Android GPS Development (mrgps source code)

File: androidmanifest. xml

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

File: Main. Java

Package COM. mrsoft. mrgps. app. mr; import android. app. activity; import android. app. activitymanager; import android. app. alertdialog; import android. app. alertdialog. builder; import android. content. context; import android. content. dialoginterface; import android. content. dialoginterface. onclicklistener; import android. location. criteria; import android. location. location; import android. location. locationlistener; impo RT android. location. locationmanager; import android. OS. bundle; import android. view. keyevent; import android. view. menu; import android. view. menuitem; import android. widget. textview; import android. widget. toast; public class main extends activity {private textview TV; private locationmanager lm; private Criteria; private location; private final static int menu_about = menu. first; private fin Al static int menu_exit = menu. first + 1;/** called when the activity is first created. * // @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); TV = (textview) findviewbyid (R. id. TV); Lm = (locationmanager) getsystemservice (context. location_service); If (! Lm. isproviderenabled (Android. Location. locationmanager. gps_provider) {toast. maketext (this, "GPS is disabled. Please turn on GPS manually and try again! ", Toast. length_short ). show (); return;} else {toast. maketext (this, "GPS positioning... ", toast. length_short ). show ();} criteria = new criteria (); criteria. setaccuracy (criteria. accuracy_fine); // sets the accuracy of criteria. setaltituderequired (true); // sets the request altitude to criteria. setbearingrequired (true); // sets the request direction criteria. setcostallowed (true); // sets criteria. setpowerrequirement (criteria. power_low); // Low Power string provider = L M. getbestprovider (criteria, true); location = LM. getlastknownlocation (provider); newlocalgps (location); // listens for a 1-second ignore location change lm. requestlocationupdates (provider, 1*1000, 0, new locationlistener ();} class locationlistener implements locationlistener {@ overridepublic void onlocationchanged (location) {// todo auto-generated method stubnewlocalgps (location) ;}@ overridepublic void onproviderdisabl Ed (string provider) {// todo auto-generated method stubnewlocalgps (null) ;}@ overridepublic void onproviderenabled (string provider) {// todo auto-generated method stub} @ overridepublic void onstatuschanged (string provider, int status, bundle extras) {// todo auto-generated method stub} private void newlocalgps (location) {If (location! = NULL) {double latitude = location. getlatitude (); // double longdistance = location. getlongpolling (); // latitude double speed = location. getspeed (); // speed double altitude = location. getaltitude (); // double bearing = location. getbearing (); // orientation TV. settext ("precision" + latitude + '\ n' + "latitude" + longpolling +' \ n' + "Speed" + speed + "m/s" + '\ N' + "" + altitude + "M" + '\ n' + "" + bearing +' \ n ');} else {// location where no geographic information is obtained TV. settext ("the location of geographic information is unknown or Retrieving location of geographic information... ") ;}@ overridepublic Boolean oncreateoptionsmenu (menu) {// todo auto-generated method stub menu. add (0, menu_about, 1, "about"); menu. add (0, menu_exit, 2, "exit"); return Super. oncreateoptionsmenu (menu) ;}@ overridepublic Boolean onoptionsitemselected (menuitem item) {// todo auto-generated method stubswitch (item. getitemid () {Case menu_about: alertdialog. builder BD = new Builder (main. This); BD. setmessage ("mrgps.apk \ n version: 1.0 \ n Author: mrandexe"); BD. settitle ("about"); BD. setpositivebutton ("OK", new onclicklistener () {@ override public void onclick (dialoginterface arg0, int arg1) {// todo auto-generated method stub arg0.dismiss ();}}); BD. create (). show (); break; Case menu_exit: exit (); break;} return Super. onoptionsitemselected (item) ;}@ override public Boolean onkeydown (INT keycode, keyevent Event) {// todo auto-generated method stub if (keycode = keyevent. keycode_back & event. getrepeatcount () = 0) {exit (); Return true;} return Super. onkeydown (keycode, event);} private void exit () {alertdialog. builder = new Builder (main. this); builder. setmessage ("are you sure you want to exit? "); Builder. settitle ("prompt"); builder. setpositivebutton ("OK", new onclicklistener () {@ override public void onclick (dialoginterface arg0, int arg1) {// todo auto-generated method stub arg0.dismiss (); activitymanager actmgr = (activitymanager) getsystemservice (activity_service); actmgr. restartpackage (getpackagename () ;}}); builder. setnegativebutton ("cancel", new onclicklistener () {@ override public void onclick (dialoginterface dialog, int which) {// todo auto-generated method stub dialog. dismiss () ;}}); builder. create (). show ();}}

File: Main. xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent">    <TextView android:text="TextView" android:layout_width="wrap_content" android:id="@+id/tv" android:layout_height="wrap_content"></TextView></LinearLayout>