【Android】3.17 示例17--周边雷达功能
分类:C#、Android、VS2015、百度地图应用; 创建日期:2016-02-04
一、简介
周边雷达功能同步支持Android和iOS端。它本质是一个连接百度LBS开放平台前端SDK产品和后端LBS云的中间服务。开发者利用周边雷达功能,可以便捷的在自己的应用内,帮助用户实现查找周边跟“我”使用同样一款App的人这样一个功能。或者说,利用周边雷达功能,开发者可在App内低成本、快速实现查找周边使用相同App的用户位置。
1、周边雷达功能的典型使用场景
(1)查看周边都有谁跟“我”使用同一个App,分布在哪里?
(2)查看周边用户在听什么歌、看什么文章、有什么新动态?
(3)查看周边有什么最新发生的新闻、资讯?
2、使用周边雷达功能的流程
使用周边雷达功能的流程如下:
第一步、注册周边雷达
在使用周边雷达功能之前,需要对应用的密钥(Key)做相应的注册操作。周边雷达支持应用位置信息上传,及一个或多个应用之间实现相互的位置信息查看功能。
第二步、集成SDK
周边雷达是地图SDK产品的一个功能模块,需要使用周边雷达功能的开发者,需在官网下载包含周边雷达功能的地图SDK,并将其集成到自己的开发环境中即可。
具体SDK集成方式请参考《开发指南 – 配置环境及发布》章节的介绍。
第三步、开发
完成周边雷达注册和SDK集成后,即可开始具体功能的开发工作。
具体使用方法请参考后文的详细介绍及官方Demo示例。
二、运行截图
简介:介绍如果使用周边雷达功能上传位置、检索周边的人
详述:
(1)获取位置信息并单次上传服务端;
(2)获取位置信息连续上传服务端;
(3)检索周边用户的位置;
(4)用列表的形式及地图的形式展示周边用户的位置等信息;
注意:需要把应用的key在官网的雷达注册页面进行相关的注册才能使用!
注册网址:http://developer.baidu.com/map/index.php?title=radar
本示例运行截图如下:
三、设计步骤
1、在雷达注册页面中注册key
进入官网的雷达注册页面,用原来申请的key注册雷达定位服务。
2、添加demo17_radarlist.xml文件
在layout文件夹下添加该文件,然后将代码改为下面的内容:
(略)
3、添加demo17_radarmap.xml文件
在layout文件夹下添加该文件,然后将代码改为下面的内容:
(略)
4、添加demo17_radartablayout.xml文件
在layout文件夹下添加该文件,然后将代码改为下面的内容:
(略)
5、添加Demo17CustomViewPager.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.Support.V4.View;
using Android.Util;
using Android.Views;
namespace BdMapV371Demos.SrcSdkDemos
{
[Activity(Label = "@string/demo_name_share")]
public class Demo17CustomViewPager : ViewPager
{
private bool isCanScroll = false;
public Demo17CustomViewPager(Context context) : base(context)
{ } public Demo17CustomViewPager(Context context, IAttributeSet attrs)
: base(context, attrs)
{ } public void SetScanScroll(bool isCanScroll)
{
this.isCanScroll = isCanScroll;
} public override void ScrollTo(int x, int y)
{
base.ScrollTo(x, y);
} public override void SetCurrentItem(int item, bool smoothScroll)
{
base.SetCurrentItem(item, smoothScroll);
} public override bool OnTouchEvent(MotionEvent e)
{
if (isCanScroll)
{
return base.OnTouchEvent(e);
}
else
{
return false;
}
} public override bool OnInterceptTouchEvent(MotionEvent ev)
{
if (isCanScroll)
{
return base.OnInterceptTouchEvent(ev);
}
else {
return false;
}
}
}
}
6、添加Demo17Radar.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.Text;
using Android.Views;
using Android.Widget;
using Android.Graphics;
using Com.Baidu.Location;
using Com.Baidu.Mapapi.Map;
using Com.Baidu.Mapapi.Model;
using Com.Baidu.Mapapi.Radar;
using Android.Support.V4.View;
using System.Collections.Generic; namespace BdMapV371Demos.SrcSdkDemos
{
/// <summary>
/// 演示周边雷达的业务场景使用
/// </summary>
[Activity(Label = "@string/demo_name_radar",
ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.KeyboardHidden,
ScreenOrientation = ScreenOrientation.Sensor)]
public class Demo17Radar : Activity,
IRadarUploadInfoCallback,
IRadarSearchListener,
IBDLocationListener
{
#region 界面空间相关
private Demo17CustomViewPager mPager;//自定义viewPager,目的是禁用手势滑动
private List<View> listViews;
private TabHost mTabHost;
private EditText userId;
private EditText userDes;
private Button uploadOnece;
private Button uploadContinue;
private Button stopUpload;
private Button switchBtn;
private Button searchNearbyBtn;
private Button clearRstBtn;
private Button clearInfoBtn;
private int index = ;
private Button listPreBtn;
private Button listNextBtn;
private TextView listCurPage;
private Button mapPreBtn;
private Button mapNextBtn;
private TextView mapCurPage;
#endregion #region 定位相关
LocationClient mLocClient;
private int pageIndex = ;
private int curPage = ;
private int totalPage = ;
private LatLng pt = null;
#endregion #region 周边雷达相关
RadarNearbyResult listResult = null;
ListView mResultListView = null;
RadarResultListAdapter mResultListAdapter = null;
private string userID = "";
private string userComment = "";
private bool uploadAuto = false;
#endregion #region 地图相关
private TextureMapView mMapView;
private BaiduMap mBaiduMap;
private TextView popupText = null;//泡泡view
BitmapDescriptor ff3 = BitmapDescriptorFactory.FromResource(Resource.Drawable.icon_marka);
#endregion protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.demo17_radartablayout); //初始化UI和地图
InitUI(); //周边雷达设置监听
RadarSearchManager.Instance.AddNearbyInfoListener(this);
//周边雷达设置用户,id为空默认是设备标识
RadarSearchManager.Instance.SetUserID(userID); // 定位初始化
mLocClient = new LocationClient(this);
mLocClient.RegisterLocationListener(this);
LocationClientOption option = new LocationClientOption();
option.OpenGps = false; // 是否打开gps
option.CoorType = "bd09ll"; // 设置坐标类型
option.ScanSpan = ;
mLocClient.LocOption = option;
mLocClient.Start();
} private void InitUI()
{
mTabHost = FindViewById<TabHost>(Resource.Id.tabhost);
mTabHost.Setup();
mTabHost.AddTab(mTabHost.NewTabSpec("tabUpload")
.SetIndicator(ComposeLayout("上传位置", ))
.SetContent(Resource.Id.tabUpload));
mTabHost.AddTab(mTabHost.NewTabSpec("tabGet")
.SetIndicator(ComposeLayout("检索周边", ))
.SetContent(Resource.Id.tabGet));
mTabHost.CurrentTab = ;
mTabHost.TabChanged += (s, e) =>
{
mTabHost.TabWidget.GetChildAt(mTabHost.CurrentTab).SetBackgroundColor(Color.ParseColor("#B0E2FF"));
}; mPager = FindViewById<Demo17CustomViewPager>(Resource.Id.viewpager);
listViews = new List<View>();
View layout = LayoutInflater.Inflate(Resource.Layout.demo17_radarlist, null);
View mapLayout = LayoutInflater.Inflate(Resource.Layout.demo17_radarmap, null);
//地图初始化
mMapView = mapLayout.FindViewById<TextureMapView>(Resource.Id.map);
mBaiduMap = mMapView.Map;
mBaiduMap.MarkerClick += (s, e) =>
{
var marker = e.P0;
mBaiduMap.HideInfoWindow();
if (marker != null)
{
popupText = new TextView(this);
popupText.SetBackgroundResource(Resource.Drawable.popup);
popupText.SetTextColor(Color.ParseColor("0xFF000000"));
popupText.Text = marker.ExtraInfo.GetString("des");
mBaiduMap.ShowInfoWindow(new InfoWindow(popupText, marker.Position, -));
MapStatusUpdate update = MapStatusUpdateFactory.NewLatLng(marker.Position);
mBaiduMap.SetMapStatus(update);
}
};
mBaiduMap.MapClick += (s, e) =>
{
mBaiduMap.HideInfoWindow();
};
mBaiduMap.MyLocationEnabled = true;
listViews.Add(layout);
listViews.Add(mapLayout);
mPager.Adapter = new MyPagerAdapter(listViews);
mPager.CurrentItem = ;
mPager.PageSelected += (s, e) =>
{
if (e.Position == ) //切换为列表
{
index = ;
switchBtn.Text = "地图";
}
else //切换为地图
{
index = ;
switchBtn.Text = "列表";
}
}; userId = FindViewById<EditText>(Resource.Id.id);
userDes = FindViewById<EditText>(Resource.Id.des);
//用户ID和用户描述文本框变化时引发的事件
userId.TextChanged += User_TextChanged;
userDes.TextChanged += User_TextChanged; //【检索周边】按钮
searchNearbyBtn = FindViewById<Button>(Resource.Id.searchNearByButton);
searchNearbyBtn.Click += delegate
{
//查找周边的人
if (pt == null)
{
Toast.MakeText(this, "未获取到位置", ToastLength.Long).Show();
return;
}
pageIndex = ;
SearchRequest(pageIndex);
}; //【清除结果】按钮
clearRstBtn = FindViewById<Button>(Resource.Id.clearResultButton);
clearRstBtn.Click += delegate
{
//清除查找结果
ParseResultToList(null);
ParseResultToMap(null);
clearRstBtn.Enabled = false;
listPreBtn.Visibility = ViewStates.Invisible;
listNextBtn.Visibility = ViewStates.Invisible;
mapPreBtn.Visibility = ViewStates.Invisible;
mapNextBtn.Visibility = ViewStates.Invisible;
listCurPage.Visibility = ViewStates.Invisible;
mapCurPage.Visibility = ViewStates.Invisible;
mBaiduMap.HideInfoWindow();
}; //【地图】按钮
switchBtn = FindViewById<Button>(Resource.Id.switchButton);
switchBtn.Click += delegate
{
//viewPager切换
if (index == )
{
//切换为地图
index = ;
switchBtn.Text = "列表";
}
else {
//切换为列表
index = ;
switchBtn.Text = "地图";
}
mPager.CurrentItem = index;
}; //【获取当前位置并上传】按钮
uploadOnece = FindViewById<Button>(Resource.Id.uploadonece);
uploadOnece.Click += delegate
{
//上传一次位置
if (pt == null)
{
Toast.MakeText(this, "未获取到位置", ToastLength.Long).Show();
return;
}
RadarUploadInfo info = new RadarUploadInfo();
info.Comments = userComment;
info.Pt = pt;
RadarSearchManager.Instance.UploadInfoRequest(info);
clearInfoBtn.Enabled = true;
}; //【连续获取位置并上传】按钮
uploadContinue = FindViewById<Button>(Resource.Id.uploadcontinue);
uploadContinue.Click += delegate
{
//开始自动上传
if (pt == null)
{
Toast.MakeText(this, "未获取到位置", ToastLength.Long).Show();
return;
}
uploadAuto = true;
RadarSearchManager.Instance.StartUploadAuto(this, );
uploadContinue.Enabled = false;
stopUpload.Enabled = true;
clearInfoBtn.Enabled = true;
}; //【停止上传】按钮
stopUpload = FindViewById<Button>(Resource.Id.stopupload);
stopUpload.Click += delegate
{
//停止自动上传
uploadAuto = false;
RadarSearchManager.Instance.StopUploadAuto();
stopUpload.Enabled = false;
uploadContinue.Enabled = true;
}; //【清除当前信息】按钮
clearInfoBtn = FindViewById<Button>(Resource.Id.clearInfoButton);
clearInfoBtn.Click += delegate
{
//清除自己当前的信息
RadarSearchManager.Instance.ClearUserInfo();
}; //--------layout--demo17_radarlist.xml----------------
//【上一页】按钮
listPreBtn = layout.FindViewById<Button>(Resource.Id.radarlistpre);
listPreBtn.Click += delegate
{
if (pageIndex < ) return;
pageIndex--;
SearchRequest(pageIndex);
}; //【下一页】按钮
listNextBtn = layout.FindViewById<Button>(Resource.Id.radarlistnext);
listNextBtn.Click += delegate
{
if (pageIndex >= totalPage - ) return;
pageIndex++;
SearchRequest(pageIndex);
}; listCurPage = layout.FindViewById<TextView>(Resource.Id.radarListPage);
mapPreBtn = mapLayout.FindViewById<Button>(Resource.Id.radarmappre);
mapNextBtn = mapLayout.FindViewById<Button>(Resource.Id.radarmapnext);
mapCurPage = mapLayout.FindViewById<TextView>(Resource.Id.radarMapPage); uploadContinue.Enabled = true;
stopUpload.Enabled = false;
clearRstBtn.Enabled = false;
clearInfoBtn.Enabled = false;
listPreBtn.Visibility = ViewStates.Invisible;
listNextBtn.Visibility = ViewStates.Invisible;
mapPreBtn.Visibility = ViewStates.Invisible;
mapNextBtn.Visibility = ViewStates.Invisible;
listCurPage.Visibility = ViewStates.Invisible;
mapCurPage.Visibility = ViewStates.Invisible; mTabHost.TabWidget.GetChildAt().SetBackgroundColor(Color.DarkGray);
List<RadarNearbyInfo> infos = new List<RadarNearbyInfo>();
mResultListAdapter = new RadarResultListAdapter(this, infos);
mResultListView = layout.FindViewById<ListView>(Resource.Id.radar_list);
mResultListView.Adapter = mResultListAdapter;
mResultListAdapter.NotifyDataSetChanged();
} private void User_TextChanged(object sender, TextChangedEventArgs e)
{
userID = userId.Text;
userComment = userDes.Text;
RadarSearchManager.Instance.SetUserID(userID);
} private void SearchRequest(int index)
{
curPage = ;
totalPage = ; RadarNearbySearchOption option = new RadarNearbySearchOption()
.CenterPt(pt).PageNum(pageIndex).Radius();
RadarSearchManager.Instance.NearbyInfoRequest(option); listPreBtn.Visibility = ViewStates.Invisible;
listNextBtn.Visibility = ViewStates.Invisible;
mapPreBtn.Visibility = ViewStates.Invisible;
mapNextBtn.Visibility = ViewStates.Invisible;
listCurPage.Text = "0/0";
mapCurPage.Text = "0/0";
mBaiduMap.HideInfoWindow();
} /// <summary>
/// 更新结果列表
/// </summary>
/// <param name="res"></param>
public void ParseResultToList(RadarNearbyResult res)
{
if (res == null)
{
if (mResultListAdapter.list != null)
{
mResultListAdapter.list.Clear();
mResultListAdapter.NotifyDataSetChanged();
} }
else
{
mResultListAdapter.list.Clear();
foreach (RadarNearbyInfo v in res.InfoList)
{
mResultListAdapter.list.Add(v);
}
mResultListAdapter.NotifyDataSetChanged();
if (curPage > )
{
listPreBtn.Visibility = ViewStates.Visible;
}
if (totalPage - > curPage)
{
listNextBtn.Visibility = ViewStates.Visible;
}
if (totalPage > )
{
listCurPage.Visibility = ViewStates.Visible;
listCurPage.Text = string.Format("{0}/{1}", curPage + , totalPage);
}
}
} /// <summary>
///更新结果地图
/// </summary>
/// <param name="res"></param>
public void ParseResultToMap(RadarNearbyResult res)
{
mBaiduMap.Clear();
if (res != null && res.InfoList != null && res.InfoList.Count > )
{
List<RadarNearbyInfo> v = new List<RadarNearbyInfo>();
foreach (RadarNearbyInfo item in res.InfoList)
{
v.Add(item);
}
for (int i = ; i < v.Count; i++)
{
MarkerOptions option = new MarkerOptions()
.InvokeIcon(ff3)
.InvokePosition(v[i].Pt);
Bundle des = new Bundle();
if (v[i].Comments == null || v[i].Comments == "")
{
des.PutString("des", "没有备注");
}
else {
des.PutString("des", v[i].Comments);
}
option.InvokeExtraInfo(des);
mBaiduMap.AddOverlay(option);
}
}
if (curPage > )
{
mapPreBtn.Visibility = ViewStates.Visible;
}
if (totalPage - > curPage)
{
mapNextBtn.Visibility = ViewStates.Visible;
}
if (totalPage > )
{
mapCurPage.Visibility = ViewStates.Visible;
mapCurPage.Text = string.Format("{0}/{1}", curPage + , totalPage);
}
} /// <summary>
/// IRadarUploadInfoCallback要求实现的接口
/// 实现上传callback,自动上传
/// </summary>
/// <returns></returns>
public RadarUploadInfo OnUploadInfoCallback()
{
RadarUploadInfo info = new RadarUploadInfo();
info.Comments = userComment;
info.Pt = pt;
Log.Debug("hjtest", "OnUploadInfoCallback");
return info;
} #region 实现IRadarSearchListener接口
public void OnGetClearInfoState(RadarSearchError p0)
{
var error = p0;
if (error == RadarSearchError.RadarNoError)
{
Toast.MakeText(this, "清除位置成功", ToastLength.Long).Show();
}
else {
Toast.MakeText(this, "清除位置失败", ToastLength.Long).Show();
}
} public void OnGetNearbyInfoList(RadarNearbyResult p0, RadarSearchError p1)
{
RadarNearbyResult result = p0;
RadarSearchError error = p1;
if (error == RadarSearchError.RadarNoError)
{
Toast.MakeText(this, "查询周边成功", ToastLength.Long).Show();
//获取成功
listResult = result;
curPage = result.PageIndex;
totalPage = result.PageNum;
//处理数据
ParseResultToList(listResult);
ParseResultToMap(listResult);
clearRstBtn.Enabled = true;
}
else {
//获取失败
curPage = ;
totalPage = ;
Toast.MakeText(this, "查询周边失败", ToastLength.Long).Show();
}
} public void OnGetUploadState(RadarSearchError p0)
{
RadarSearchError error = p0;
if (error == RadarSearchError.RadarNoError)
{
//上传成功
if (!uploadAuto)
{
Toast.MakeText(this, "单次上传位置成功", ToastLength.Long).Show();
}
}
else {
//上传失败
if (!uploadAuto)
{
Toast.MakeText(this, "单次上传位置失败", ToastLength.Long).Show();
}
}
}
#endregion protected override void OnPause()
{
mMapView.OnPause();
base.OnPause();
} protected override void OnResume()
{
mMapView.OnResume();
base.OnResume();
mTabHost.TabWidget.GetChildAt().SetBackgroundColor(Color.ParseColor("#B0E2FF"));
} protected override void OnDestroy()
{
// 退出时销毁定位
mLocClient.Stop();
//释放周边雷达相关
RadarSearchManager.Instance.RemoveNearbyInfoListener(this);
RadarSearchManager.Instance.ClearUserInfo();
RadarSearchManager.Instance.Destroy();
//释放地图
ff3.Recycle();
mMapView.OnDestroy();
mBaiduMap = null;
base.OnDestroy();
} //定位SDK回调
public void OnReceiveLocation(BDLocation arg0)
{
if (arg0 == null || mBaiduMap == null)
return;
pt = new LatLng(arg0.Latitude, arg0.Longitude);
MyLocationData locData = new MyLocationData.Builder()
.Accuracy(arg0.Radius)
// 此处设置开发者获取到的方向信息,顺时针0-360
.Direction().Latitude(arg0.Latitude)
.Longitude(arg0.Longitude).Build();
if (mBaiduMap != null)
{
mBaiduMap.SetMyLocationData(locData);
}
} /// <summary>
/// ViewPager适配器
/// </summary>
public class MyPagerAdapter : PagerAdapter
{
public IList<View> mListViews; public MyPagerAdapter(IList<View> mListViews)
{
this.mListViews = mListViews;
} public override int Count
{
get
{
return mListViews.Count;
}
} public override void DestroyItem(View container, int position, Java.Lang.Object objectValue)
{
((ViewPager)container).RemoveView(mListViews[position]);
base.DestroyItem(container, position, objectValue);
} public override Java.Lang.Object InstantiateItem(View container, int position)
{
((ViewPager)container).AddView(mListViews[position], );
return mListViews[position];
} public override bool IsViewFromObject(View view, Java.Lang.Object objectValue)
{
return view == objectValue;
} public override IParcelable SaveState()
{
return null;
}
} /// <summary>
/// 结果列表listview适配器
/// </summary>
private class RadarResultListAdapter : BaseAdapter
{
private Demo17Radar demo17Radar;
public List<RadarNearbyInfo> list; public RadarResultListAdapter(Demo17Radar radar, List<RadarNearbyInfo> res) : base()
{
demo17Radar = radar;
list = res;
} public override int Count
{
get
{
if (list == null || (list != null && list.Count < ))
{
return ;
}
else
{
return list.Count;
}
}
} public override View GetView(int position, View convertView, ViewGroup parent)
{
convertView = View.Inflate(demo17Radar, Resource.Layout.demo_info_item, null);
TextView title = convertView.FindViewById<TextView>(Resource.Id.title);
TextView desc = convertView.FindViewById<TextView>(Resource.Id.desc);
title.SetTextColor(Color.ParseColor("#0000FF"));
desc.SetTextColor(Color.ParseColor("#0000FF"));
if (list == null || list.Count == || position >= list.Count)
{
desc.Text = "";
title.Text = "";
}
else
{
if (list[position].Comments == null || list[position].Comments == "")
{
desc.Text = string.Format("{0}米_没有备注", list[position].Distance);
}
else {
desc.Text = string.Format("{0}米_{1}",
list[position].Distance, list[position].Comments);
}
title.Text = list[position].UserID;
}
return convertView;
} public override Java.Lang.Object GetItem(int index)
{
if (list == null)
{
return new RadarNearbyInfo();
}
else {
return list[index];
}
} public override long GetItemId(int id)
{
return id;
}
} public View ComposeLayout(string s, int i)
{
LinearLayout layout = new LinearLayout(this);
layout.Orientation = Orientation.Vertical;
ImageView iv = new ImageView(this);
iv.SetImageResource(i);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.MatchParent,
ViewGroup.LayoutParams.WrapContent);
lp.SetMargins(, , , );
layout.AddView(iv, lp); TextView tv = new TextView(this);
tv.Gravity = GravityFlags.Center;
tv.SetSingleLine(true);
tv.Text = s;
tv.SetTextColor(Color.ParseColor("#0000FF"));
tv.TextSize = ;
layout.AddView(tv, new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.MatchParent,
ViewGroup.LayoutParams.MatchParent));
return layout;
}
}
}
7、修改MainActivity.cs
在MainActivity.cs文件的demos字段定义中,去掉【示例17】下面的注释。
运行观察结果。
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