Develop Reference

How to get location without internet using intent service?

I don't want to use service which is continuously running in background ! Actually in my project user will send SMS command from any smartphone to his/her misplaced smartphone.My app will detect that particular "SMS command" and in return it will send the current location of misplaced mobile.
can it be done through intent service ? I m damn confused ... Its single time operation how to perform it efficiently ... ?

by using NETWORK_PROVIDER getting geolocation
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
makeUseOfNewLocation(location);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
and add this permission in manifest.xml
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

Getting the Location even if LocationServices is turned off

In Android if LocationServices is disabled, is there any way that I can get the current location through wifi/network. I know there is one way of showing the user a popup to change his LocationSettings , but I don't want to show the popup.
So is there any way of getting the current location even if LocationServices is disabled ?

use LocationManager.NETWORK_PROVIDER instead of LocationManager.GPS_PROVIDER
The entire code and how to use is given here :
http://developer.android.com/guide/topics/location/strategies.html
// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
makeUseOfNewLocation(location);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);

Yes of course, you can use:
// let Android select the right location provider for you
String myProvider = locationManager.getBestProvider(myCriteria, true);
check this for more details good-way-of-getting-the-users-location-in-android and this Location Strategies

How to current location in Android using google Maps?

I'm trying to get the user's Location by showing that he is in which area with Particular location in google maps with the help of Android API while surfing in internet I came to know that getLocationManger() is used to view the Location but it shows only by Latitude,Longitude.
If someone have any idea about this please help me friends.

You can get the user's current location in terms of latitude and longitude and simply make an Implicit Intent to launch map with these values.
To get current location:
LocationManager locationManager = (LocationManager) MainActivity.this.getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
//Toast.makeText(getApplicationContext(),"Entered onLocationChanged",Toast.LENGTH_SHORT).show();
Log.d("LIFECYCLE","Entered onLocationChanged");
lat = location.getLatitude();
lon = location.getLongitude();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
#Override
public void onProviderEnabled(String provider) {}
#Override
public void onProviderDisabled(String provider) {}
};
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
To show on google map:
Intent intent = null,chooser = null;
intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("geo:"+lat+","+lon));
chooser = Intent.createChooser(intent,"Launch Maps");
startActivity(chooser);
/* creating chooser because:
If this is not done, your app may crash when run on the emulator because the emulator may not have an activity installed which can handle the intent.*/

Try this one
LocationManager lm = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
Location net_loc = null;
lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
you can get the current location from net_loc.

Getting 0.0 for longitude and latitude on tablet

I am getting longitude=0.0 and latitude=0.0 on tablet while this is working perfectly on the phone.
I am using LocationManager.NETWORK_PROVIDER and not the GPS_PROVIDER so what could be the cause please?
Logcat output??
that's my code:
// Acquire a reference to the system Location Manager
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
longitude=location.getLongitude();
latitude=location.getLatitude();
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
//Or use LocationManager.GPS_PROVIDER
String locationProvider = LocationManager.NETWORK_PROVIDER;
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(locationProvider, 0, 0, locationListener);
Location lastKnownLocation = locationManager.getLastKnownLocation(locationProvider);
if(lastKnownLocation!=null){
longitude=lastKnownLocation.getLongitude();
latitude=lastKnownLocation.getLatitude();
}

Check out Location settings inside your device settings. This seems not a problem with your code, but your device settings. In my Ginger bread, it's as:
Settings -> Location&security -> Use wireless networks

why my gps is not triggered?

i have a problem with my app getting my GPS position.
first of all i have the two things in my manifest:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
then i have a code like this for the location:
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
makeUseOfNewLocation(location);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
locationManager.requestLocationUpdates(0l, 0f, new Criteria(), locationListener, Looper.getMainLooper());
now the strange thing:
when i have wifi enabled and i'm in my network, i get a position. If i have only GPS enabled i dont get my position. even i dont see the gps icon at the top of the phone which shows when a app makes use of my gps.
what is wrong here?

For GPS:
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
For Network:
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);