android - Using gps get the distance a person has walked

Question

guys i am able to get the current location longitude and Latitude using the below code. I have two buttons Start walking and Stop Walking.

Onclick of Start Walking it will get the current location(longitude and Latitude) the person will start walking from A(source) position and walks from some time and comes back to A(now it becomes destination),after that he clicks on stop walking button.

Now i need to show the user these details:

1.Distance that he walked in Kms.

2.Time he took in minutes.

(optional)3.speed or average speed.

**

Code for getting the current location

**

private EditText editTextShowLocation;
    private Button buttonGetLocation;
    private ProgressBar progress;

    private LocationManager locManager;
    private LocationListener locListener = new MyLocationListener();

    private boolean gps_enabled = false;
    private boolean network_enabled = false;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        editTextShowLocation = (EditText) findViewById(R.id.editTextShowLocation);

        progress = (ProgressBar) findViewById(R.id.progressBar1);
        progress.setVisibility(View.GONE);

        buttonGetLocation = (Button) findViewById(R.id.buttonGetLocation);
        buttonGetLocation.setOnClickListener(this);

        locManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
    }

    @Override
    public void onClick(View v) {
        progress.setVisibility(View.VISIBLE);
        // exceptions will be thrown if provider is not permitted.
        try {
            gps_enabled = locManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
        } catch (Exception ex) {
        }
        try {
            network_enabled = locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
        } catch (Exception ex) {
        }

        // don't start listeners if no provider is enabled
        if (!gps_enabled && !network_enabled) {
            AlertDialog.Builder builder = new Builder(this);
            builder.setTitle("Attention!");
            builder.setMessage("Sorry, location is not determined. Please enable location providers");
            builder.setPositiveButton("OK", this);
            builder.setNeutralButton("Cancel", this);
            builder.create().show();
            progress.setVisibility(View.GONE);
        }

        if (gps_enabled) {
            locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locListener);
        }
        if (network_enabled) {
            locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locListener);
        }
    }

    class MyLocationListener implements LocationListener {
        @Override
        public void onLocationChanged(Location location) {
            if (location != null) {
                // This needs to stop getting the location data and save the battery power.
                locManager.removeUpdates(locListener); 

                String londitude = "Londitude: " + location.getLongitude();
                String latitude = "Latitude: " + location.getLatitude();
                String altitiude = "Altitiude: " + location.getAltitude();
                String accuracy = "Accuracy: " + location.getAccuracy();
                String time = "Time: " + location.getTime();

                editTextShowLocation.setText(londitude + "
" + latitude + "
" + altitiude + "
" + accuracy + "
" + time);
                progress.setVisibility(View.GONE);
            } 
        }

        @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

        }
    }

    @Override
    public void onClick(DialogInterface dialog, int which) {
        if(which == DialogInterface.BUTTON_NEUTRAL){
            editTextShowLocation.setText("Sorry, location is not determined. To fix this please enable location providers");
        }else if (which == DialogInterface.BUTTON_POSITIVE) {
            startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
        }
    }

How to acheive this.

Answer 1

try this

public class TestActivity extends Activity implements Runnable {
 private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters
    private static final long MINIMUM_TIME_BETWEEN_UPDATES = 30000;

    protected LocationManager locationManager;
    static double n=0;
    Long s1,r1;
    double plat,plon,clat,clon,dis;
    MyCount counter;
    Thread t1;
    EditText e1;
    boolean bool=true;

Button b1,b2,b3,b4,b5;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    b1=(Button)findViewById(R.id.button1);<--- current position
    b2=(Button)findViewById(R.id.button2);<---- start moving.. calculates distance on clicking this
    b3=(Button)findViewById(R.id.button3);<--- pause
    b4=(Button)findViewById(R.id.button4);<-- resume
    b5=(Button)findViewById(R.id.button5);<-- get distance
    e1=(EditText)findViewById(R.id.editText1);
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locationManager.requestLocationUpdates(
            LocationManager.GPS_PROVIDER, 
            MINIMUM_TIME_BETWEEN_UPDATES, 
            MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
            new MyLocationListener()
    );
    b1.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            showCurrentLocation();
        }
});     

}
protected void showCurrentLocation() {

    Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

    if (location != null) {
        String message = String.format(
                "Current Location 
 Longitude: %1$s 
 Latitude: %2$s",
                location.getLongitude(), location.getLatitude()
        );
        clat=location.getLatitude();
        clon=location.getLongitude();
        Toast.makeText(TestActivity.this, message,
                Toast.LENGTH_LONG).show();
    }
    else{
        Toast.makeText(TestActivity.this, "null location",
                Toast.LENGTH_LONG).show();
    }

}
public void start (View v){

    switch(v.getId()){

    case R.id.button2:
        t1=new Thread();
        t1.start();
        counter= new MyCount(30000,1000);
     counter.start();
     break;
    case R.id.button3:
        counter.cancel();
        bool=false;
        break;
    case R.id.button4:
        counter= new MyCount(s1,1000);
     counter.start();
     bool=true;
     break;
    case R.id.button5:

        double time=n*30+r1;
        Toast.makeText(TestActivity.this,"distance in metres:"+String.valueOf(dis)+"Velocity in m/sec :"+String.valueOf(dis/time)+"Time :"+String.valueOf(time),Toast.LENGTH_LONG).show();

    }


}


private class MyLocationListener implements LocationListener {

    public void onLocationChanged(Location location) {
        String message = String.format(
                "New Location 
 Longitude: %1$s 
 Latitude: %2$s",
                location.getLongitude(), location.getLatitude()
        );

        Toast.makeText(TestActivity.this, message, Toast.LENGTH_LONG).show();
    }

    public void onStatusChanged(String s, int i, Bundle b) {
        Toast.makeText(TestActivity.this, "Provider status changed",
                Toast.LENGTH_LONG).show();
    }

    public void onProviderDisabled(String s) {
        Toast.makeText(TestActivity.this,
                "Provider disabled by the user. GPS turned off",
                Toast.LENGTH_LONG).show();
    }

    public void onProviderEnabled(String s) {
        Toast.makeText(TestActivity.this,
                "Provider enabled by the user. GPS turned on",
                Toast.LENGTH_LONG).show();
    }

}
public class MyCount extends CountDownTimer{
    public MyCount(long millisInFuture, long countDownInterval) {
    super(millisInFuture, countDownInterval);
    }
    @Override
    public void onFinish() {
        counter= new MyCount(30000,1000);
     counter.start();
     n=n+1;
    }
    @Override
    public void onTick(long millisUntilFinished) {
        s1=millisUntilFinished;
        r1=(30000-s1)/1000;
        e1.setText(String.valueOf(r1));


    }
    }
@Override
public void run() {
    while(bool){
  clat=location.getLatitude();
        clon=location.getLongitude();
        if(clat!=plat || clon!=plon){
            dis+=getDistance(plat,plon,clat,clon);
            plat=clat;
            plon=clon;

        }

    }

}

function for calculating distance...

public double getDistance(double lat1, double lon1, double lat2, double lon2) {
    double latA = Math.toRadians(lat1);
    double lonA = Math.toRadians(lon1);
    double latB = Math.toRadians(lat2);
    double lonB = Math.toRadians(lon2);
    double cosAng = (Math.cos(latA) * Math.cos(latB) * Math.cos(lonB-lonA)) +
                    (Math.sin(latA) * Math.sin(latB));
    double ang = Math.acos(cosAng);
    double dist = ang *6371;
    return dist;
}

}