Arcgis For Android之GPS定位实现

翻开以前做的东西，看了看，很多从逻辑上比较乱，对之做了修改，完成后实现的效果为：
MapActivity源代码如下：
package com.lzugis.map;import java.io.File;import java.util.Iterator;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.location.GpsSatellite;import android.location.GpsStatus;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.location.LocationProvider;import android.os.Bundle;import android.os.Environment;import android.provider.Settings;import android.util.Log;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;import com.esri.android.map.GraphicsLayer;import com.esri.android.map.MapView;import com.esri.android.map.ags.ArcGISLocalTiledLayer;import com.esri.android.runtime.ArcGISRuntime;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;import com.lzugis.tool.ZoomCtrl;public class MapActivity extends Activity {private static File dataFile;private static String dirName;private static String filename;private LocationListener locationListener = new LocationListener(){  /**         * 位置信息变化时触发         */    public void onLocationChanged(Location location) {markLocation(location);}    /**         * 状态改变时调用         */public void onStatusChanged(String provider, int status, Bundle extras) {switch (status) {            //GPS状态为可见时            case LocationProvider.AVAILABLE:            showToast("当前GPS状态为可见状态");                Log.i("TAG", "当前GPS状态为可见状态");                break;            //GPS状态为服务区外时            case LocationProvider.OUT_OF_SERVICE:            showToast("当前GPS状态为服务区外状态");                Log.i("TAG", "当前GPS状态为服务区外状态");                break;            //GPS状态为暂停服务时            case LocationProvider.TEMPORARILY_UNAVAILABLE:            showToast("当前GPS状态为暂停服务状态");                Log.i("TAG", "当前GPS状态为暂停服务状态");                break;            }}    /**         * GPS开启时触发         */public void onProviderEnabled(String provider) {showToast("GPS打开");Location location=locMag.getLastKnownLocation(provider);markLocation(location);}/**         * GPS禁用时触发         */public void onProviderDisabled(String provider) {showToast("GPS已关闭");}};MapView mapview;ArcGISLocalTiledLayer local;ZoomCtrl zoomCtrl;GraphicsLayer gLayerGps;Button btnPosition;Toast toast;LocationManager locMag;Location loc ;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main_map);        //去除水印        ArcGISRuntime.setClientId("1eFHW78avlnRUPHm");                //要定位在地图中的位置，需要知道当前位置，而当前位置有Location对象决定，        //但是，Location对象又需要LocationManager对象来创建。        //创建LocationManager的唯一方法        locMag = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);                mapview = (MapView)findViewById(R.id.map);        dataFile = Environment.getExternalStorageDirectory();        dirName = this.getResources().getString(R.string.offline_dir);filename = this.getResources().getString(R.string.local_tpk);    String basemap = "file://"+dataFile + File.separator +dirName + File.separator + filename;    local = new ArcGISLocalTiledLayer(basemap);    mapview.addLayer(local);        //放大与缩小    zoomCtrl = (ZoomCtrl) findViewById(R.id.ZoomControl);    zoomCtrl.setMapView(mapview);        gLayerGps = new GraphicsLayer();    mapview.addLayer(gLayerGps);              btnPosition=(Button)findViewById(R.id.btnPosition);    btnPosition.setOnClickListener(new OnClickListener(){    public void onClick(View v) {    //判断GPS是否正常启动            if(!locMag.isProviderEnabled(LocationManager.GPS_PROVIDER)){                showToast("请开启GPS导航...");                //返回开启GPS导航设置界面                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);                   startActivityForResult(intent,0);                 return;            }            Location location= locMag.getLastKnownLocation(LocationManager.GPS_PROVIDER);              markLocation(location);            locMag.addGpsStatusListener(listener);    locMag.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0, locationListener);    }    });    }        //状态监听    GpsStatus.Listener listener = new GpsStatus.Listener() {        public void onGpsStatusChanged(int event) {            switch (event) {            //第一次定位            case GpsStatus.GPS_EVENT_FIRST_FIX:                Log.i("TAG", "第一次定位");                break;            //卫星状态改变            case GpsStatus.GPS_EVENT_SATELLITE_STATUS:                Log.i("TAG", "卫星状态改变");                //获取当前状态                GpsStatus gpsStatus=locMag.getGpsStatus(null);                //获取卫星颗数的默认最大值                int maxSatellites = gpsStatus.getMaxSatellites();                //创建一个迭代器保存所有卫星                 Iterator<GpsSatellite> iters = gpsStatus.getSatellites().iterator();                int count = 0;                     while (iters.hasNext() && count <= maxSatellites) {                         GpsSatellite s = iters.next();                         count++;                     }                   System.out.println("搜索到："+count+"颗卫星");                break;            //定位启动            case GpsStatus.GPS_EVENT_STARTED:                Log.i("TAG", "定位启动");                break;            //定位结束            case GpsStatus.GPS_EVENT_STOPPED:                Log.i("TAG", "定位结束");                break;            }        };    };        private void markLocation(Location location){    if(location!=null){    Log.i("TAG", "时间："+location.getTime());         Log.i("TAG", "经度："+location.getLongitude());         Log.i("TAG", "纬度："+location.getLatitude());         Log.i("TAG", "海拔："+location.getAltitude()); double locx = location.getLongitude();double locy = location.getLatitude();ShowPointOnMap(locx,locy);    }}        public void ShowPointOnMap(double lon,double lat){//清空定位图层gLayerGps.removeAll(); //接收到的GPS的信号X(lat),Y(lon)double locx = lon;double locy = lat;Point wgspoint = new Point(locx, locy);  Point mapPoint = (Point) GeometryEngine.project(wgspoint,SpatialReference.create(4326),mapview.getSpatialReference());//图层的创建//Graphic graphic = new Graphic(mapPoint,new SimpleMarkerSymbol(Color.RED,18,STYLE.CIRCLE));PictureMarkerSymbol pms =  new PictureMarkerSymbol(this.getResources().getDrawable(R.drawable.location));Graphic graphic = new Graphic(mapPoint,pms);gLayerGps.addGraphic(graphic);}        private void showToast(String msg){          if(toast == null)        {          toast = Toast.makeText(this, msg, Toast.LENGTH_SHORT);          }        else        {          toast.setText(msg);          toast.setDuration(Toast.LENGTH_SHORT);        }          toast.setGravity(Gravity.BOTTOM, 0, 0);        toast.show();      } @Overrideprotected void onDestroy() {super.onDestroy();}@Overrideprotected void onPause() {super.onPause();mapview.pause();}@Overrideprotected void onResume() {super.onResume();mapview.unpause();}}
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