CODEWITHSUNDEEP
javaandroidgoogle-mapslocation
Omid Aghakhani
Omid Aghakhani

Reputation: 100

Get distance between two location in java android

I know that I can get distance with google api and it is very good

But is it slow sometimes and not possible for my app

Is there any way to get distance between two location?

Upvotes: 0

Views: 1377

Answers (4)

Omid Aghakhani
Omid Aghakhani

Reputation: 100

After many search and faq,Finally I understood that google's api is best and first way to get distance two location

Upvotes: 0

Ramesh sambu
Ramesh sambu

Reputation: 3539

Google Distance matrix API need to use for the correct distance between places.

Upvotes: 0

Bradley Wilson
Bradley Wilson

Reputation: 1197

You could easily get the lastKnownLocation, add the co-ordinates to an ArrayList and then measure the distance between the points in that list as shown below:

Prerequisites:

Add permissions to manifest: 

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

Import Gradle Dependencies:

  compile 'com.google.android.gms:play-services-location:10.2.1'

Add this class to your project:

Github: android-maps-utils : SphericalUtil.java

Implement LocationListener in your Activity:

public class myClass extends Activity implements LocationListener {

Define your global Variables:

private LocationManager locationManager;
private String provider;
private ArrayList<LatLng> coordList = new ArrayList<String>();

Get Initial Location (in onCreate() or onClick()):

locationManager = (LocationManager) getActivity().getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
if (coordList != null && !coordList.isEmpty()) {
    coordList.get(0);
} else {
    coordList.add(0, new LatLng(location.getLatitude(), location.getLongitude()));
}

if (location != null) {
   onLocationChanged(location);
}

getLocationUpdates();

create a getLocationUpdates() method: 

 private void getLocationUpdates() {
        if (locationManager != null) {
            checkPermission();
            locationManager.requestLocationUpdates(provider, ONE_SECOND, ONE_METER, this);
        }
    }

Request location updates from your locationManager (make sure you requestPermission for Android 6.0 and up) 

@Override
    public void onResume() {
        super.onResume();
        getLocationUpdates();
    }

Use the SphericalUtil class to compute the distance within the ArrayList inside the onLocationChange function. 

@Override
    public void onLocationChanged(Location location) {
        double distance = SphericalUtil.computeLength(coordList);
        distance = round(distance, 2) / 1000;
        distanceOutput.setText(distance + "km");
    }

Add the round functionality:

public static double round(double value, int places) {
        if (places < 0) throw new IllegalArgumentException();
        BigDecimal bd = new BigDecimal(value);
        bd = bd.setScale(places, RoundingMode.FLOOR);
        return bd.doubleValue();
}

This will get the distance between start and end points in km and round it down to two decimal places, feel free to convert them into any other unit of distance depending on your use-case.

Upvotes: 1

Damien
Damien

Reputation: 141

You should use Location.distanceBetween() or Location.distanceTo()

Upvotes: 1

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