Arcgis andoid开发之应用百度地图接口实现精准定位与显示

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("\nerror code : ");
		      sb.append(location.getLocType());
		      sb.append("\nlatitude : ");
		      sb.append(location.getLatitude());
		      sb.append("\nlontitude : ");
		      sb.append(location.getLongitude());
		      sb.append("\nradius : ");
		      sb.append(location.getRadius());
		      if (location.getLocType() == BDLocation.TypeGpsLocation)
		      {
		          sb.append("\nspeed : ");
		          sb.append(location.getSpeed());
		          sb.append("\nsatellite : ");
		          sb.append(location.getSatelliteNumber());
		           
		      } 
		      else if (location.getLocType() == BDLocation.TypeNetWorkLocation)
		      {
		    	  sb.append("\naddr : ");
		          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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