calculate actual distance travelled by mobile [closed]

Answer 1

Android :: how to calculate distance while walking in android?

There are different ways to do this:

1.GPS: Keep adding GPS distance between 2 points every X seconds (say 10 sec). Check Android Location.distanceTo or distanceBetween. Check My Tracks app, it is open source. GPS is not available indoors and would have error if user is changing direction very frequently (read every 1-2 second) 2.Accelerometer: Look for code/library for step detection using accelerometer. Distance comes from double integration of acceleration, errors can add up very quickly here. 3.Step detector: Built-in in Nexus 5. Google must have taken care of accelerometer errors to extent possible. This is hardware-based computation, consumes less battery but not available in most of handsets as of date.

The 2nd option seem very similar to what you suggested and I do think its the best way to achieve it since iOS and Android defer in code and in functionality therefor the best method to achieve it is saving currentLocation and previousLocation in a while loop that will .sleep() and just sum the entire loop as the distance traveled. the bigger question is this supposedly app is a distance summerizing app? does it just a small function inside of it? how do you decide when to stop calculating the distance?

Answer 2

4 years ago, I just made an app called Landsurvayor that calculates the actual distance of two geo-graphical points drawn on Google Map. I don't know that might help you or not but there is a formula called Haversine formula that calculates the actual distance between two geo-graphical points. You might give it a try and see whether it is useful for you or not. Below is the sample code of Haversine formula:

public double CalculationByDistance(double initialLat, double initialLong,
                            double finalLat, double finalLong){
int R = 6371; // km
double dLat = toRadians(finalLat-initialLat);
double dLon = toRadians(finalLong-initialLong);
lat1 = toRadians(lat1);
lat2 = toRadians(lat2);

double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
        Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2); 
double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
return R * c;
}

public double toRadians(deg) {
  return deg * (Math.PI/180)
}

More about Haversine formula: https://en.wikipedia.org/wiki/Haversine_formula

There is another simple Android SDK built-in approach to calculate distance between two lat, lng:

Location locationA = new Location("point A");     
locationA.setLatitude(latA); 
locationA.setLongitude(lngA);
Location locationB = new Location("point B");
locationB.setLatitude(latB); 
LocationB.setLongitude(lngB);
distance = locationA.distanceTo(locationB) ;

I hope it might help you.

Answer 3

You can achieve more accuracy with a combination of the following strategies.

1. As mentioned in other Answers, you can store the position of the mobile every X seconds(say 10 seconds) using GPS and measure the consecutive time between the points.

2. Also when the user makes quick turns, make sure to read that by using Magnetic Sensor values too, so in such event, decrease the "timing between position storing" to say 1-2 seconds(Will be needed for accuracy)

3. As a final step, use Map data(such as Google Maps etc.) to make sure you are being tracked properly(if on road).

And then sum up all the values to get the accurate distance.

P.S. I gave information about the strategies alone since I'm not sure about its implementation in Android(or iOS).

Hope this helps :)

Answer 4

If accuracy is critical, you can use data from accelerometer and gyroscope. You can find very simple formula for solving simple cinematic task so you get acc in global axis. Than you just have to use integral twice (first to get velocity, than to get position). Just to show another perspective.

Answer 5

Log points every x seconds (maybe 2-3?) and use distance formula below for every point logged.

Distance = sqrt((x2−x1)^2+(y2−y1)^2)

Sum them all up and you get distance

Answer 6

Use GPS to get lat lon of both places and after getting both pass it below method.Its will return distance in km

public static double getDistanceFromLatLonInKm(double lat1, double lon1,
        double lat2, double lon2) {



    double R = 6371; // Radius of the earth in km
    double dLat = deg2rad(lat2 - lat1); // deg2rad below
    double dLon = deg2rad(lon2 - lon1);
    double a = Math.sin(dLat / 2) * Math.sin(dLat / 2)
            + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2))
            * Math.sin(dLon / 2) * Math.sin(dLon / 2);
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
    double d = R * c; // Distance in km


    return d;

}

public static double deg2rad(double deg) {
    return deg * (Math.PI / 180);
}

}