Android Google Map how to check if the gps location is inside the circle

Question

I\'m trying to detect if a user is in the radius of a Marker , using the users gps location. I have the marker\'s coordinates, but I don\'t know how to calculate whether the

Answer 1

The accepted solution of Daniel Nugent isn't so good anymore because setOnMyLocationChangeListener is deprecated now.

Here is current way how to do it in fragment - change getActivity() with this for Activity:

private boolean mLocationPermissionGranted;

// The geographical location where the device is currently located. That is, the last-known
// location retrieved by the Fused Location Provider.
private Location mLastKnownLocation;
private long UPDATE_INTERVAL = 10 * 1000;  /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
private FusedLocationProviderClient mFusedLocationProviderClient;

private void addLocationChangeListener(){
        // Construct a FusedLocationProviderClient.
        mFusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(getActivity());

        // Create the location request to start receiving updates
        LocationRequest mLocationRequest = new LocationRequest();
        mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        mLocationRequest.setInterval(UPDATE_INTERVAL);
        mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
        //mLocationRequest.setMaxWaitTime(0);
        //mLocationRequest.setSmallestDisplacement(0);

        // Create LocationSettingsRequest object using location request
        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
        builder.addLocationRequest(mLocationRequest);
        LocationSettingsRequest locationSettingsRequest = builder.build();

        // Check whether location settings are satisfied
        // https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient
        SettingsClient settingsClient = LocationServices.getSettingsClient(getActivity());
        settingsClient.checkLocationSettings(locationSettingsRequest);


        // new Google API SDK v11 uses getFusedLocationProviderClient(this)
        if (mLocationPermissionGranted) {
            mFusedLocationProviderClient.requestLocationUpdates(mLocationRequest,
                    new LocationCallback() {
                        @Override
                        public void onLocationResult(LocationResult locationResult) {
                            // do work here
                            Location location = locationResult.getLastLocation();
                        }
                    },
                    Looper.myLooper());
        } else {
            getLocationPermission();
        }
    }