Question

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Android AVD wifi error

I am working with Android, and I want to show current latitude value in textbox and current longitude value in another textbox. And I wrote the below code, but it is not working. It is not setting any latitude or longitude value in the corresponding textbox. Is there any problem with my code?

public class MainActivity extends Activity implements LocationListener {
    private TextView latituteField;
    private TextView longitudeField;
    private LocationManager locationManager;
    private String provider;

    private static final String TAG = "CurrentLocation";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        latituteField = (TextView) findViewById(R.id.lat1);
        longitudeField = (TextView) findViewById(R.id.lat2);

     // Get the location manager
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        // Define the criteria how to select the location provider -> use
        // default
        Criteria criteria = new Criteria();
        provider = locationManager.getBestProvider(criteria, false);
        locationManager.requestLocationUpdates(provider, 0, 0, this);
        Location location = locationManager.getLastKnownLocation(provider);
        onLocationChanged(location);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        locationManager.removeUpdates(this);
    }

    @Override
    public void onLocationChanged(Location location) {
       if (location != null) {
           System.out.println("Provider " + provider + " has been selected.");
           int lat = (int) (location.getLatitude());
           int lng = (int) (location.getLongitude());
           Log.e("GPS", "location changed: lat="+lat+", lon="+lng);
           latituteField.setText(String.valueOf(lat));
           longitudeField.setText(String.valueOf(lng));
       } else {
           latituteField.setText("Provider not available");
           longitudeField.setText("Provider not available");
       }
    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }
}

Or I need to do something such as passing latitude or longitude value from somwhere? Or it will automatically get the current location value?

I have these in my manifest file-

<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_LOCATION_EXTRA_COMMANDS" />
    <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
    <uses-permission android:name="android.permission.CONTROL_LOCATION_UPDATES" />
    <uses-permission android:name="android.permission.INTERNET" />

Anything else I need to add?

And also I am getting this error when I saw in logCAT

07-18 22:43:59.836: E/Trace(3410): error opening trace file: No such file or directory (2)

I am getting in my textbox as Provider Not Available as it is going to else loop.

Answer 1

As you mentioned in the comment that you are running your code from eclipse. Let me tell you that, can not fetch the real GPS Co-Ordinates in Eclipse. However you can simulate it by load .gpx file in to DDMS.

Have a visit my answer for same purpose.