Your examples are great. They helped me a lot.
They are easy to understand and they are clear.

I am searching for a code, which gets me the longitude and the latitude.
My HelloGPSLocation is not working.

package de.photochallenge.HelloGPSLocation;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.widget.TextView;

public class HelloGPSLocation extends Activity {

volatile Location curLocation = null;
private LocationManager mLocationManager;

@Override
public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
//mLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
curLocation = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
//LocationProvider provider = mLocationManager.getProvider(“gps”);
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,100,1,gpsListener);

updateWithNewLocation(curLocation);
}

private void updateWithNewLocation(Location mLocation) {
String mText;

TextView myLocationText;
myLocationText = (TextView)findViewById(R.id.myLocationText);

if(mLocation != null){
double lat = mLocation.getLatitude();
double lng = mLocation.getLongitude();
String prov = mLocation.getProvider () ;

mText = “Latitude:” + lat + “\nLongitude:” + lng + “Provider:” + prov;
}
else {
mText = “No location found.”;
}
myLocationText.setText(mText);
}

private final LocationListener gpsListener = new LocationListener(){

public void onLocationChanged(Location curLocation)
{
updateWithNewLocation(curLocation);
}

public void onProviderDisabled(String provider){
updateWithNewLocation(null);
}

public void onProviderEnabled(String provider){}

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

}