How to use updated gps location data in main android activity?

I have googled alot of questions and forums and could not find an answer so I hope this question does not repeat. If so, please direct me to the primary question.

Ok the thing is I do not know how to update gps location in android and then actually use this value in main activity. So I have a layout composed of two TextViews, one displaying longitude and another for displaying latitude. I have set one LocationManager, LocationListener (to update location) and then i call requestLocationUpdates() on my LocationManager as instructed in this tutorial http://www.firstdroid.com/2010/04/29/android-development-using-gps-to-get-current-location-2/

I use same onCreate and LocationListener methods as in tutorial above. As you can see onLocationChanged() makes a toast in this tutorial, but I would like to change text of my TextViews. Could you please show me how can I use values from getLongitude() (and similar methods) in my main activity.

public void onLocationChanged(Location loc)

{

loc.getLatit开发者_如何学Cude();

loc.getLongitude();

String Text = “My current location is: “ +

“Latitud = “ + loc.getLatitude() +

“Longitud = “ + loc.getLongitude();

Toast.makeText( getApplicationContext(),

Text,

Toast.LENGTH_SHORT).show();

}

in your main activity, after onCreate and setContentView you need

EditText lat = new EditText findViewById(R.id.lat_view);
EditText lon = new EditText findViewById(R.id.lon_view);

(or whatever your lat & lon textviews are called in xml)

and then in your onLocationChanged add

lat.setText(loc.getLatitude);
lon.setText(loc.getLongitude);

you might need to make the EditTexts static, im not in front of eclipse atm.

from your main activity pass the textview in constructor of MyLocationListener(referring to tutorial you used).So basically you have to define a constructor in MyLocationListener

public class MyLocationListener implements LocationListener {
   Context context;
   TextView tv;      

   public MyLocationListener(Context context,TextView tv){
    this.context=context;
    this.tv=tv;
   }

  public void onLocationChanged(Location loc) {
      tv.setText("your text comes here");
  }      


} 

and in main activity

TextView tv = (TextView) findViewById(R.id.yourTextViewId);
LocationListener mlocListener = new MyLocationListener(getApplicationContext(),tv);