Determining the speed of a vehicle using GPS in android
android, android-location, gps, location
Solution
GPS works fine in a vehicle. The `NETWORK_PROVIDER` setting might not be accurate enough to get a reliable speed, and the locations from the `NETWORK_PROVIDER` may not even contain a speed. You can check that with `location.hasSpeed()` (`location.getSpeed()` will always return 0).
If you find that `location.getSpeed()` isn't accurate enough, or it is unstable (i.e. fluctuates drastically) then you can calculate speed yourself by taking the average distance between a few GPS locations and divide by the time elapsed.
Problem
I would like to know how to get the speed of a vehicle using your phone while seated in the vehicle using gps. I have read that the accelerometer is not very accurate. Another thing is; will GPS be accessible while seated in a vehicle. Won't it have the same effect as while you are in a building? Here is some code I have tried but I have used the NETWORK PROVIDER instead.I will appreciate the help. Thanks... ``` package com.example.speedtest; import android.app.Activity; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.widget.Toast; public class MainActivity extends Activity { LocationManager locManager; LocationListener li; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); locManager=(LocationManager)getSystemService(Context.LOCATION_SERVICE); li=new speed(); locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, li); } class speed implements LocationListener{ @Override public void onLocationChanged(Location loc) { Float thespeed=loc.getSpeed(); Toast.makeText(MainActivity.this,String.valueOf(thespeed), Toast.LENGTH_LONG).show(); } @Override public void onProviderDisabled(String arg0) {} @Override public void onProviderEnabled(String arg0) {} @Override public void onStatusChanged(String arg0, int arg1, Bundle arg2) {} } } ```