calculate distance from source to destination in android

//import this
import com.google.maps.android.SphericalUtil;

public class Detailed extends AppCompatActivity {

//define object for storing latitude and longitude coordinates
LatLng YourLocationData;
LatLng DestinationData;
Double Distance;

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
      
      //button casting
       Button btn=findViewById(R.id.button2);
      
      //setting cooridnates 
      YourLocationData = new LatLng(15.40757526659319, 73.99194849921113);
      DestinationData = new LatLng(15.366058435624439, 73.94238788088278);
      
      
      //OnClick listener for functionality of button
      btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {


              //checking permission for location
        if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        
            return;
        }
              
              distance = SphericalUtil.computeDistanceBetween(YourLocationData,DestinationData);
                            Toast.makeText(MainActivity.this, "Distance between Your Location and Destination is \n " + String.format("%.2f", distance / 1000) + "km", Toast.LENGTH_SHORT).show();
              
      });
        
      }
                             
    }