Android gets to its current location via GPS

Positioning GPS positioning and base station positioning: GPS positioning is based on satellite positioning, the need to open the head, positioning error in 2-10 meters, the base station network positioning is based on distance from the mobile phone positioning, the error is large, as long as the mobile phone has a signal can be located; Getting GPS information is divided into the following steps:

1) access to location-related services is obtained through the context

Manager = (Locationmanager) context.getsystemservice (Context.location_service);

2) Select one of the best positioning methods in the current state GPS positioning or base station positioning

/** *  * @param manager Location Management Service * @return Best location provider    //GPS//wifi//*/private String Getprovider (Locationmanager man Ager) {//a set of query conditions criteria = new criteria (); criteria.setaccuracy (criteria.accuracy_fine);//get precise position, Criteria.setaltituderequired (false);//not sensitive to elevation criteria.setpowerrequirement (criteria.power_medium);// Power consumption medium criteria.setspeedrequired (TRUE);//Speed Change sensitive criteria.setcostallowed (true);//Generate overhead  communication cost//Return the best location provider   True indicates that only the currently opened location device return  Manager.getbestprovider (criteria, true) is returned;}

3) Location of the listener

4) Register Location Listener

The code is as follows:

/** * Ensure that there is only one instance of this Class 1 privatization construction method (we cannot instantiate an object of this class externally, only the object of a person class can be instantiated inside the Class) * 2 provides a static method for returning instances * * */public class Gpsinfoprovider {Locationmanager manager;//single private static Gpsinfoprovider mgpsinfoprovider;private  Static Context context;//single case private static Myloactionlistener listener;  1. Privatization construction Method Private Gpsinfoprovider () {}; 2. Provides a static method to return an instance of him to ensure that the code must be executed to complete the synchronized gpsinfoproviderpublic static synchronized Gpsinfoprovider Getinstanc E (Context context) {if (mgpsinfoprovider==null) {mgpsinfoprovider = new Gpsinfoprovider (); Gpsinfoprovider.context = context;} return mgpsinfoprovider;} Get GPS Information public String getLocation () {//Get location-related service services are obtained through the context of manager = (Locationmanager) context.getsystemservice (context.location_service);//Get all the positioning methods//manager.getallproviders ();  GPS//wifi////Select one of the best positioning methods in the current state String Provider = Getprovider (manager);//Register the location of the listener/** *provider positioning mode with what device to locate the base station network GPS AGPS * Time GPS how long time to regain the position minimum of 1 minutes * position the shortest displacement position change how much regainTake the position *listener position changes when the corresponding callback method */manager.requestlocationupdates (provider,60000, Getlistener ()); Sharedpreferences sp = context.getsharedpreferences ("config", context.mode_private); String location = sp.getstring (' Location ', ' ""); return location;} Stop GPS monitoring public void Stopgpslistener () {///parameter is Locationlistenermanager.removeupdates (Getlistener ());} Returns listener instance private synchronized Myloactionlistener Getlistener () {if (listener==null) {listener = new Myloactionlistener ();} return listener;} Private class Myloactionlistener Implements locationlistener{/** * method called when the phone location changes */public void onlocationchanged ( Location location) {String latitude = "latitude" + location.getlatitude (); Weidu String longtitude = "Longtitude" + location.getlongitude (); Jingdusharedpreferences sp = context.getsharedpreferences ("config", context.mode_private); Editor editor = Sp.edit (); Editor.putstring ("Location", latitude+ "-" + longtitude); Editor.commit (); The last acquired location information is stored inside the sharedpreference}/** * Status of a certain device occursChange when call available---unavailable---available GPS is available */public void onstatuschanged (String provider, int status, Bun Dle extras) {}/** * a device is turned on the GPS is turned on */public void onproviderenabled (String provider) {}/** a device disabled by GPS disabled * */publi c void onproviderdisabled (String provider) {}}/** * * @param manager Location Management Service * @return Best location Provider//GPS//wifi//*/priv Ate String Getprovider (Locationmanager Manager) {//a set of query criteria criteria = new criteria (); Criteria.setaccuracy ( Criteria.accuracy_fine); Get precise position, criteria.setaltituderequired (false),//not sensitive to altitude criteria.setpowerrequirement (criteria.power_medium);// Power consumption medium criteria.setspeedrequired (TRUE);//Speed Change sensitive criteria.setcostallowed (true);//Generate overhead communication cost//return best location Provider true Indicates that only the currently opened location device return Manager.getbestprovider (criteria, true) is returned;}}