Xamarin只言片语4——Xamarin.Android百度地图绑定

先下载百度地图http://lbsyun.baidu.com/sdk/download?selected=mapsdk_basicmap,mapsdk_searchfunction,mapsdk_lbscloudsearch,mapsdk_calculationtool
百度地图绑定库文件
新建一个BindingsLibrary项目，并把刚下载的BaiduLBS_Android.jar添加到项目的Jars文件夹下，更改BaiduLBS_Android.jar的属性中的”生成操作”属性为EmbeddedJar
生成些项目，如果遇到这样的错误：
VersionInfo”: 成员名不能与它们的封闭类型相同
打开项目中的Transforms的Metadate.xml，在<metadata>节点添加如下代码

<
attr

path
=
"
/api/package[@name='com.baidu.mapapi']/class[@name='VersionInfo']/field[@name='VERSION_INFO']
"

name
=
"
name
"
>
VersionInfos
</
attr
>

因为在C#中不能定义和类名相同的类成员（构造函数除外）
创建andorid项目
在项目中创建一个libs文件夹，把下载的百度地图包中的.so文件添加进来，并在属性上设置成AndroidNativeLibrary



添加权限和设置百度地图访问应用Key

<application android:label="BaiduMapDemo" android:icon="@drawable/Icon">
<meta-data android:name="com.baidu.lbsapi.API_KEY" android:value="这个需要注册百度开放平台申请Android的Key" />
</application>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<!-- 这个权限用于获取wifi的获取权限，wifi信息会用来进行网络定位-->
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
<!-- 用于读取手机当前的状态-->
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
在布局文件中添加地图控件（注意大小写：）
<com.baidu.mapapi.map.MapView
android:id="@+id/bmapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true" />

C#代码如下

using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Widget;
using Android.OS;
using Com.Baidu.Mapapi.Map;
using Com.Baidu.Mapapi;
using Android.Locations;
using Com.Baidu.Mapapi.Model;

namespace BaiduMapDemo
{
[Activity(Label = "BaiduMapDemo", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity, ILocationListener//为安卓定位接口
{
LocationManager locMgr;
MapView mMapView ;
BaiduMap mBaiduMap ;

protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
//初台化地图，注意位置，在SetContentView前
SDKInitializer.Initialize(Application.Context);
SetContentView(Resource.Layout.Main);
mMapView = FindViewById<MapView>(Resource.Id.bmapView);

mBaiduMap = mMapView.Map;
//普通地图
mBaiduMap.MapType = BaiduMap.MapTypeNormal;

}
protected override void OnResume()
{
base.OnResume();

locMgr = GetSystemService(Context.LocationService) as LocationManager;

Criteria locationCriteria = new Criteria();
locationCriteria.Accuracy = Accuracy.Coarse;
locationCriteria.PowerRequirement = Power.Medium;

locationCriteria.AltitudeRequired = false;//海拔
locationCriteria.BearingRequired = false;//方位/方向
locationCriteria.SpeedRequired = false;//速度
locationCriteria.CostAllowed = true;//成本

var locationProvider = locMgr.GetBestProvider(locationCriteria, true);

if (locationProvider != null)
{
locMgr.RequestLocationUpdates(locationProvider, 2000, 1, this);
}
else
{
Toast.MakeText(this, "The Network Provider does not exist or is not enabled!", ToastLength.Long).Show();
}

}
protected override void OnStart()
{
base.OnStart();
}
protected override void OnStop()
{
base.OnStop();
}
protected override void OnPause()
{
base.OnPause();
locMgr.RemoveUpdates(this);
}

/// <summary>
/// 实现ILocationListener中方法，位置改变
/// </summary>
/// <param name="location"></param>
public void OnLocationChanged(Location location)
{
var point = new LatLng(location.Latitude, location.Longitude);
//使地图移动到当前位置
MapStatus mMapStatus = new MapStatus.Builder()
.Target(point)
.Zoom(12)
.Build();

//定义MapStatusUpdate对象，以便描述地图状态将要发生的变化

MapStatusUpdate mMapStatusUpdate = MapStatusUpdateFactory.NewMapStatus(mMapStatus);
//改变地图状态
mBaiduMap.SetMapStatus(mMapStatusUpdate);

//创建当前位置Marker图标
BitmapDescriptor bitmap = BitmapDescriptorFactory
.FromResource(Resource.Drawable.icon_gcoding);
//构建MarkerOption，用于在地图上添加Marker
OverlayOptions option = new MarkerOptions()
.InvokePosition(point)
.InvokeIcon(bitmap);
//在地图上添加Marker，并显示
mBaiduMap.AddOverlay(option);

}
/// <summary>
/// 实现ILocationListener中方法
/// </summary>
/// <param name="provider"></param>
public void OnProviderDisabled(string provider)
{
}
/// <summary>
/// 实现ILocationListener中方法
/// </summary>
/// <param name="provider"></param>
public void OnProviderEnabled(string provider)
{
}
/// <summary>
/// 实现ILocationListener中方法
/// </summary>
/// <param name="provider"></param>
/// <param name="status"></param>
/// <param name="extras"></param>
public void OnStatusChanged(string provider, [GeneratedEnum] Availability status, Bundle extras)
{
}
}
}

本文出自 “桂素伟” 博客，请务必保留此出处http://axzxs.blog.51cto.com/730810/1707541