Gold map positioning, and calculate the current anchor point and target point distance

：

1. Download the gold map and location SDK to copy the Arm folder and jar package from the demo to Libs.

2.gradle file

Apply plugin:'com.android.application'Android {compilesdkversion atbuildtoolsversion"23.0.3"sourcesets{main{jnilibs.srcdirs=['Libs']}} defaultconfig {ApplicationID"Myapplication.com.mygaode"minsdkversion thetargetsdkversion atVersioncode1Versionname"1.0"} buildtypes {release {minifyenabledfalseproguardfiles Getdefaultproguardfile ('Proguard-android.txt'),'Proguard-rules.pro'}}}dependencies {compile filetree (include: ['*.jar'], dir:'Libs') Testcompile'junit:junit:4.12'Compile'com.android.support:appcompat-v7:23.3.0'Compile files ('Libs/amap_location_v3.2.0_20161205.jar') compile files ('Libs/amap_search_v3.6.1_20161122.jar') compile files ('Libs/android_map3d_sdk_v4.1.3_20161208.jar')}

3. Configuration file:

Permission:< the copy of the website, there may be duplicate >

   <!--allow programs to set write permissions on the built-in SD card -    <uses-permissionAndroid:name= "Android.permission.WRITE_EXTERNAL_STORAGE" />    <!--allow programs to get network status -    <uses-permissionAndroid:name= "Android.permission.ACCESS_NETWORK_STATE" />    <!--allow programs to access WiFi network information -    <uses-permissionAndroid:name= "Android.permission.ACCESS_WIFI_STATE" />    <!--allows programs to read and write phone status and identity -    <uses-permissionAndroid:name= "Android.permission.READ_PHONE_STATE" />    <!--allow programs to access cellid or WiFi hotspots to get a rough location -    <uses-permissionAndroid:name= "Android.permission.ACCESS_COARSE_LOCATION" />    <!--for network positioning -    <uses-permissionAndroid:name= "Android.permission.ACCESS_COARSE_LOCATION"></uses-permission>    <!--used to access GPS positioning -    <uses-permissionAndroid:name= "Android.permission.ACCESS_FINE_LOCATION"></uses-permission>    <!--used to obtain carrier information to support interfaces that provide information about the carrier -    <uses-permissionAndroid:name= "Android.permission.ACCESS_NETWORK_STATE"></uses-permission>    <!--for accessing WiFi network information, WiFi information will be used for network location -    <uses-permissionAndroid:name= "Android.permission.ACCESS_WIFI_STATE"></uses-permission>    <!--To get access to WiFi, WiFi information is used for network location -    <uses-permissionAndroid:name= "Android.permission.CHANGE_WIFI_STATE"></uses-permission>    <!--for access to the network, network location requires Internet access -    <uses-permissionAndroid:name= "Android.permission.INTERNET"></uses-permission>    <!--used to read the current state of the phone -    <uses-permissionAndroid:name= "Android.permission.READ_PHONE_STATE"></uses-permission>    <!--for writing cached data to an extended memory card -    <uses-permissionAndroid:name= "Android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>    <!--used to request a call to the A-gps module -    <uses-permissionAndroid:name= "Android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"></uses-permission>

    <!--    German Akey        -- <  android:name= "Com.amap.api.location.APSService"></Service  >        <meta-data            android:name= " Com.amap.api.v2.apikey "            android:value=" The key value you wrote here "            />

3. The layout has only one textview to display the distance data:

The activity code is as follows:

Package Myapplication.com.mygaode;import Android.os.handler;import Android.os.message;import Android.support.v7.app.appcompatactivity;import Android.os.bundle;import Android.util.log;import Android.widget.textview;import Android.widget.toast;import Com.amap.api.location.amaplocation;import Com.amap.api.location.amaplocationclient;import Com.amap.api.location.amaplocationclientoption;import Com.amap.api.location.amaplocationlistener;import Com.amap.api.maps.amaputils;import Com.amap.api.maps.model.latlng;import Java.text.simpledateformat;import Java.util.date;public class MainActivity    Extends Appcompatactivity implements Amaplocationlistener {double lat=0,lon=0;    TextView TextView;    /** * Gold Map Location * * *//DECLARE Amaplocationclient class object, locate initiator private amaplocationclient mlocationclient = null;    Declares the Mlocationoption object, locates the parameter public amaplocationclientoption mlocationoption = null;   Declares the Mlistener object, locates the listener//identity, determines whether to display only one location information and the user repositions private Boolean isfirstloc = true; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main);        textview= (TextView) Findviewbyid (R.id.textview);    Location (); }/** * * */private void location () {//Initialize positioning mlocationclient = new Amaplocationclient (g        Etapplicationcontext ());        Set positioning callback Listener Mlocationclient.setlocationlistener (this);        Initialize positional parameters mlocationoption = new Amaplocationclientoption (); Set the positioning mode to hight_accuracy high precision mode, battery_saving for low power mode, Device_sensors is device mode only Mlocationoption.setlocationmode (        AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);        Sets whether to return address information (default return address information) mlocationoption.setneedaddress (TRUE);        Sets whether to locate only once, the default is False Mlocationoption.setoncelocation (false);        Set whether to force refresh of WiFi, default to force refresh Mlocationoption.setwifiactivescan (true); Set whether to allow impersonation location, default to False, do not allow analog location Mlocationoption.setmockenabLe (false);        Set the positioning interval, in milliseconds, the default is 2000ms Mlocationoption.setinterval (2000);        Set positioning Parameters Mlocationclient.setlocationoption (mlocationoption) for locating client objects;    Start positioning mlocationclient.startlocation ();    }/** * Method rewrite * */@Override protected void Onresume () {super.onresume ();    } @Override protected void OnPause () {super.onpause ();        } @Override protected void OnDestroy () {Super.ondestroy ();    Mlocationclient.stoplocation ();//Stop positioning Mlocationclient.ondestroy ();//Destroy the location client.    } @Override protected void Onsaveinstancestate (Bundle outstate) {super.onsaveinstancestate (outstate); }/** * */@Override public void onlocationchanged (Amaplocation amaplocation) {if (amaploc Ation! = null) {if (amaplocation.geterrorcode () = = 0) {//Locate the successful callback information, set the related message Amaplo Cation.getlocationtype ();//Get the current location result source, such as network location results, see official Positioning Type table doUble la= amaplocation.getlatitude ();//Get Latitude Double lo= amaplocation.getlongitude ();//Get Longitude AMa                Plocation.getaccuracy ();//Get accuracy information simpledateformat df = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");                Date date = new Date (Amaplocation.gettime ()); Df.format (date),///Location time amaplocation.getaddress ();//Address, if set Isneedaddress to false in option, there is no result, address information in the network location result, G                The PS locator does not return address information. Amaplocation.getcountry ();//National information amaplocation.getprovince ();//Province information amaplocation.getcity ();//City City Information Amaplocation.getdistrict ();//Urban Information amaplocation.getstreet ();//Street Information Amaploc Ation.getstreetnum ();//Street number information amaplocation.getcitycode ();//City Code Amaplocation.getadcode ();//                    Area code//If you do not set the flag bit, and then drag the map, it will continue to move the map to the current position if (Isfirstloc) {//Set the zoom level Move the map to the anchor Point//PointClick the Position button to move the center of the map to the anchor Point//Add pushpin//Amap.addmarker (Getmarkeroptions (amaplocation));                    Get location information StringBuffer buffer = new StringBuffer ();                            Buffer.append (Amaplocation.getcountry () + "" + amaplocation.getprovince () + ""                            + amaplocation.getcity () + "" + amaplocation.getprovince () + ""                            + amaplocation.getdistrict () + "" + amaplocation.getstreet () + ""                    + Amaplocation.getstreetnum ());                    Lat=la;                    Lon=lo;                    Message Message=handler.obtainmessage ();                    LATLNG latlng=new latlng (Lat,lon);                    MESSAGE.OBJ=LATLNG;                 Handler.sendmessage (message); Toast.maketext (Getapplicationcontext (), buffer.tostring () +la+ "*" +lo, Toast.length_long). Show ();                Isfirstloc = false;                }} else {//Display error message Errcode is an error code, Errinfo is an error message, see the Error code table.                        LOG.E ("Amaperror", "Location Error, Errcode:" + amaplocation.geterrorcode () + ", Errinfo:"                + Amaplocation.geterrorinfo ());            Toast.maketext (Getapplicationcontext (), "failed to locate", Toast.length_long). Show ();            }}} Handler handler=new Handler () {@Override public void Handlemessage (Message msg) {           Super.handlemessage (msg);            LATLNG latlng= (LATLNG) msg.obj;            Lat=latlng.latitude;            Lon=latlng.longitude;            /** * Calculates the distance between the current anchor point and the target point, and displays the unit in meters */latlng latlng2=new latlng (32.101937,118.777595);            float distance = amaputils.calculatelinedistance (latlng,latlng2); Textview.settext ("Current anchor point lat:" +lat+ "LON:" +lon+ "\ n Target point: lat:32.101937, lon:118.777595" + "\ n Distance:" +distance+"M"); }    };}

Gold map positioning, and calculate the current anchor point and target point distance