怀着激动、兴奋的心情，在这个漫天柳絮的季节写下了这片博文，为什么呢，因为困扰我很久的一个技术性的问题得到了解决，发次博文，供大家参观、学习，同时，也以慰藉我长期困扰的心情，好了，废话不再，言归正传，看看这到底是个什么东西？
首先，简单地介绍一下功能：1、离线地图的加载；2、GPS的定位与显示。文字比较模糊，看看实际的效果图：
功能其实很简单，下面解释一下实现思路：
1、布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<com.esri.android.map.MapView
android:id="@+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</com.esri.android.map.MapView>
<Button
android:id="@+id/btnStartGps"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:text="GPS定位" />
</RelativeLayout>布局很简单，一个mapView，用来显示地图；一个button，用来触发GPS开始定位。
2、配置文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.esri.arcgis.android.samples.localtiledlayer"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:icon="@drawable/icon"
android:label="@string/app_name" >
<activity
android:name="com.esri.arcgis.android.samples.localtiledlayer.LocalTiledLayer"
android:configChanges="orientation"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name="com.baidu.location.f"
android:enabled="true"
android:process=":remote" >
</service>
</application>
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
<uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
<permission android:name="android.permission.BAIDU_LOCATION_SERVICE" >
</permission>
<uses-permission android:name="android.permission.BAIDU_LOCATION_SERVICE" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" >
</uses-permission>
<uses-permission android:name="android.permission.INTERNET" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" >
</uses-permission>
<!-- <uses-permission android:name="android.permission.WRITE_APN_SETTINGS"></uses-permission> -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" >
</uses-permission>
<uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" />
<uses-permission android:name="android.permission.WAKE_LOCK" >
</uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<!-- SDK1.5需要android.permission.GET_TASKS权限判断本程序是否为当前运行的应用? -->
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.CAMERA" >
</uses-permission>
<uses-permission android:name="android.permission.RECORD_AUDIO" >
</uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" >
</uses-permission>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.BROADCAST_STICKY" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<!-- 来电消音 -->
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" >
</uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<supports-screens
android:anyDensity="true"
android:largeScreens="true"
android:normalScreens="false"
android:resizeable="true"
android:smallScreens="true" />
</manifest>具体啥意思，自己去看看相关的资料吧，我在此不多做解释。
3、activity实现
package com.esri.arcgis.android.samples.localtiledlayer;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.MKGeneralListener;
import com.baidu.mapapi.map.MKEvent;
import com.esri.android.map.GraphicsLayer;
import com.esri.android.map.MapView;
import com.esri.android.map.ags.ArcGISLocalTiledLayer;
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.SimpleMarkerSymbol;
import com.esri.core.symbol.SimpleMarkerSymbol.STYLE;
public class LocalTiledLayer extends Activity {
private MapView map = null;
private ArcGISLocalTiledLayer local;
//提示信息
private Toast toast;
/**
* GPS定位
*/
private GraphicsLayer gLayerGps;
private Point wgspoint;
private Point mapPoint;
private Button btnGPS;
//定位SDK的核心类
private LocationClient mLocClient;
//是否手动触发请求定位
private boolean isRequest = true;
//是否首次定位
private boolean isFirstLoc = true;
//地图显示
private BMapManager mBMapMan = null;
private int requestTime=0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
map = (MapView) findViewById(R.id.map);
mLocClient = new LocationClient(getApplicationContext());
mLocClient.registerLocationListener(new BDLocationListenerImpl());//注册定位监听接口
/**
* LocationClientOption 该类用来设置定位SDK的定位方式。
*/
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true); //打开GPRS
option.setAddrType("all");//返回的定位结果包含地址信息
option.setCoorType("bd09ll");//返回的定位结果是百度经纬度,默认值gcj02
option.setPriority(LocationClientOption.GpsFirst); // 设置GPS优先
option.setScanSpan(1000); //设置发起定位请求的间隔时间为1s
option.disableCache(true);//启用缓存定位
mLocClient.setLocOption(option); //设置定位参数
local = new ArcGISLocalTiledLayer("file:///storage/sdcard0/arcgis/base_map.tpk");
map.addLayer(local);
gLayerGps = new GraphicsLayer();
map.addLayer(gLayerGps);
//开始定位按钮
btnGPS=(Button)findViewById(R.id.btnStartGps);
btnGPS.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
mLocClient.start();//调用此方法开始定位
requestLocation();
}
});
}
public void requestLocation()
{
isRequest = true;
if(mLocClient != null && mLocClient.isStarted())
{
showToast("GPS正在定位……");
mLocClient.requestLocation();
}
else
{
Log.d("log", "locClient is null or not started");
}
}
public class MKGeneralListenerImpl implements MKGeneralListener
{
/**
* 一些网络状态的错误处理回调函数
*/
@Override
public void onGetNetworkState(int iError)
{
if (iError == MKEvent.ERROR_NETWORK_CONNECT)
{
showToast("您的网络出错啦！");
}
}
/**
* 授权错误的时候调用的回调函数
*/
@Override
public void onGetPermissionState(int iError)
{
if (iError == MKEvent.ERROR_PERMISSION_DENIED)
{
showToast("API KEY错误, 请检查！");
}
}
}
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.show();
}
/**
* 将GPS点标注在地图上
* @param 纬度
* @param 经度
*/
public void ShowGpsOnMap(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;
wgspoint = new Point(locx, locy);
mapPoint = (Point) GeometryEngine.project(wgspoint,SpatialReference.create(4326),map.getSpatialReference());
//图层的创建
Graphic graphic = new Graphic(mapPoint,new SimpleMarkerSymbol(Color.RED,18,STYLE.CIRCLE));
gLayerGps.addGraphic(graphic);
}
public class BDLocationListenerImpl implements BDLocationListener
{
/**
* 接收异步返回的定位结果，参数是BDLocation类型参数
*/
@Override
public void onReceiveLocation(BDLocation location)
{
if (location == null)
{
return;
}
StringBuffer sb = new StringBuffer(256);
sb.append("time : ");
sb.append(location.getTime());
sb.append("
error code : ");
sb.append(location.getLocType());
sb.append("
latitude : ");
sb.append(location.getLatitude());
sb.append("
lontitude : ");
sb.append(location.getLongitude());
sb.append("
radius : ");
sb.append(location.getRadius());
if (location.getLocType() == BDLocation.TypeGpsLocation)
{
sb.append("
speed : ");
sb.append(location.getSpeed());
sb.append("
satellite : ");
sb.append(location.getSatelliteNumber());
}
else if (location.getLocType() == BDLocation.TypeNetWorkLocation)
{
sb.append("
addr : ");
sb.append(location.getAddrStr());
}
Log.e("log", sb.toString());
if(isFirstLoc || isRequest)
{
isRequest = false;
}
isFirstLoc = false;
double lat=location.getLatitude();
double lon=location.getLongitude();
ShowGpsOnMap(lon,lat);
}
@Override
public void onReceivePoi(BDLocation arg0) {
// TODO Auto-generated method stub
}
}
}相对来说，注释也是很清楚地，就不做多解释，思路大概是：
显示地图——》接收位置信息，获取经纬度——》将经纬度转换为点在地图上标绘
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