Clever Geek Handbook

Using gps allows you to get the distance that a person has traveled

Guys, I can get the current location longitude and Latitude using the code below. I have two buttonsStart walking and Stop Walking.

Onclick of Start Walking

it will get the current location (longitude and latitude), the person will start moving from position A (source) and walk for some time and return to A (now it becomes the destination), after which he press the stop walking button.

Now I need to show the user this data:

1. The resistance that he walked in KM.

2. The time it took for a few 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 + "\n" + latitude + "\n" + altitiude + "\n" + accuracy + "\n" + 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 achieve this.

+2


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3 answers


try it

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 \n Longitude: %1$s \n Latitude: %2$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 \n Longitude: %1$s \n Latitude: %2$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;

        }

    }

}

to calculate 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;
}

}

+7


source


First of all. This is more a question about a problem, and then you will get an answer. The people on this board won't work for you.

Now to achieve what you want.



You need to use the service to track user and location. An easy way would be to enable the mytracks service, which is available as an add-on to your application, or use the code from mytracks to create your own tracking service. http://code.google.com/p/mytracks/

You can check: http://code.google.com/p/mytracks/w/list

+6


source


You can calculate the distance between two geographic locations using distanceTo () function
Location destination =new Location("gps");


destination.setLatitude(lat);


destination.setLongitude(lng);


float dist=user_location.distanceTo(destination);

+1


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