Android gets GPS longitude and latitude

The project needs to complete a small demo without talking nonsense. The Code is as follows:

Public class gpsactivity extends activity {private edittext; private textview TV _gps; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. GPS); edittext = (edittext) findviewbyid (R. id. edittext); TV _gps = (textview) findviewbyid (R. id. textview1); registergps ();} public locationmanager lm; Private Static final string tag = "GPS Serv ICES "; private void registergps () {LM = (locationmanager) getsystemservice (context. location_service); // determine if GPS is enabled normally if (! Lm. isproviderenabled (locationmanager. gps_provider) {toast. maketext (this, "enable GPS navigation... ", toast. length_short ). show (); // return to enable the GPS navigation settings interface intent = new intent (settings. action_location_source_settings); startactivityforresult (intent, 0); return;} // set the query condition string bestprovider = Lm when obtaining geographical location information. getbestprovider (getcriteria (), true); // obtain location information // if no query requirement is set, the parameter of the getlastknownlocation method is locationmanager. gps_pro Vider location = LM. getlastknownlocation (bestprovider); // location = LM. getlastknownlocation (locationmanager. network_provider); updateview (location); // listener lm. addgpsstatuslistener (listener); // bind the listener. There are four parameters // parameter 1, device: gps_provider and network_provider. // parameter 2. The Location Information Update period, unit: millisecond // parameter 3, minimum distance of location change: When the Location Distance changes beyond this value, the location information will be updated // parameter 4, listener // remarks: parameters 2 and 3, if the value of parameter 3 is not 0, parameter 3 prevails. If the value of parameter 3 is 0, the time is used for timed update. If the value of parameter 3 is 0, the system updates the value at any time. // The value is updated once per second, or minimum displacement Update once more than 1 meter; // Note: The update accuracy is very low here. We recommend that you start a thread in the service and sleep (10000) in the run; then execute handler. sendmessage (), update location lm. requestlocationupdates (locationmanager. gps_provider, 1000, 1, locationlistener); // lm. requestlocationupdates (locationmanager. network_provider, 1000, 1, locationlistener);} // location listening private locationlistener = new locationlistener () {/*** triggered when location information changes */Public void onlocationchanged (Lo Cation location) {updateview (location); log. I (TAG, "Time:" + location. gettime (); log. I (TAG, "longitude:" + location. getlongpolling (); log. I (TAG, "latitude:" + location. getlatitude (); log. I (TAG, "altitude:" + location. getaltitude ();}/*** triggered when the GPS status changes */Public void onstatuschanged (string provider, int status, bundle extras) {Switch (Status) {// case locationprovider when the GPS status is visible. available: log. I (TAG, "current GPS status is visible"); break; // Case locationprovider when the GPS status is outside the service area. out_of_service: log. I (TAG, "the current GPS status is out of service"); break; // case locationprovider when the GPS status is suspended. temporarily_unavailable: log. I (TAG, "the current GPS status is suspended"); break ;}/ *** trigger when GPS is enabled */Public void onproviderenabled (string provider) {location = LM. getlastknownlocation (provider); updateview (location);}/*** triggered when GPS is disabled */Public void onproviderdisabled (string provider) {Updateview (null) ;}}; // status listening gpsstatus. listener listener = new gpsstatus. listener () {public void ongpsstatuschanged (INT event) {Switch (event) {// locate case gpsstatus for the first time. gps_event_first_fix: log. I (TAG, "first positioning"); break; // satellite status change case gpsstatus. gps_event_satellite_status: log. I (TAG, ""); // obtain the current gpsstatus = LM. getgpsstatus (null); // gets the default maximum number of satellite stars. Int maxsatellites = gpsstatus. getmax Satellites (); // create an iterator to save all satellite iterator <gpssatellite> iters = gpsstatus. getsatellites (). iterator (); int COUNT = 0; while (iters. hasnext () & count <= maxsatellites) {gpssatellite S = iters. next (); count ++;} system. out. println ("Search:" + Count + ""); TV _gps.settext ("Search:" + Count + ""); break; // locate start case gpsstatus. gps_event_started: log. I (TAG, "locate start"); break; // locate end case gpsstatus. gps_event_stopped: Log. I (TAG, ""); break ;};};/***** update text content in real time ** @ Param location */private void updateview (location) {If (location! = NULL) {edittext. settext ("device location \ n \ N longitude:"); edittext. append (string. valueof (location. getlongdistance (); edittext. append ("\ N latitude:"); edittext. append (string. valueof (location. getlatitude ();} else {// clear edittext object edittext. geteditabletext (). clear () ;}/ ***** return query condition * @ return */private criteria getcriteria () {Criteria = new criteria (); // sets the positioning precision criteria. accuracy_coarse is rough, criteria. accuracy_fine is more precise than criteria. setaccuracy (criteria. accuracy_fine); // sets whether the speed is required for criteria. setspeedrequired (false); // sets whether to allow the carrier to charge criteria. setcostallowed (false); // sets whether the orientation information criteria is required. setbearingrequired (false); // sets whether the elevation information criteria is required. setaltituderequired (false); // sets criteria for power supply. setpowerrequirement (criteria. power_low); return criteria;} @ override protected void ondestroy () {// todo auto-generated method stub super. ondestroy (); lm. removeupdates (locationlistener );}}

Pay attention to the permission added in the androidmainifest. xml file:

<Uses-Permission Android: Name = "android. Permission. access_coarse_location"/>
<Uses-Permission Android: Name = "android. Permission. access_fine_location"/>
<Uses-Permission Android: Name = "android. Permission. access_find_location"/>