Arcgis For Android之GPS定位实现

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();
}

@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onPause() {
super.onPause();
mapview.pause();
}
@Override
protected void onResume() {
super.onResume();
mapview.unpause();
}
}