package se.nekotronic.simplegps;

import java.text.DecimalFormat;

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.text.format.Time;
import android.widget.TextView;

public class SimpleGPSTestActivity extends Activity {
    private TextView texten = null;
    private LocationManager location_manager;
    private LocationListener location_listener;

    private void print(String text) {
        Time now = new Time();
        now.setToNow();
        String timeString = now.format("%H:%M:%S");
        String line = timeString + ": " + text + "\n";
        texten.setText(texten.getText() + line);
        texten.invalidate();
        texten.postInvalidate();
    }

    DecimalFormat dec = new DecimalFormat("0.0000");

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        texten = new TextView(this);
        texten.setText("");
        setContentView(texten);

        print("onCreate");

        location_manager =
            (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
        
        location_listener = new LocationListener() {
            @Override
            public void onLocationChanged(Location location) {
                double longitude = location.getLongitude();
                double latitude = location.getLatitude();
                double accuracy = location.getAccuracy();
                double altitude= location.getAltitude();
                print("New location: Long " + dec.format(longitude) +
                      ", lat " + dec.format(latitude) +
                      ", accuracy " + dec.format(accuracy) +
                      ", alt " + dec.format(altitude));
            }
            
            @Override
            public void onProviderDisabled(String provider) {
                 print("Location provider has been disabled.");
            }

            @Override
            public void onProviderEnabled(String provider) {
                 print("Good news! Location provider has been enabled.");
            }

            @Override
            public void onStatusChanged(String provider, int status,
                    Bundle extras) {
                if (status == LocationProvider.OUT_OF_SERVICE)
                    print("GPS status changed to OUT_OF_SERVICE.");
                else if (status == LocationProvider.TEMPORARILY_UNAVAILABLE)
                    print("GPS status changed to TEMPORARILY_UNAVAILABLE.");
                else if (status == LocationProvider.AVAILABLE)
                    print("Good news! GPS status changed to AVAILABLE.");
            }
        };
    }

    @Override
    protected void onPause() {
        super.onPause();
        print("onPause");
        location_manager.removeUpdates(location_listener);
    }

    @Override
    protected void onResume() {
        super.onResume();
        print("onResume");
        try {
            // Register the listener with the Location Manager to receive
            // location updates
            location_manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, location_listener);
        }
        catch (Exception e) {
            print("Couldn't use the GPS: " + e + ", " + e.getMessage());
        }
    }
}