ArcGIS for Android实现地图加载、放大缩小及定位功能

ArcGIS for Android实现地图加载、放大缩小及定位功能

1. java代码

package com.map.mapgis;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.ZoomControls;

import java.util.List;

import com.esri.android.map.GraphicsLayer;
import com.esri.android.map.MapView;
import com.esri.android.map.ags.ArcGISTiledMapServiceLayer;
import com.esri.core.geometry.GeometryEngine;
import com.esri.core.geometry.Point;
import com.esri.core.geometry.SpatialReference;
import com.esri.core.map.Graphic;
import com.esri.core.symbol.PictureMarkerSymbol;

public class MapgisActivity extends Activity {
    Button GPS_btn;
    MapView mMapView ;
    ArcGISTiledMapServiceLayer tileLayer;
    Point point;
    Point wgspoint;
    GraphicsLayer gLayerPos;
    PictureMarkerSymbol locationSymbol;
    LocationManager locMag;
    Location loc ;
    Point mapPoint;
    TextView txtview;
    ZoomControls zoomCtrl;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mMapView = (MapView)findViewById(R.id.map);
        tileLayer = new ArcGISTiledMapServiceLayer(
                "http://cache1.arcgisonline.cn/ArcGIS/rest/services/ChinaOnlineCommunity/MapServer");
        mMapView.addLayer(tileLayer);
        zoomCtrl=(ZoomControls)findViewById(R.id.zoomCtrl);
        zoomCtrl.setOnZoomInClickListener(new OnClickListener() {           
            public void onClick(View v) {
                // TODO Auto-generated method stub
                mMapView.zoomin();
            }
        });
        zoomCtrl.setOnZoomOutClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                mMapView.zoomout();
            }
        });
        gLayerPos = new GraphicsLayer();
        mMapView.addLayer(gLayerPos);
        locationSymbol =  new PictureMarkerSymbol(this.getResources().getDrawable(R.drawable.location));
        locMag = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
        //获取所有可用的位置提供器
        GPS_btn=(Button)findViewById(R.id.GPS_btn);
        GPS_btn.setOnClickListener(new OnClickListener() {          
            public void onClick(View v) {
                // TODO Auto-generated method stub          
           final List<String> providers=locMag.getProviders(true);
           for(String provider:providers)
            {
             loc = locMag.getLastKnownLocation(provider);   
             LocationListener locationListener = new LocationListener(){
                public void onLocationChanged(Location location) {
                    markLocation(location);
                }
                public void onProviderDisabled(String arg0) 
                {
                }
                public void onProviderEnabled(String arg0) 
                {
                }
                public void onStatusChanged(String arg0, int arg1, Bundle arg2) 
                {
                }
            };      
            locMag.requestLocationUpdates(provider, 2000, 10, locationListener);
            if(loc!=null)
            {
                markLocation(loc);
            }
           }
          }
        });
    }
    private void markLocation(Location location)
    {       
        gLayerPos.removeAll();
        double locx = location.getLongitude();//经度
        double locy = location.getLatitude();//纬度
        wgspoint = new Point(locx, locy);  
        //定位到所在位置
        mapPoint = (Point) GeometryEngine.project(wgspoint,SpatialReference.create(4326),mMapView.getSpatialReference());
        Graphic graphic = new Graphic(mapPoint,locationSymbol);
        gLayerPos.addGraphic(graphic);  
        mMapView.centerAt(mapPoint, true);
        mMapView.setScale(100);
        mMapView.setMaxResolution(300);
    }
    @Override 
    protected void onDestroy() { 
        super.onDestroy();
 }
    @Override
    protected void onPause() {
        super.onPause();
        mMapView.pause();
 }
    @Override   protected void onResume() {
        super.onResume(); 
        mMapView.unpause();
    }

}

---

main.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <!-- MapView layout and initial extent -->
    <com.esri.android.map.MapView
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        initExtent = "-20037507.0672, -30240971.9584, 20037507.0672, 30240971.9584">
    </com.esri.android.map.MapView>     
    <ZoomControls 
        android:id="@+id/zoomCtrl"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_marginBottom="15.0dip"
        android:layout_marginRight="5.0dip"/>
    <Button
        android:id="@+id/GPS_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="27.0dip"
        android:layout_marginLeft="10.0dip"
        android:background="@drawable/gps_btn_selector"
        />      
</RelativeLayout>

• 定位按钮xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
     <item android:drawable="@drawable/ic_location" android:state_pressed="false"/>
      <item android:drawable="@drawable/ic_location_press" android:state_pressed="true"/>

</selector>

• AndroidManifest.xml添加权限

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature android:glEsVersion="0x00020000" android:required="true"/> 

如图，效果还是可以的~精度不是很高，模拟器运行要实现定位需要给模拟器发送一个经纬度才行
附上代码连接，有需要的可以下载看看
Arcgis For Android定位功能源码