Complete sample of geographic information such as longitude, latitude, etc. using Locationmanager

Mainactivity as follows:

Package Cc.bb;import Java.util.iterator;import Java.util.list;import android.location.location;import Android.location.locationlistener;import Android.location.locationmanager;import Android.os.Bundle;import Android.widget.textview;import Android.app.activity;import android.content.context;/** * Demo Description: * positioning function with Locationmanager * 1 real-time update of longitude, Latitude * 2 get geographic information based on latitude and longitude (e.g. country, street, etc.) (skip) * * * NOTE: * 0 in the test GPS positioning preferably in a relatively broad space, otherwise affect positioning * 1 use Mlocationmanager.getlastknownlocation (Gpsprovider) gets location is often null.   * Because the device positioning takes a certain amount of time, so put the positioning logic in Locationmanager's Requestlocationupdates () method * * 2 Locationmanager.requestlocationupdates * (String provider, long mintime, float mindistance, Locationlistener listener) * First parameter: location information of the provider, such as GPS * second parameter: Update bit Interval of information, per millisecond * Third parameter: Update location information distance interval, unit meter * Fourth parameter: callback when position information changes * * 3 Locationlistener The most important callback method Onlocationchanged () * When MI  This method is called when both Ntime and mindistance are satisfied. Document Description: * The Mindistance parameter can also be used to control the * frequency of location Updates. If IT is greater than 0 and the * location provider would only send your application a update when * the location has Cha Nged by at least mindistance meters, and * at least mintime milliseconds has passed. * Such as interval time (Mintime) to 3 seconds and moving distance (mindistance) is greater than 5 m * then this method is called. * * 4 Cancel Geo-location updates when activity is OnDestroy (). * * * Permissions configuration: * <uses-permission android:name= "Android.permission.ACCESS_FINE_LOCATION"/> * <uses-permission and Roid:name= "Android.permission.ACCESS_COARSE_LOCATION"/> * <uses-permission android:name= " Android.permission.ACCESS_MOCK_LOCATION "/> * <uses-permission android:name=" Android.permission.INTERNET "/ > */public Class Mainactivity extends Activity {private Context mcontext;private TextView mtextview;private Locationma Nager mlocationmanager;private Locationlistenerimpl mlocationlistenerimpl; @Overrideprotected void OnCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.main); init (); Initlocationmanager (Mcontext);} private void Init () {mcontext=this;mtextview= (TextView) Findviewbyid (R.id.textview);} private void Initlocationmanager (context context) {mlocationmanager= (Locationmanager) Context.getsystemservice ( Context.location_service);//Gets the available location information provider. That is, one or several list<string> providerlist= in Passive,network,gps Mlocationmanager.getproviders (True); for (iterator<string> Iterator = Providerlist.iterator (); Iterator.hasnext ();) {String Provider = (string) iterator.next (); System.out.println ("provider=" +provider); In this way, the location information is obtained by GPS string Gpsprovider=locationmanager.gps_provider; Location Location=mlocationmanager.getlastknownlocation (gpsprovider); if (location!=null) {double longitude= Location.getlongitude ();d ouble altitude=location.getaltitude (); System.out.println ("longitude=" +longitude+ ", altitude=" +altitude);} else {System.out.println ("Location==null");} Register Location Monitor Mlocationlistenerimpl=new Locationlistenerimpl (); Mlocationmanager.requestlocationupdates ( Locationmanager.gps_provider, 5, mlocationlIstenerimpl);} Private class Locationlistenerimpl implements locationlistener{//call this method when the device location changes @overridepublic void Onlocationchanged (location location) {if (location!=null) {showlocation (location);}} This method is called when the state of the provider changes. For example, GPS from available to unavailable. @Overridepublic void Onstatuschanged (String provider, int status, Bundle Extras) {}//Call this method when provider is opened. For example, the user opens gps@overridepublic void onproviderenabled (String provider) {}// This method is called when the provider is closed. For example, close open gps@overridepublic void onproviderdisabled (String provider) {}}private void showlocation ( Location location) {//Gets the longitude double longitude = location.getlongitude ();//Gets the latitude double altitude = location.getaltitude (); String message= "Longitude:" +longitude+ "\ n" + "Latitude:" +altitude;mtextview.settext (message); @Overrideprotected void OnDestroy () {Super.ondestroy (); if (mlocationmanager!=null) {mlocationmanager.removeupdates ( Mlocationlistenerimpl);}}}

Main.xml as follows:

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android"    xmlns:tools= "http// Schemas.android.com/tools "    android:layout_width=" match_parent "    android:layout_height=" Match_parent "    android:paddingbottom= "@dimen/activity_vertical_margin"    android:paddingleft= "@dimen/activity_ Horizontal_margin "    android:paddingright=" @dimen/activity_horizontal_margin "    android:paddingtop=" @dimen /activity_vertical_margin "    tools:context=". Mainactivity ">    <textview        android:id=" @+id/textview "        android:layout_width=" Fill_parent "        android:layout_height= "fill_parent"        android:layout_centerinparent= "true"        android:gravity= " Center "/></relativelayout>

Complete sample of geographic information such as longitude, latitude, etc. using Locationmanager