Get Current Location (GPS Position) in Android Native Java Code

Get Current Location (GPS Position) in Android Native Java Code

Generally till now while developing Android Apps or I should say PhoneGap Supported Apps, to get the current GPS location, I always referred to the following function:

navigator.geolocation.getCurrentPosition(onSuccess, onError);

which instantly gives all the required location details like latitude, longitude, accuracy etc.

But then, how do I get these details which I'm not using a web app or I should say not a PhoneGap Application but a pure native Android Application or an Android Service, So for the same I tried researching  on the various articles and documents and finally arrived at the solution as follows:

package com.mayuri.location;
import java.sql.Timestamp;
import java.util.Date;
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.util.Log; 
import android.widget.TextView;
import android.widget.Toast;


public class LocationSample extends Activity {   
TextView tv;
    @Override 
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);         
    tv = (TextView)this.findViewById(R.id.txtLocation);
    LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    LocationListener ll = new mylocationlistener();

    lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, ll);    

    }  

    private class mylocationlistener implements LocationListener {

    @Override 

    public void onLocationChanged(Location location) {    

     Date today = new Date();  

Timestamp currentTimeStamp = new Timestamp(today.getTime());

        if (location != null) {

        Log.d("LOCATION CHANGED", location.getLatitude() + "");

        Log.d("LOCATION CHANGED", location.getLongitude() + "");

        Strig str = "\n CurrentLocation: "+
        "\n Latitude: "+ location.getLatitude() + 
        "\n Longitude: " + location.getLongitude() + 
        "\n Accuracy: " + location.getAccuracy() + 
        "\n CurrentTimeStamp "+ currentTimeStamp;         
          Toast.makeText(LocationSample.this,str,Toast.LENGTH_LONG).show();
          tv.append(str);               
        } 
    } 
    @Override
    public void onProviderDisabled(String provider) {
    Toast.makeText(LocationSample.this,"Error onProviderDisabled",Toast.LENGTH_LONG).show();
    }    
    @Override
    public void onProviderEnabled(String provider) {
    Toast.makeText(LocationSample.this,"onProviderEnabled",Toast.LENGTH_LONG).show();
    }
    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    Toast.makeText(LocationSample.this,"onStatusChanged",Toast.LENGTH_LONG).show();
    }
    }
}

The heart of the Logic lies in the 'LocationManager' class, which provides an access to the System location services.  

'requestLocationUpdates' gives the periodic location updates as per the arguments specified.

The method, 'onLocationChanged' of the Interface 'LocationListener' gives the entire location details like Latitude, Longitude, Accuracy etc which can be used as per our requirements, currently In the example I'm periodically updating the text view as well as showing the Toast Popup of the location details along with the Current Timestamp.

Most Important thing to be remembered while using the LocationService in Android Application is to modify the Application manifest file with the following,

        <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.INTERNET" />    
        <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />


Thats all on this from my end!!

Happy Coding :-))

~ Mayuri



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