Android Open Source - pawang-ujan G P S Tracker

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License

The source code is released under:

Apache License

Java Source Code

package com.salatiga.code;
/* w  w w.  j a  va 2  s  . c  o  m*/
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;

/**
 * Class ini digunakan untuk mendapatkan posisi latitude dan longitude
 * @author Hendro Steven Tampake
 * @version 1.0
 *
 */
public class GPSTracker extends Service implements LocationListener {

  private final Context mContext;

  // flag for GPS status
  boolean isGPSEnabled = false;

  // flag for network status
  boolean isNetworkEnabled = false;

  // flag for GPS status
  boolean canGetLocation = false;

  Location location; // location
  double latitude; // latitude
  double longitude; // longitude

  // The minimum distance to change Updates in meters
  private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 500; 

  // The minimum time between updates in milliseconds
  private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 30; // 1 minute

  // Declaring a Location Manager
  protected LocationManager locationManager;

  public GPSTracker(Context context) {
    this.mContext = context;
    getLocation();
  }

  public Location getLocation() {
    try {
      locationManager = (LocationManager) mContext
          .getSystemService(LOCATION_SERVICE);

      // getting GPS status
      isGPSEnabled = locationManager
          .isProviderEnabled(LocationManager.GPS_PROVIDER);

      // getting network status
      isNetworkEnabled = locationManager
          .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

      if (!isGPSEnabled && !isNetworkEnabled) {
        // no network provider is enabled
      } else {
        this.canGetLocation = true;
        // First get location from Network Provider
        if (isNetworkEnabled) {
          locationManager.requestLocationUpdates(
              LocationManager.NETWORK_PROVIDER,
              MIN_TIME_BW_UPDATES,
              MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
          Log.d("Network", "Network");
          if (locationManager != null) {
            location = locationManager
                .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            if (location != null) {
              latitude = location.getLatitude();
              longitude = location.getLongitude();
            }
          }
        }
        // if GPS Enabled get lat/long using GPS Services
        if (isGPSEnabled) {
          if (location == null) {
            locationManager.requestLocationUpdates(
                LocationManager.GPS_PROVIDER,
                MIN_TIME_BW_UPDATES,
                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
            Log.d("GPS Enabled", "GPS Enabled");
            if (locationManager != null) {
              location = locationManager
                  .getLastKnownLocation(LocationManager.GPS_PROVIDER);
              if (location != null) {
                latitude = location.getLatitude();
                longitude = location.getLongitude();
              }
            }
          }
        }
      }

    } catch (Exception e) {
      e.printStackTrace();
    }

    return location;
  }

  /**
   * Stop using GPS listener Calling this function will stop using GPS in your
   * app
   * */
  public void stopUsingGPS() {
    if (locationManager != null) {
      locationManager.removeUpdates(GPSTracker.this);
    }
  }

  /**
   * Function to get latitude
   * */
  public double getLatitude() {
    if (location != null) {
      latitude = location.getLatitude();
    }

    // return latitude
    return latitude;
  }

  /**
   * Function to get longitude
   * */
  public double getLongitude() {
    if (location != null) {
      longitude = location.getLongitude();
    }

    // return longitude
    return longitude;
  }

  /**
   * Function to check GPS/wifi enabled
   * 
   * @return boolean
   * */
  public boolean canGetLocation() {
    return this.canGetLocation;
  }

  /**
   * Function to show settings alert dialog On pressing Settings button will
   * lauch Settings Options
   * */
  public void showSettingsAlert() {
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

    // Setting Dialog Title
    alertDialog.setTitle("GPS is settings");

    // Setting Dialog Message
    alertDialog
        .setMessage("GPS is not enabled. Do you want to go to settings menu?");

    // On pressing Settings button
    alertDialog.setPositiveButton("Settings",
        new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent(
                Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            mContext.startActivity(intent);
          }
        });

    // on pressing cancel button
    alertDialog.setNegativeButton("Cancel",
        new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
          }
        });

    // Showing Alert Message
    alertDialog.show();
  }

  @Override
  public void onLocationChanged(Location location) {
  }

  @Override
  public void onProviderDisabled(String provider) {
  }

  @Override
  public void onProviderEnabled(String provider) {
  }

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

  @Override
  public IBinder onBind(Intent arg0) {
    return null;
  }

}

Java Source Code List

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