Android Open Source - GeoPosts View Map

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Back to project page GeoPosts.

License

The source code is released under:

GNU General Public License

Java Source Code

package org.surrel.geoposts;
/*w  w w .j  av  a  2 s .  c  o m*/
import java.util.Date;
import java.util.List;

import android.app.Activity;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMarkerClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptor;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

public class ViewMap extends Activity implements OnMarkerClickListener {

  private GoogleMap map;

  @Override
  public void onCreate(Bundle icicle)
  { 
    super.onCreate(icicle);
    setContentView(R.layout.activity_get_location);
    
    SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    Boolean engl = settings.getBoolean("English", true);
    Boolean ital = settings.getBoolean("Italian", true);
    Boolean germ = settings.getBoolean("German", true);
    Boolean fren = settings.getBoolean("French", true);
    Boolean comm = settings.getBoolean("Comment", true);
    Boolean reco = settings.getBoolean("Recommendation", true);
    Boolean sp_e = settings.getBoolean("Special_event", true);
    String per = settings.getString("geoperimeter", "10km");
    
    Double perimeter = (double)( Integer.parseInt( (per).replaceAll("[^0-9.]", "") ) );
    Integer en = bool_to_int(engl);
      Integer fr = bool_to_int(fren);
      Integer it = bool_to_int(ital);
      Integer ge = bool_to_int(germ);
      Integer com = bool_to_int(comm);
      Integer recom = bool_to_int(reco);
      Integer spec  = bool_to_int(sp_e);

    map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();

    map.setMyLocationEnabled(true);

    LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);  
    List<String> providers = lm.getProviders(true);
    // Loop over array and if we get an accurate location we break out the loop
    Location my_latlon = null;
    for(int i=providers.size()-1; i>=0; i--)
    {
      my_latlon = lm.getLastKnownLocation(providers.get(i));
      if (my_latlon != null) break;
    }

    // Open read access for local database
    NotesDbHelper notesDbHelper = new NotesDbHelper(getApplicationContext());
    SQLiteDatabase db = notesDbHelper.getReadableDatabase();
    String[] columns = new String[]{
        "ID", "lat", "lon", "title",
        "text", "user", "karma", "creation",
        "lifetime", "lang", "cat", "creation + lifetime AS expiration"
    };

    int currentTime = (int) ((new Date().getTime())/1000);
    Log.i("Current time", String.valueOf(currentTime/1000));

    String[] selectionArgs = new String[]{
        String.valueOf(perimeter),
        String.valueOf(my_latlon.getLatitude()),
        String.valueOf(my_latlon.getLatitude()),
        String.valueOf(my_latlon.getLongitude()),
        String.valueOf(my_latlon.getLongitude()),
        // TODO: get this filter working. Works fine out of SQL request
        //String.valueOf(currentTime),
        String.valueOf(recom),
        String.valueOf(0),
        String.valueOf(com),
        String.valueOf(1),
        String.valueOf(spec),
        String.valueOf(2),
        String.valueOf(en),
        "en",
        String.valueOf(it),
        "it",
        String.valueOf(ge),
        "ge",
        String.valueOf(fr),
        "fr"
    };

    Log.e("Success", "before filtering");
    Cursor result = db.query(
        "notes",
        columns,
        "( (?*360/40075) > ( (?-lat)*(?-lat) + (?-lon)*(?-lon) ) ) " +
            // TODO: get this filter working. Works fine out of SQL request
            //"AND ? < expiration " +
            "AND ((? AND (cat = ?)) OR (? AND (cat = ?)) OR (? AND (cat = ?)) ) " +    
            "AND ((? AND (lang = ?)) OR (? AND (lang = ?)) OR (? AND (lang = ?)) OR (? AND (lang = ?)))",
            selectionArgs,
            null, null, null); // Not grouping, filtering or sorting

    Log.e("Success","filtering done successfully !!");

    if(result.moveToFirst())
    {
      do
      {
        // TODO: get this filter working. Works fine out of SQL request
        if(currentTime < result.getInt(result.getColumnIndex("expiration")))
        {
          int id = result.getInt(result.getColumnIndex("ID"));
          LatLng latlng = new LatLng(
              result.getDouble(result.getColumnIndex("lat")),
              result.getDouble(result.getColumnIndex("lon"))
              );
          int cat = result.getInt(result.getColumnIndex("cat"));

          int resId;
          switch(cat)
          {
          case 0:
            resId = R.drawable.recommendation_icon;
            break;
          case 1:
            resId = R.drawable.comment_icon;
            break;
          case 2:
            resId = R.drawable.special_event_icon;
            break;
          default:
            resId = R.drawable.ic_launcher;
          }
          BitmapDescriptor geoicon = BitmapDescriptorFactory.fromResource(resId);

          map.addMarker(new MarkerOptions().position(latlng)
              .icon(geoicon)
              .anchor(0.5f,0.5f)
              .alpha(0.5f)
              .title(String.valueOf(id))
              );

          map.setOnMarkerClickListener(new OnMarkerClickListener()
          {
            @Override
            public boolean onMarkerClick(Marker marker) {
              Intent intent = new Intent();
              intent.setClass(ViewMap.this, ViewGeopost.class);

              intent.putExtra("id", marker.getTitle());

              startActivity(intent);
              return true;
            }
          });
        }
      } while(result.moveToNext());
    }
  }

  @Override
  public boolean onMarkerClick(Marker marker) {
    return true;
  }

  public Integer bool_to_int (Boolean bool) {
    if ( bool.equals(Boolean.TRUE) )
    {
      return 1;
    }
    else { 
      return 0;
    }  
  }
}

Java Source Code List

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