Question

I have a problem,

The locationmanager is working perfectly fine when i test it in the emulator and edit the location in the DDMS screen, but when i test it on the Samsung Galaxy SII, its nog working..

Please help me.

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class LbsGeocodingActivity extends Activity {

    private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 0; // in Meters
    private static final long MINIMUM_TIME_BETWEEN_UPDATES = 1000; // in Milliseconds

    protected LocationManager locationManager;

    protected Button retrieveLocationButton;

    @Override
    public void onCreate(Bundle savedInstanceState) {

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

        retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button);

        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MINIMUM_TIME_BETWEEN_UPDATES, MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, new MyLocationListener());

        retrieveLocationButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                showCurrentLocation();
            }
        });        
    }    

    public String getMyPhoneNumber(){
        TelephonyManager mTelephonyMgr;
        mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); 
        return mTelephonyMgr.getLine1Number();
    }

    protected void showCurrentLocation() {

        Location location =   locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

        if (location != null) {
            String message = String.format("Current Location \n  Longitude: %1$s \n Latitude: %2$s \n %3$s ", location.getLongitude(), location.getLatitude(), getMyPhoneNumber());
            Toast.makeText(LbsGeocodingActivity.this, message, Toast.LENGTH_LONG).show();
        }

    }   

    private class MyLocationListener implements LocationListener {

    public void onLocationChanged(Location location) {
        String message = String.format(
                "New Location \n Longitude: %1$s \n Latitude: %2$s \n  %3$s ",
                location.getLongitude(), location.getLatitude(),   getMyPhoneNumber()
        );
        Toast.makeText(LbsGeocodingActivity.this, message,   Toast.LENGTH_LONG).show();
    }

    public void onStatusChanged(String s, int i, Bundle b) {
        Toast.makeText(LbsGeocodingActivity.this, "Provider status changed",
                Toast.LENGTH_LONG).show();
    }

    public void onProviderDisabled(String s) {
        Toast.makeText(LbsGeocodingActivity.this,
                "Provider disabled by the user. GPS turned off",
                Toast.LENGTH_LONG).show();
    }

    public void onProviderEnabled(String s) {
        Toast.makeText(LbsGeocodingActivity.this,
                "Provider enabled by the user. GPS turned on",
                Toast.LENGTH_LONG).show();
    }

}
}

In the permissions i have:

ACCES_COURSE_LOCATION
ACCES_FINE_LOCATION

Answer 1

It could be a problem with your incorrect usage of String.format(). Sometimes this can cause weird, device-specific issues. Try,

String lon = "" + location.getLongitude();
String lat = "" + location.getLatitude();
String num = getMyPhoneNumber();

String message = String.format(
    "New Location \n Longitude: %1$s \n Latitude: %2$s \n %3$s",
    lon,
    lat,
    num
);

---

Have you tried using this?

LocationManager lm = (LocationManager)act.getSystemService(Context.LOCATION_SERVICE);
Criteria crit = new Criteria();
crit.setAccuracy(Criteria.ACCURACY_FINE);
String provider = lm.getBestProvider(crit, true);
Location loc = lm.getLastKnownLocation(provider);