How to avoid the battery drain while implementing the GPS?

In my app I'm using a GPS listener. I need to turn off the GPS and activate it later. Currently I'm using

locationManager.removeUpdates(locationListener);

to turn off the gps. That will turn the GPS off. But later I'm not able to开发者_如何学C turn it on? Is there any other methods to turn off the gps?

For activating the GPS I'm using

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, updatesInterval, 0, locationListener);

You can make a service which implement location Listener so when ever you want to start location listener then you can start service and put

ocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, updatesInterval, 0, locationListener);

line in onCreate() method

and when you want to close location update the stop service and put line

locationManager.removeUpdates(locationListener);

to onDistroy() method

I want the gps to return the most accurate value. So I set the minValue and minDistance value of the requestLocationUpdates function to 0.

Then to solve the problem with battery drain I'll start and stop the gps (which is a service) when the app comes to foreground and when the app enters background.

To start the GPS i used

locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);

in the onCreate of the service.

To end the GPS i used

locationManager.removeUpdates(locationListener);

in the onDestroy of the service.

You have to do the starting and stopping of the gps in a service, so that you can start and stop the same instances of the location listener otherwise this thing will go drastically wrong