Question

*Please tell me how to set the Geo-point to current location on start of program? I want to set an overlay balloon to current location of user in emulator on starting of the program marked as “you are here”. My Code is here-*

package com.jbb;

import java.util.List;
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.Overlay;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.MotionEvent;
import android.widget.Toast;


public class jbb_latitudeActivity extends MapActivity 
{    
    LocationManager lm;
    MyLocationListener locationListener;
    MapView mapView;
    MapController mc;
    GeoPoint geoPoint;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        try{
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main); 
        geoPoint = new GeoPoint( (int) (12.949997* 1E6), (int) (80.140213 * 1E6));
        mapView = (MapView) findViewById(R.id.name);
        mc = mapView.getController();
        mc.animateTo(geoPoint);
        mapView.setClickable(true);
        mapView.setBuiltInZoomControls(true);
        mapView.setSatellite(true);
        mapView.setTraffic(true);
        List<Overlay> overlays = mapView.getOverlays();
                overlays.clear();
        overlays.add(new MyLocationListener());
        //---use the LocationManager class to obtain GPS locations---
        lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);    
        lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,new MyLocationListener());
        }
    catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(getApplicationContext(),e.toString() , 1).show();
    }

        }
   @Override
    protected boolean isRouteDisplayed() {
        // TODO Auto-generated method stub
        return false;
    }        

    private class MyLocationListener extends Overlay implements LocationListener 
    {
          public void draw(Canvas canvas, MapView mapView, boolean shadow) {                              // 1
            super.draw(canvas, mapView, shadow);
                if (!shadow) {                                                                              // 2
                    Point point = new Point();
                    mapView.getProjection().toPixels(geoPoint, point);                                      // 3
                    Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.marker_default);   // 4
                    int x = point.x - bmp.getWidth() / 2;                                                   // 5                   inty=point.ybmp.getHeight();                                                      // 6         canvas.drawBitmap(bmp,x,y,null);                                                     // 7
                }
            }
         public boolean onTouchEvent(MotionEvent event, MapView mapView) 
        {   
            //---when user lifts his finger---
            if (event.getAction() == 1) {                
                GeoPoint p = mapView.getProjection().fromPixels(
                    (int) event.getX(),
                    (int) event.getY());
            }                            
            return false;
        }
         public boolean onTap(GeoPoint point, MapView mapView) 
         {

           String msg = "Lat:: " + point.getLatitudeE6()/1E6 + " - " + 
                        "Lon:: " + point.getLongitudeE6()/1E6;
          Toast.makeText(mapView.getContext(), msg,1).show();
          return true;
         }
        @Override
        public void onLocationChanged(Location loc) {
            if (loc != null) {                
                Toast.makeText(mapView.getContext(), 
                    "Location changed : Lat: " + loc.getLatitude() + 
                    " Lng: " + loc.getLongitude(), 
                    1).show();

                GeoPoint p = new GeoPoint(
                        (int) (loc.getLatitude() * 1E6), 
                        (int) (loc.getLongitude() * 1E6));
                mc.animateTo(p);
                mc.setZoom(15);                
                mapView.invalidate();    
            }
        }
        @Override
        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub
            Toast.makeText(mapView.getContext(), "hee", 1).show();
        }
        @Override
        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub
            Toast.makeText(mapView.getContext(), "hee", 1).show();
        }
        @Override
        public void onStatusChanged(String provider, int status, 
            Bundle extras) {
            // TODO Auto-generated method stub
            Toast.makeText(mapView.getContext(), "hee", 1).show();
        }
    }    
}

Answer 1

First,you should have added the permission

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"></uses-permission> 

Then try,

Criteria criteria = new Criteria();
String bestProvider = locationManager.getBestProvider(criteria, true);
Location location = locationManager.getLastKnownLocation(bestProvider); 
locationManager.requestLocationUpdates(bestProvider, 0, 0, new TestLocationListener());

instead of,

lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);    
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,new MyLocationListener());