Develop Reference

osmdroid get current user location

I am trying to implement OpenStreetMap using osmdroid. I successfully got the world map set to a particular set of geo co-ordinates. here is my code:
package com.example.re.osm;
//OSM MAP CODE
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import org.osmdroid.api.IMapController;
import org.osmdroid.config.Configuration;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.mylocation.GpsMyLocationProvider;
import org.osmdroid.views.overlay.mylocation.MyLocationNewOverlay;
public class MainActivity extends Activity {
private MapView mMapView;
private MyLocationNewOverlay locationOverlay;
#Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Context ctx = getApplicationContext();
//important! set your user agent to prevent getting banned from the osm servers
Configuration.getInstance().load(ctx, PreferenceManager.getDefaultSharedPreferences(ctx));
setContentView(R.layout.activity_main);
MapView map = (MapView) findViewById(R.id.map);
map.setTileSource(TileSourceFactory.MAPNIK);
map.setBuiltInZoomControls(true);
map.setMultiTouchControls(true);
/*IMapController mapController = map.getController();
mapController.setZoom(9);
GeoPoint startPoint = new GeoPoint(48.8583, 2.2944);
mapController.setCenter(startPoint);*/
//add
locationOverlay = new MyLocationNewOverlay(map);
mOsmOverlays.add(locationOverlay);
}
public void onResume(){
super.onResume();
//this will refresh the osmdroid configuration on resuming.
//if you make changes to the configuration, use
//SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
//Configuration.getInstance().save(this, prefs);
Configuration.getInstance().load(this, PreferenceManager.getDefaultSharedPreferences(this));
//add
locationOverlay.enableMyLocation();
}
public void onPause(){
super.onPause();
//add
locationOverlay.disableMyLocation();
}
}
The current version of osmdroid (5.6.5) is used.
Manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.re.osm"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<application
android:icon="#drawable/ic_launcher"
android:label="OSM" >
<activity
android:name=".MainActivity"
android:label="OSM" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
How do I get the current user location in this?. Should I also use resource proxy?
Thanks.

You can use MyLocationNewOverlay
...
GeoPoint startPoint = new GeoPoint(48.8583, 2.2944);
mapController.setCenter(startPoint);
//add
GpsMyLocationProvider provider = new GpsMyLocationProvider(this);
provider.addLocationSource(LocationManager.NETWORK_PROVIDER);
locationOverlay = new MyLocationNewOverlay(map, provider);
locationOverlay.enableFollowLocation();
locationOverlay.runOnFirstFix(new Runnable() {
public void run() {
Log.d("MyTag", String.format("First location fix: %s", locationOverlay.getLastFix()));
}
});
map.getOverlayManager().add(locationOverlay);
In onResume method in the activity then add:
public void onResume(){
super.onResume();
//this will refresh the osmdroid configuration on resuming.
//if you make changes to the configuration, use
//SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
//Configuration.getInstance().save(this, prefs);
Configuration.getInstance().load(this, PreferenceManager.getDefaultSharedPreferences(this));
//add
locationOverlay.enableMyLocation();
}
And in onPause
public void onPause(){
super.onResume();
//add
locationOverlay.disableMyLocation();
}
Where locationOverlay is obviously a field typed as MyLocationNewOverlay.
For more details check documentation for the class. There's also an example in the sample application.

How to find distance and travel route from current location to set marker

I am doing project on taxi fare calculation, my current location is displayed but i want to calculate distance and also show travel route from current location to other city using latitude..
please suggest n help...
Maps.java
package com.example.mainproject;
import java.util.List;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.widget.Toast;
import com.example.mainproject.R;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class Maps extends FragmentActivity implements LocationListener {
// Google Map
private GoogleMap googleMap;
private LocationManager locationManager;
private static final long MIN_TIME = 400;
private static final float MIN_DISTANCE = 1000;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.maps);
try {
// Loading map
initilizeMap();
// Changing map type
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
// googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
// googleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
// googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
// googleMap.setMapType(GoogleMap.MAP_TYPE_NONE);
// Showing / hiding your current location
googleMap.setMyLocationEnabled(true);
// Enable / Disable zooming controls
googleMap.getUiSettings().setZoomControlsEnabled(false);
// Enable / Disable my location button
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
// Enable / Disable Compass icon
googleMap.getUiSettings().setCompassEnabled(true);
// Enable / Disable Rotate gesture
googleMap.getUiSettings().setRotateGesturesEnabled(true);
// Enable / Disable zooming functionality
googleMap.getUiSettings().setZoomGesturesEnabled(true);
} catch (Exception e) {
e.printStackTrace();
}
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME,
MIN_DISTANCE, this); //You can also use LocationManager.GPS_PROVIDER and
LocationManager.PASSIVE_PROVIDER
}
#Override
public void onLocationChanged(Location location) {
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, 10);
googleMap.animateCamera(cameraUpdate);
locationManager.removeUpdates(this);
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) { }
#Override
public void onProviderEnabled(String provider) { }
#Override
public void onProviderDisabled(String provider) { }
#Override
protected void onResume() {
super.onResume();
initilizeMap();
}
/**
* function to load map If map is not created it will create it for you
* */
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(
R.id.map)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
}
map.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mainproject"
android:versionCode="1"
android:versionName="1.0" >
<permission
android:name="com.example.mainproject.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.mainproject.permission.MAPS_RECEIVE" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<!-- Requires OpenGL ES version 2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<uses-library android:name="com.google.android.maps" />
<activity
android:name="com.example.mainproject.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity class=".selectcity" android:label="selectcity"
android:name="com.example.mainproject.selectcity">
</activity>
<activity class=".About" android:label="About"
android:name="com.example.mainproject.About">
</activity>
<activity class=".entervalues" android:label="entervalues"
android:name="com.example.mainproject.entervalues">
</activity>
<activity class=".exit" android:label="exit" android:name="com.example.mainproject.exit">
</activity>
<activity class=".Maps" android:label="Maps" android:name="com.example.mainproject.Maps">
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIza***************`enter code here`"/>
<meta-data android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
</application>
</manifest>

For getting direction and distance from Google you have to do following:
Write this code on direction button's click listener or anywhere from that you want to show direction and distance.
String uri = "http://maps.google.com/maps?saddr="
+ source_latitude + "," + source_longitude + "&daddr="
+ destination_latitude + ","
+ destination_longitude;
Intent intent = new Intent(android.content.Intent.ACTION_VIEW,
Uri.parse(uri));
intent.setClassName("com.google.android.apps.maps",
"com.google.android.maps.MapsActivity");
startActivity(intent);

Need to place an icon on my google map in an android application using GPS coordinates

Thanks in advance, I'm having dificulties trying to display an icon on my current location in a mobile application using google maps. At the moment I'm able to retrieve the maps from Google maps android api v2 libraries using the using API key etc., and I am able to retrieve my own location on GPS coordinates, "latitude" and "longitude" as they can be displayed on the screen in two textViews in my mobile device. My problem now is how to use those coordinates to display with an icon my own location on the map. Obviously I'm doing something wrong when I try to implement it. I tried to implement it using overlays but I'm having plenty of errors. I don't know why or what way to take.
Here is my code. Any help I would really appreciate it.
thanks
This is my MainActivity.java
package com.example.location3;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.widget.TextView;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
public class MainActivity extends FragmentActivity {
TextView textLat;
TextView textLong;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Create reference
textLat = (TextView) findViewById(R.id.textLat);
textLong = (TextView) findViewById(R.id.textLong);
// create locationManager object
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// create LocationListener object (listen for changes in the location)
LocationListener ll = new myLocationListener();
// use lm location manager to get update
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);
}
// create a LocationListener to do what we want
class myLocationListener implements LocationListener {
GoogleMap map = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
// implemented method
#Override
public void onLocationChanged(Location location) {
if (location != null) {
// variables to get and store longitude and latitude
double pLong = location.getLongitude();
double pLat = location.getLatitude();
// set text to display values from longitude and latitude
textLat.setText(Double.toString(pLat));
textLong.setText(Double.toString(pLong));
}
}
// implemented method
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
// implemented method
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
// implemented method
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
}
This is my Activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Latitud"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="#+id/textLat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView1"
android:text=""
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textLong"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView3"
android:text=""
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textLat"
android:text="Longitud"
android:textAppearance="?android:attr/textAppearanceSmall" />
</RelativeLayout>
And this is my Manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.location3"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<permission
android:name="com.example.location3.permissions.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.location3.permission.MAP_RECEIVE" />
<!-- to be able to use it for mobiles -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<!-- Permision to use Internet to get the maps -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- Permision for the cache which is done in the external memory -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Permision to use google services -->
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<!-- Permision to be able to point in the map where the user is -->
<!-- Permision to use wifi net -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<!-- Permision to use GPS -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<uses-library
android:required="true"
android:name="com.google.android.maps" />
<activity
android:name="com.example.location3.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- API provided from Google -->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyCx00iNUdhMi9uyuCO9tTPwX4-nbi4wg6wx" />
</application>
</manifest>

you need to create a class which will handle the overlay wherever you want to pinup on the map. refer this tutorial here

try this :
class CurrentLocationOverlay extends ItemizedOverlay<OverlayItem>{
private ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>();
public CurrentLocationOverlay(Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
}
public CurrentLocationOverlay(Drawable defaultMarker , Context context) {
this(boundCenterBottom(defaultMarker));
}
#Override
protected OverlayItem createItem(int i) {
return mapOverlays.get(i);
}
#Override
public int size() {
return mapOverlays.size();
}
public void addOverlay(GeoPoint gp , String title , String msg) {
OverlayItem overlay = new OverlayItem(gp, title, msg);
mapOverlays.add(overlay);
this.populate();
}
}
add icon :
Drawable mDrawable = getResources().getDrawable(R.drawable.pinpoint);
GeoPoint point = new GeoPoint((int)(lat* 1E6) , (int)(lng* 1E6));
CurrentLocationOverlay currentLocationOverlay = new CurrentLocationOverlay(mDrawable);
currentLocationOverlay.addOverlay(point ,"" , "");
mapView.getOverlays().add(currentLocationOverlay);

error application when show map

I'm new to android
I'm trying make a simple app in android with google map, but when I run it in emulator look error
The Application MapGoogle (process com.jol.android.Mapgoogle) has stopped unexpectedly. Please try again.
This is my GoogleMap.java
package com.jol.android.Mapgoogle;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.RelativeLayout;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
public class Googlemaps extends MapActivity {
private MapController mapController;
private MapView mapView;
private LocationManager locationManager;
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.main); // bind the layout to the activity
// create a map view
RelativeLayout linearLayout = (RelativeLayout) findViewById(R.id.mapview);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapView.setStreetView(true);
mapController = mapView.getController();
mapController.setZoom(14); // Zoon 1 is world view
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new GeoUpdateHandler());
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
public class GeoUpdateHandler implements LocationListener {
#Override
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude() * 1E6);
int lng = (int) (location.getLongitude() * 1E6);
GeoPoint point = new GeoPoint(lat, lng);
mapController.animateTo(point); // mapController.setCenter(point);
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
}
and this is my manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jol.android.Mapgoogle"
android:versionCode="1"
android:versionName="1.0" >
<application
android:icon="#drawable/icon"
android:label="#string/app_name" >
<activity
android:name=".mapgoogle"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<uses-library
android:required="true"
android:name="com.google.android.maps" />
</application>
<uses-sdk android:minSdkVersion="9" />
</manifest>
This my main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.google.android.maps.MapView
android:id="#+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:apiKey="0Qe1BE05sZZFeWkfqemBVn-tw_Y_Kc9E40HpY-w" />
</RelativeLayout>
But when I run this program I got this error
The Application MapGoogle (process com.jol.android.Mapgoogle) has stopped unexpectedly. Please try again.
Why like this? Please help me. Thank you, mate.

Try this
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
mobiForge: Using Google Maps in Android

You have several problems, the main one being the line:
RelativeLayout linearLayout = (RelativeLayout) findViewById(R.id.mapview);
It's an illegal cast and it does nothing - get rid of it!
As a matter of style your package should be all lower case, make it
package com.jol.android.mapgoogle;
Make sure you compilation unit is called Googlemaps.java and that it matches the class name.
As other posters have pointed out, you need certain permissions in the manifest. This manifest should work and match the other changes I have mentioned.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jol.android.mapgoogle"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-sdk android:minSdkVersion="9" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".Googlemaps"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<uses-library
android:name="com.google.android.maps"
android:required="true" >
</uses-library>
</application>
</manifest>
.

You need to add following tag in your manifest file
<application >
<activity>
<uses-library android:name="com.google.android.maps" />
</activity>
</application>

Put this in the manifest:
<uses-permission android:name="android.permission.INTERNET">

Android: how to open a Google Map?

I have an activity which extends MapActivity. After running the activity, the Google Map should be shown on the emulator.
How can I do that?

http://www.vogella.de/articles/AndroidLocationAPI/article.html#overview_maps
This link got what u need.
i did it. and it works for me as well..
Just move to the 4th topic from the Index. (Google Maps)
Thanks
UPDATED:
Menifest File:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.vogella.android.locationapi.maps" android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10" />
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".ShowMap" android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<uses-library android:required="true" android:name="com.google.android.maps"></uses-library>
</application>
XML LayoutFile:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainlayout"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.google.android.maps.MapView
android:id="#+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:apiKey="Your Maps API Key"
/>
</RelativeLayout>
ACtivity:
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
public class ShowMap extends MapActivity {
private MapController mapController;
private MapView mapView;
private LocationManager locationManager;
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.main); // bind the layout to the activity
// create a map view
RelativeLayout linearLayout = (RelativeLayout) findViewById(R.id.mainlayout);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapView.setStreetView(true);
mapController = mapView.getController();
mapController.setZoom(14); // Zoon 1 is world view
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, new GeoUpdateHandler());
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
public class GeoUpdateHandler implements LocationListener {
#Override
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude() * 1E6);
int lng = (int) (location.getLongitude() * 1E6);
GeoPoint point = new GeoPoint(lat, lng);
mapController.animateTo(point); // mapController.setCenter(point);
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
}

for starting mapview then follow this mapview's link

You have to signup here and then insert the code provided in your layout like this:
<com.google.android.maps.MapView
android:id="#+id/map_map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:apiKey="***************************************"
/>

You can refer this link, http://developer.android.com/resources/tutorials/views/hello-mapview.html
Check if you have provided your Map API key properly. This link has helped me to display the map with my present location.