gps - How to store a value from a textbox android? -

i developing gps program in getting gps values every 5 minutes, , working great, have store values get. has been refreshed every 5 minutes , have 1 text view deletes old values when new 1 refreshed.

this code.

protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          intent intent = new intent("android.location.gps_enabled_change");          intent.putextra("enabled", true);          this.sendbroadcast(intent);          string provider = settings.secure.getstring(getcontentresolver(), settings.secure.location_providers_allowed);         if(!provider.contains("gps")){ //if gps disabled             final intent poke = new intent();             poke.setclassname("com.android.settings", "com.android.settings.widget.settingsappwidgetprovider");              poke.addcategory(intent.category_alternative);             poke.setdata(uri.parse("3"));              this.sendbroadcast(poke);           }     {         //initialize location manager         manager =  (locationmanager) getsystemservice(context.location_service);         //check if gps enabled         //if not, notify user toast         if (!manager.isproviderenabled(locationmanager.gps_provider)); else {             //get location provider location manager             //empty criteria searches through providers , returns best 1             string providername = manager.getbestprovider(new criteria(), true);             location location = manager.getlastknownlocation(providername);              textview tv = (textview)findviewbyid(r.id.locationresults);             if (location != null) {                 tv.settext(location.getlatitude() + " latitude, " + location.getlongitude() + " longitude");             } else {                 tv.settext("last known location not found. waiting updated location...");             }             //sign notified of location updates every 15 seconds - production code should @ least minute             manager.requestlocationupdates(providername, 60000, 1, this);         }     } }      @override     public void onlocationchanged(location location) {         textview tv = (textview)findviewbyid(r.id.locationresults);         if (location != null) {             tv.settext(location.getlatitude() + " latitude, " + location.getlongitude() + " longitude");         } else {             tv.settext("problem getting location");         }     }      @override     public void onproviderdisabled(string arg0) {}      @override     public void onproviderenabled(string arg0) {}      @override     public void onstatuschanged(string arg0, int arg1, bundle arg2) {}      // find closest bart station     public string findclosestbart(location loc) {         double lat = loc.getlatitude();         double lon = loc.getlongitude();          double curstatlat = 0;         double curstatlon = 0;         double shortestdistsofar = double.positive_infinity;         double curdist;         string curstat = null;         string closeststat = null;          //sort through stations         // write sort of loop using api.          curdist = math.sqrt( ((lat - curstatlat) * (lat - curstatlat)) +                         ((lon - curstatlon) * (lon - curstatlon)) );         if (curdist < shortestdistsofar) {             closeststat = curstat;         }          return closeststat;          }    

thank you.

you can store textview's value file persistance storage. study answer properly, adding file store method in existing code,

protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          intent intent = new intent("android.location.gps_enabled_change");          intent.putextra("enabled", true);          this.sendbroadcast(intent);          string provider = settings.secure.getstring(getcontentresolver(), settings.secure.location_providers_allowed);         if(!provider.contains("gps")){ //if gps disabled             final intent poke = new intent();             poke.setclassname("com.android.settings", "com.android.settings.widget.settingsappwidgetprovider");              poke.addcategory(intent.category_alternative);             poke.setdata(uri.parse("3"));              this.sendbroadcast(poke);           }     {         //initialize location manager         manager =  (locationmanager) getsystemservice(context.location_service);         //check if gps enabled         //if not, notify user toast         if (!manager.isproviderenabled(locationmanager.gps_provider)); else {             //get location provider location manager             //empty criteria searches through providers , returns best 1             string providername = manager.getbestprovider(new criteria(), true);             location location = manager.getlastknownlocation(providername);              textview tv = (textview)findviewbyid(r.id.locationresults);             if (location != null) {                 tv.settext(location.getlatitude() + " latitude, " + location.getlongitude() + " longitude");             } else {                 tv.settext("last known location not found. waiting updated location...");             }             //sign notified of location updates every 15 seconds - production code should @ least minute             manager.requestlocationupdates(providername, 60000, 1, this);         }     } }      @override     public void onlocationchanged(location location) {         textview tv = (textview)findviewbyid(r.id.locationresults);         if (location != null) {             tv.settext(location.getlatitude() + " latitude, " + location.getlongitude() + " longitude");           // have added line           appenddata ( location.getlatitude() + " latitude, " + location.getlongitude() + " longitude" );         } else {             tv.settext("problem getting location");         }     }      @override     public void onproviderdisabled(string arg0) {}      @override     public void onproviderenabled(string arg0) {}      @override     public void onstatuschanged(string arg0, int arg1, bundle arg2) {}      // find closest bart station     public string findclosestbart(location loc) {         double lat = loc.getlatitude();         double lon = loc.getlongitude();          double curstatlat = 0;         double curstatlon = 0;         double shortestdistsofar = double.positive_infinity;         double curdist;         string curstat = null;         string closeststat = null;          //sort through stations         // write sort of loop using api.          curdist = math.sqrt( ((lat - curstatlat) * (lat - curstatlat)) +                         ((lon - curstatlon) * (lon - curstatlon)) );         if (curdist < shortestdistsofar) {             closeststat = curstat;         }          return closeststat;          }         // method write in file  public void appenddata(string text) {           file datafile = new file("sdcard/gpsdata.txt");    if (!datafile.exists())    {       try       {          datafile.createnewfile();       }        catch (ioexception e)       {          // todo auto-generated catch block          e.printstacktrace();       }    }    try    {       //bufferedwriter performance, true set append file flag       bufferedwriter buf = new bufferedwriter(new filewriter(datafile, true));        buf.append(text);       buf.newline();       buf.close();    }    catch (ioexception e)    {       // todo auto-generated catch block       e.printstacktrace();    } } 

you need write following permission in androidmanifest.xml

<uses-permission android:name="android.permission.write_external_storage" />