【Android】3.22 示例22--LBS云检索功能

分类：C#、Android、VS2015、百度地图应用； 创建日期：2016-02-04

简介：介绍如何使用LBS.云检索用户自有数据。

详述：

（1）LBS.云是百度地图针对LBS开发者推出的平台级服务；

（2）提供海量位置数据存储、检索、展示一体化解决方案；

（3）该服务对开发者免费开放；

（4）Demo中放入了测试用ak，开发者若使用自己的数据，请更换为自己的ak；

（5）LBS.云检索使用方法请参考开发指南“LBS云服务”部分；

（6）详细了解LBS.云，欢迎访问：http://developer.baidu.com/map/lbs-cloud.htm

（7）申请ak及管理数据等问题，欢迎访问LBS开放平台官网：http://lbsyun.baidu.com/

一、运行截图

本示例运行截图如下：

二、设计步骤

1、添加demo22_cloud_search.xml文件

在layout文件夹下添加该文件，代码不再列出。

2、添加Demo22CloudSearch.cs文件

在SrcSdkDemos文件夹下添加该文件，然后将代码改为下面的内容：

using Android.App;
using Android.Content;
using Android.OS;
using Android.Widget;
namespace BdMapV371Demos.SrcSdkDemos
{
    [Activity(Label = "@string/title_activity_cloud_search_demo")]
    public class Demo22CloudSearch : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.demo22_cloud_search);
            FindViewById<Button>(Resource.Id.startCloudSearchDemo).Click += delegate
            {
                Intent intent = new Intent();
                intent.SetClass(this, typeof(Demo22CloudSearchActivity));
                StartActivity(intent);
            };
        }
    }
}

3、添加Demo22CloudSearchActivity.cs文件

在SrcSdkDemos文件夹下添加该文件，然后将代码改为下面的内容：

using Android.App;
using Android.Content.PM;
using Android.OS;
using Android.Util;
using Android.Widget;
using Com.Baidu.Mapapi.Cloud;
using Com.Baidu.Mapapi.Map;
using Com.Baidu.Mapapi.Model;
namespace BdMapV371Demos.SrcSdkDemos
{
    [Activity(Label = "@string/demo_name_cloud",
        ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.KeyboardHidden,
        ScreenOrientation = ScreenOrientation.Sensor)]
    public class Demo22CloudSearchActivity : Activity, ICloudListener
    {
        private static readonly string LTAG = nameof(Demo22CloudSearchActivity);
        private TextureMapView mMapView;
        private BaiduMap mBaiduMap;
        protected override void OnCreate(Bundle icicle)
        {
            base.OnCreate(icicle);
            SetContentView(Resource.Layout.demo22_lbssearch);
            CloudManager.Instance.Init(this);
            mMapView = FindViewById<TextureMapView>(Resource.Id.bmapView);
            mBaiduMap = mMapView.Map;
            FindViewById(Resource.Id.regionSearch).Click += delegate
            {
                LocalSearchInfo info = new LocalSearchInfo();
                info.Ak = "B266f735e43ab207ec152deff44fec8b";
                info.GeoTableId = ;
                info.Tags = "";
                info.Q = "天安门";
                info.Region = "北京市";
                CloudManager.Instance.LocalSearch(info);
            };
            FindViewById(Resource.Id.regionSearch).Click += delegate
            {
                LocalSearchInfo info = new LocalSearchInfo();
                info.Ak = "B266f735e43ab207ec152deff44fec8b";
                info.GeoTableId = ;
                info.Tags = "";
                info.Q = "天安门";
                info.Region = "北京市";
                CloudManager.Instance.LocalSearch(info);
            };
            FindViewById(Resource.Id.nearbySearch).Click += delegate
            {
                NearbySearchInfo info = new NearbySearchInfo();
                info.Ak = "D9ace96891048231e8777291cda45ca0";
                info.GeoTableId = ;
                info.Radius = ;
                info.Location = "116.403689,39.914957";
                CloudManager.Instance.NearbySearch(info);
            };
            FindViewById(Resource.Id.boundsSearch).Click += delegate
            {
                BoundSearchInfo info = new BoundSearchInfo();
                info.Ak = "B266f735e43ab207ec152deff44fec8b";
                info.GeoTableId = ;
                info.Q = "天安门";
                info.Bound = "116.401663,39.913961;116.406529,39.917396";
                CloudManager.Instance.BoundSearch(info);
            };
            FindViewById(Resource.Id.detailsSearch).Click += delegate
            {
                DetailSearchInfo info = new DetailSearchInfo();
                info.Ak = "B266f735e43ab207ec152deff44fec8b";
                info.GeoTableId = ;
                info.Uid = ;
                CloudManager.Instance.DetailSearch(info);
            };
        }
        protected override void OnDestroy()
        {
            base.OnDestroy();
            mMapView.OnDestroy();
            CloudManager.Instance.Destroy();
        }
        protected override void OnPause()
        {
            base.OnPause();
            mMapView.OnPause();
        }
        protected override void OnResume()
        {
            base.OnResume();
            mMapView.OnResume();
        }
        public void OnGetDetailSearchResult(DetailSearchResult result, int error)
        {
            if (result != null)
            {
                if (result.PoiInfo != null)
                {
                    Toast.MakeText(this, result.PoiInfo.Title, ToastLength.Short).Show();
                }
                else
                {
                    Toast.MakeText(this, "status:" + result.Status, ToastLength.Short).Show();
                }
            }
        }
        public void OnGetSearchResult(CloudSearchResult result, int error)
        {
            if (result != null && result.PoiList != null && result.PoiList.Count > )
            {
                Log.Debug(LTAG, "onGetSearchResult, result length: " + result.PoiList.Count);
                mBaiduMap.Clear();
                BitmapDescriptor bd = BitmapDescriptorFactory.FromResource(Resource.Drawable.icon_gcoding);
                LatLng ll;
                LatLngBounds.Builder builder = new LatLngBounds.Builder();
                foreach (CloudPoiInfo info in result.PoiList)
                {
                    ll = new LatLng(info.Latitude, info.Longitude);
                    OverlayOptions oo = new MarkerOptions().InvokeIcon(bd).InvokePosition(ll);
                    mBaiduMap.AddOverlay(oo);
                    builder.Include(ll);
                }
                LatLngBounds bounds = builder.Build();
                MapStatusUpdate u = MapStatusUpdateFactory.NewLatLngBounds(bounds);
                mBaiduMap.AnimateMapStatus(u);
            }
        }
    }
}

4、修改MainActivity.cs文件

在MainActivity.cs文件的demos字段定义中，去掉【示例22】下面的注释。

运行观察效果。