Develop Reference

I need to sort the latitude and longitude. which is nearer to my current location

This is how i calculate the Distance between my list.
my code is below
public void calc(){
for(int i = 0; i < mSearchResultModelsToGetAppointments.size(); i++){
Location newLocation = new Location("");
newLocation.setLatitude(gpsTracker.getLatitude());
newLocation.setLongitude(gpsTracker.getLongitude());
if(String.valueOf(gpsTracker.getLatitude()).equalsIgnoreCase("0.0") || String.valueOf(gpsTracker.getLongitude()).equalsIgnoreCase("0.0")) {
} else{
Location oldLocation = new Location("");
oldLocation.setLatitude(mSearchResultModelUnderProcess.getLatitude());
oldLocation.setLongitude(mSearchResultModelUnderProcess.getLongitude());
float distanceInMeters = newLocation.distanceTo(oldLocation)/1000;
if(distanceInMeters < 2820){
getAdapter().notifyDataSetChanged();
getAdapter().removeItem(i);
getAdapter().notifyDataSetChanged();
}
}
}
}
This is how i display the location now.

If you do not want use any external library, I would suggest following way.
Create your own custom Location Class with attributes lat and lng, and additionally attribute called distance which measures from your current location till the point. here you can find how to find distance between 2 points
This class should implement Comparable interface and override its compare function. Inside this function, you can create your own sorting logic based on distance
here you can find how to use comparable interface, Let me know if you have still problem
Happy coding

How to Compaire Geolocations In Android?

How to Compare saved (in database ) Geo Location(Longitude and Latitude) with currently getting one using GPS.i tried following link but it doesn't work for me ,getting wrong output.Please help me i am new in Android.
How to use coarse location to compare with saved location in database
my requirement is exact as explained in ANS.
i did
float radius = 150; // distance in meter
double latitude_new= gps.getLatitude();
double longitude_new = gps.getLongitude();
Location location1= new Location("gpslocation");
location1.setLatitude(21.xxxxxxx);
location1.setLongitude(78.xxxxxxx);
Location location2= new Location("gpslocation");
location2.setLatitude(latitude_new);
location2.setLongitude(latitude_new);
float distance = location2.distanceTo(location1);
distance=Math.abs(distance);
//comparing two distance and radius
if (distance <= radius){
Toast.makeText(MyActivity.this, "At home", Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(MyActivity.this,"Not in Home",Toast.LENGTH_SHORT).show();
}
problem is i m getting only "Not in Home" at SAME location which i have hard-coded and even on other locations(other than hard-coded).
thanks

You have provide latitude for the longitude also , edit your code as follows and try ,
location2.setLongitude(longitude_new);

Android: How can I get the traveled distance while I'm running?

I'm wrinting a application and I have to show the distance covered while I'm running.
I use the function "public void onLocationChanged" of the LocationListener. When the user tap a botton and start running I want to show the distance he covered updated to the point in which he is located.
I've written this code:
public void onLocationChanged(Location location) {
if(location != null) {
if(location.hasSpeed()){
if(latitude1 == 0 && longitude1 == 0){
latitude1 = (location.getLatitude()*Math.PI)/180;
longitude1 = (location.getLongitude()*Math.PI)/180;
} else{
latitude2 = (location.getLatitude()*Math.PI)/180;
longitude2 = (location.getLongitude()*Math.PI)/180;
distance = (6372.795477598)*Math.acos(Math.sin(latitude1)
*Math.sin(latitude2)+Math.cos(latitude1)
*Math.cos(latitude2)*Math.cos(longitude1-longitude2));
sumDistance += distance;
latitude1 = latitude2;
longitude1 = longitude2;
}
tv.setText("Distance covered=" + sumDistance + " m");
}
}
}
Is it accurated?

Just a Suggestion:
Store the Latitude and Longitude of the start location and the end location when the user clicks the appropriate button.
and then you could use distanceBetween or distanceTo to get the distance between those two geoPoints.
P.S: This may not work if the user will start and end his run at the same point ;)
Addition:
Check this tutorial:

Recently google has improved its location based API's. They have fused the sensors with the location based api's to share examples of how location can be made more accurate (about 4 times more effective) and consume much lesser power (10 times lesser).
Some interesting links for you to go through will be this and video google io.
SO link for how to use the API's here

Android: Issue in calculating distance using Location manager

Currently I am working on an application, where I want to calculate distance a vehicle travels. My requirement is while driving car, my Android device should calculate total distance I traveled and send this information to server. In order to do this, I used Android's location manager api, set criteria and used getBestProvider. This way we can either use GPS or Network to get latitude and longitude. The following is the code snippet of this:
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setPowerRequirement(Criteria.POWER_HIGH);
provider = locationManager.getBestProvider(criteria, false);
locationManager.requestLocationUpdates(provider,30000,5, this);
onLocationChanged() call back method provide latitude and longitude every time. We always store previous coordinates and when we get new coordinates we find the distance between the two using distanceBetween() api. The following is the code snippet of this:
public void onLocationChanged(Location location) {
findLatLongDistance(location);
}
private void findLatLongDistance(Location location) {
// TODO Auto-generated method stub
try{
Date date = new Date();
TimeStamp2 = sdf.format(date);
getSavedLatLong();//get lat and long from preference
Location locationB = new Location("point B");
locationB.setLatitude(location.getLatitude());
locationB.setLongitude(location.getLongitude());
Location locationA = new Location("point A");
locationA.setLatitude(prelat_val); //lat from pref locationA.setLongitude(prelong_val); //long from pref
if(prelat_val>0.0 && prelong_val>0.0){
Toast.makeText(LocationService.this,"Location Odometer Sum "+odometer_sum, Toast.LENGTH_LONG).show();
float distance2 = getDistance(prelat_val,prelong_val,location.getLatitude(),location.getLongitude());
odometer_sum = odometer_sum + (distance2/1000);
Toast.makeText(LocationService.this,"Lat "+prelat_val+"Long "+prelong_val+"Sum "+odometer_sum, Toast.LENGTH_LONG).show();
}
saveData(lat,lng,odometer_sum);
}catch(Exception e){
e.printStackTrace();
}
}
public float getDistance(double d, double e, double f, double g) {
float [] dist = new float[2];
Location.distanceBetween(d,e,f, g, dist);
return dist[0] ;
}
This is the list of issue that we face here:
The location it provide is not accurate. There is a difference of about 300-400 metres while we testing this app in 5 km distance
When the mobile is in same location for long time, it always provide different latitude and longitude. If you check above code snippet, in requestLocationUpdates(), we are setting 30 seconds time interval and 5m distance. Here what we thought is, if my mobile device move 5m distance AND if it cross 30 seconds interval, it will provide new latitude and longitude. But what really happens is, it provide coordinates every 30 seconds irrespective of device movement. I am not sure how to fix this issue.
While device is moving, how to get accurate value. Do I need to do some more things in the code?
I really spend so many hours trying various options. But I feel I am missing something here. Please help me on this. Thanks in advance..
Thanks,

Your minTime value in requestLocationUpdates() is 30seconds. Thats too long for an app that tries to calculate accurate distances. I have used locationManager.requestLocationUpdates(provider, 0, 5, locationListener);
in my code for long and I get accurate updates. Though this drains the battery very fast. So you would have to try different values to strike a balance between accuracy and battery life and see what suits your app

Getting Location from coordinates

I have given coordinates for latitude and longitude, and I want make a location object with those.There isn't a constructor that takes to doubles to make a location, so I tried like this:
Location l = null;
l.setLatitude(lat);
l.setLongitude(lon);
but it crashes. Any different idea?

Just create a new Location with new Location("reverseGeocoded");
like this
GeoPoint newCurrent = new GeoPoint(59529200, 18071400);
Location current = new Location("reverseGeocoded");
current.setLatitude(newCurrent.getLatitudeE6() / 1e6);
current.setLongitude(newCurrent.getLongitudeE6() / 1e6);
current.setAccuracy(3333);
current.setBearing(333);

This crashes because you cannot call methods on an non existent object.
I presume you are talking about android.location.Location?
This is usually returned by the various positioning services of Android.
What do you want to do with it?
Do you want to reverse geocode it? As in find an address for that geo coordinate?
Or do you want to use it as a "fake" position and feed it to other applications?
There are BTW two constructors. One takes the name of a positioning service and the other is a copy constructor and takes an existing Location.
So you could create a Location like this:
Location l = new Location("network");
But I do not think that this will result in something you want to have.
Here is a link to the documentation:
https://developer.android.com/reference/android/location/Location.html#Location%28java.lang.String%29

Location l = new Location("any string");
l.setLatitude(lat);
l.setLongitude(lon);

Try this:
public double lat;
public double lon;
public void onLocationChanged(Location loc)
{
lat=loc.getLatitude();
lon=loc.getLongitude();
Toast.makeText(getBaseContext(),"Latitude:" + lat +Longitude"+lon,Toast.LENGTH_LONG).show();
}