Android implementation of GPS positioning code example _android

Obtained by GPS is a location type of longitude and latitude, can be converted to two double latitude and longitude.
Latitude: 23.223871812820435
Latitude: 113.58986039161628
First create a TextView and two button

<textview 
 android:id= "@+id/text"
 android:layout_width= fill_parent "android:layout_height=" Wrap 
  _content "  />
 
 <button
  android:id=
  @+id/btnstart" android:layout_width= "Wrap_content" android:layout_height= "Wrap_content"
  android:text= "positioning"/>
 <button android:id=
  "@+id/btnstop"
  android:layout_width= "wrap_content"
  android:layout_height= "wrap_content"
  android:text= "Stop"/ >

Then add the code for the main activity
Location is a type that holds the latitude and longitude degree
Locationmanager is the Location Management service type

Private Button btnstart;
Private Button btnstop;
Private TextView TextView;
Private Location mlocation;
Private Locationmanager Mlocationmanager; /** called the activity is a.
 * * @Override public void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
 
 Setcontentview (R.layout.main);
 btnstart = (Button) Findviewbyid (R.id.btnstart);
 Btnstop = (Button) Findviewbyid (r.id.btnstop);
 TextView = (TextView) Findviewbyid (R.id.text); Btnstart.setonclicklistener (Btnclicklistener); Start positioning Btnstop.setonclicklistener (Btnclicklistener);
End Position button Gpsisopen was written by himself to see if the current GPS is open getLocation is a way to get location information by itself Mlocationmanager.removeupdates () is to stop the current GPS position monitoring Public Button.onclicklistener Btnclicklistener = new Button.onclicklistener () {public void OnClick (View v) {Button b
  TN = (Button) v;
   
  if (btn.getid () = = R.id.btnstart) {if (!gpsisopen ()) return;
   
   Mlocation = GetLocation (); if (mlocation!= null) textview.settext ("Dimension:" + Mlocation.getLatitude () + "\ n Longitude:" + mlocation.getlongitude ());
  else Textview.settext ("Get No Data");
  else if (btn.getid () = = R.id.btnstop) {mlocationmanager.removeupdates (Locationlistener);
}

 }
};

 Private Boolean Gpsisopen () {Boolean bRet = true;
 Locationmanager alm = (locationmanager) this.getsystemservice (Context.location_service); if (!alm.isproviderenabled (Locationmanager.gps_provider)) {Toast.maketext (this, "GPS not turned on", Toast.length_short). Show
  ();
 BRet = false;
 else {Toast.maketext (this, "GPS is turned on", Toast.length_short). Show ();
return bRet;
 
 Determine whether the current open GPS private Boolean Gpsisopen () {Boolean bRet = true;
 Locationmanager alm = (locationmanager) this.getsystemservice (Context.location_service); if (!alm.isproviderenabled (Locationmanager.gps_provider)) {Toast.maketext (this, "GPS not turned on", Toast.length_short). Show
  ();
 BRet = false;
 else {Toast.maketext (this, "GPS is turned on", Toast.length_short). Show ();
return bRet; This method obtains the current latitude and longitude, and the first fetch is always null behind from the LocationliStener get changed position mlocationmanager.requestlocationupdates () is to open a Locationlistener wait position change private Location getLocation ()

 {//Get location Management Service Mlocationmanager = (Locationmanager) this.getsystemservice (Context.location_service);
 Find service Information the criteria criteria = new criteria (); Criteria.setaccuracy (Criteria.accuracy_fine); Positioning accuracy: Highest criteria.setaltituderequired (false); Elevation information: criteria.setbearingrequired (FALSE) is not required;  Azimuth information: criteria.setcostallowed (TRUE) is not required; Whether to allow paid criteria.setpowerrequirement (Criteria.power_low); Power consumption: low-power String Provider = Mlocationmanager.getbestprovider (criteria, true);
 
 Obtain GPS information Location Location = mlocationmanager.getlastknownlocation (provider);
 
 Mlocationmanager.requestlocationupdates (provider, Watts, 5, Locationlistener);
return location; The modified method is to wait for the GPS position to be changed to get a new latitude and longitude private final locationlistener Locationlistener = new Locationlistener () {public void onlocation Changed (Location Location) {//TODO auto-generated Method stub if (Location!= null) TextView.SetText ("Dimension:" + location.getlatitude () + "\ n Longitude:" + location.getlongitude ());
 else Textview.settext ("Get No Data" + integer.tostring (ncount)); The public void onproviderdisabled (String provider) {//TODO auto-generated a stub} public void Onproviderena Bled (string provider) {//TODO auto-generated method stub} public void Onstatuschanged (string provider, int status

 , Bundle Extras) {//TODO auto-generated Method stub}};