lat, int lng, String title, String subtext) {
    GeoPoint p = new GeoPoint(lat, lng);
    OverlayItem overlayItem = new OverlayItem(p, title, subtext);
    return overlayItem;
  }

  public void toggleViolentOverlay() {
    if (!violentIsDisplayed) {
      mapView.getOverlays().add(violentCrimeOverlay);
      violentCrimeButton.getBackground().setColorFilter(Color.LTGRAY, Mode.MULTIPLY);
    } else {
      mapView.getOverlays().remove(violentCrimeOverlay);
      violentCrimeButton.getBackground().setColorFilter(Color.WHITE, Mode.MULTIPLY);
    }
    violentIsDisplayed = !violentIsDisplayed;
    // Added symbols will be displayed when map is redrawn so force redraw now
    mapView.postInvalidate();
  }

  public void togglePropertyOverlay() {
    if (!propertyIsDisplayed) {
      mapView.getOverlays().add(propertyCrimeOverlay);
      propertyCrimeButton.getBackground().setColorFilter(Color.LTGRAY, Mode.MULTIPLY);
    } else {
      mapView.getOverlays().remove(propertyCrimeOverlay);
      propertyCrimeButton.getBackground().setColorFilter(Color.WHITE, Mode.MULTIPLY);
    }
    propertyIsDisplayed = !propertyIsDisplayed;
    // Added symbols will be displayed when map is redrawn so force redraw now
    mapView.postInvalidate();
  }

  public void toggleOtherOverlay() {
    if (!otherIsDisplayed) {
      mapView.getOverlays().add(otherCrimeOverlay);
      otherCrimeButton.getBackground().setColorFilter(Color.LTGRAY, Mode.MULTIPLY);
    } else {
      mapView.getOverlays().remove(otherCrimeOverlay);
      otherCrimeButton.getBackground().setColorFilter(Color.WHITE, Mode.MULTIPLY);
    }
    otherIsDisplayed = !otherIsDisplayed;
    // Added symbols will be displayed when map is redrawn so force redraw now
    mapView.postInvalidate();
  }

}

Java Source Code List

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