Is there a way to calculate the distance in kilometers between two sets of longitude and latitude in an Android application?

Question

Is there a way to calculate the distance in kilometers between two sets of longitude and latitude in an Android application?

Explanation: This question may sound repetitive, but I have encountered some confusion while working on a live application. The JSON data contains longitude and latitude values which I need to compare with the current coordinates. Despite attempting various methods, I haven't achieved the desired outcome.

I aim to determine whether the user's current location (longitude and latitude) is within a five-kilometer radius of the coordinates provided in the JSON. If the user is outside this range (more than five kilometers), a message should be displayed indicating that the user is out of range.

Here is the code snippet for obtaining longitude and latitude:

public class HomeFragment extends Fragment implements ConnectionCallbacks, OnConnectionFailedListener,LocationListener{
    // Code here

JSON RESPONSE: https://i.stack.imgur.com/weRjF.png

In the above code block, particularly in the `getUcgCallApi()` method, I attempted to compare old and current longitude and latitude values without success.

Your assistance in resolving this issue would be greatly appreciated.

Thank you in advance.

android json

Answer 1

Answer №1

To find the distance between two sets of latitude and longitude coordinates, you can use the following code snippet:

float[] results = new float[1];
Location.distanceBetween(startLatitude, startLongitude, endLatitude, endLongitude, results);

The computed distance is then accessible at `results[0]`. If `results` array has a length greater than 1, the initial bearing value will be stored in `results[1]`. Similarly, if the length is greater than 2, the final bearing value will be stored in `results[2]`.

Answer 2

To find the distance between two sets of latitude and longitude coordinates, you can use the following code snippet:

float[] results = new float[1];
Location.distanceBetween(startLatitude, startLongitude, endLatitude, endLongitude, results);

The computed distance is then accessible at `results[0]`. If `results` array has a length greater than 1, the initial bearing value will be stored in `results[1]`. Similarly, if the length is greater than 2, the final bearing value will be stored in `results[2]`.

Answer 3

Answer №2

don't miss out on this helpful resource:

Calculate distance in meters when longitude and latitude are known in Java

public static float calculateDistance(float lat1, float lng1, float lat2, float lng2) {
    double earthRadius = 6371000; //meters
    double dLat = Math.toRadians(lat2-lat1);
    double dLng = Math.toRadians(lng2-lng1);
    double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
               Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) *
               Math.sin(dLng/2) * Math.sin(dLng/2);
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
    float dist = (float) (earthRadius * c);

    return dist;
    }

Use the method like this:

float meter= calculateDistance(LOCATION_LATITUDE1,LOCATION_LONGITUDE2,LOCATION_LATITUDE2,LOCATION_LONGITUDE2);


final float kilometer=meter/1000;

You can easily convert the distance from meters to kilometers.

Answer 4

don't miss out on this helpful resource:

Calculate distance in meters when longitude and latitude are known in Java

public static float calculateDistance(float lat1, float lng1, float lat2, float lng2) {
    double earthRadius = 6371000; //meters
    double dLat = Math.toRadians(lat2-lat1);
    double dLng = Math.toRadians(lng2-lng1);
    double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
               Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) *
               Math.sin(dLng/2) * Math.sin(dLng/2);
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
    float dist = (float) (earthRadius * c);

    return dist;
    }

Use the method like this:

float meter= calculateDistance(LOCATION_LATITUDE1,LOCATION_LONGITUDE2,LOCATION_LATITUDE2,LOCATION_LONGITUDE2);


final float kilometer=meter/1000;

You can easily convert the distance from meters to kilometers.

Is there a way to calculate the distance in kilometers between two sets of longitude and latitude in an Android application?

Answer №1

Answer №2

Similar questions

Troubles encountered while parsing nested JSON objects with a streaming parser

Cricket score update features on the client side

Fill a dropdown menu with options from a JSON object, arranging them in ascending order

Converting Basic JSON Data into an SQL SELECT Query

What is the best way to send a JSON object in Vue.js?

What could be the reason for Express not setting the JSON content type?

Dynamic JSON property addition in C# at runtime

Jquery Ajax failing to retrieve a response

Having trouble with the JSON Parse function in my code, but it seems to be functioning correctly

jsoup - locate element and delete it along with the element preceding it

Retrieve the value of an AngularJS expression and display it in a window alert using AngularJS

What is the reason dynamic colors cannot be applied in XML?

Exploring and organizing JSON data with PostgreSQL

Spring JSON Neo4j is a powerful combination for building robust

SCRIPT438: The operation failed because the object does not have the ability to use the 'forEach' property or method

Ways to insert user data into a hidden input field

Seeking assistance with dilemmas related to jQuery (specifically kendo), .NET Web Service (asmx), and Json

I am having trouble authorizing a GET request with fetch

"Upon parsing the JSON data, the decoder yielded a null

Query in JSONPath to retrieve elements in an array depending on a specified key's value