RaspBerry PI 树苺派使用 PinToo 开发地图定位 APP |
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RaspBerry PI 树苺派使用 PinToo 开发地图定位 APP
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树莓派实现地图定位 企业在发展过程中需要更精细化的管理，对人员、车辆等可移动物体的位置检测是精细化管理的重要环节。 Raspberry Pi 是创客广泛使用的开发板，仅一张信用卡的大小就能实现强劲的计算。 Raspberry Pi 4 目前可刷写的Android为 LinageOS，官方目前未提供对 Raspberry Pi 的支持，我们可从 https://konstakang.com/devices/rpi4/ 下载社区支持的镜像刷写 Android 系统，PinToo 可在这个系统环境中完美流畅运行。 我们在 Raspberry Pi 4 中运行地图定位的示例。地图定位示例使用 OpenStreetMap 开放地图作为地图基底，这个地图不需要申请 API可直接使用，显示的效果不逊于 Google 地图。 PinToo 内置定位的控件，如需要实现实时定位的功能，需要在系统中授权 PinToo 使用地图定位的权限。获取的地图定位信息可标注于地图中，可配合 Web 图层显示。将地图定位的数据信息存储为数据集，数据集的定位信息经处理可实现路径绘制，图形绘制等高级的功能。
相关代码如下： var ZoomLevel:double; prevPopUp:string; Marker:TTMSFNCMapsMarker; Procedure fxSuperButton1OnClick(Sender: TObject); Begin fxFNCOpenLayers1.AddMarker(25.208768, 121.653944,'' + Self.GetMsgLang('car') + '','https://s1.imagehub.cc/images/2022/08/24/car.png').DataInteger := 0; //fxFNCOpenLayers1.AddMarker(24.212871, 120.670919,'我是小汽車','https://s1.imagehub.cc/images/2022/08/24/car.png').DataInteger := 1; //fxFNCOpenLayers1.AddMarker(24.674813, 121.478387,'我是皮卡車','https://s1.imagehub.cc/images/2022/08/24/car.png').DataInteger := 2; fxFNCOpenLayers1.AddMarker(25.200206, 121.649742,'' + Self.GetMsgLang('cust') + '','https://s1.imagehub.cc/images/2022/08/24/cust.png').DataInteger := 3; fxFNCOpenLayers1.AddMarker(25.199620, 121.675498,'' + Self.GetMsgLang('supply') + '','https://s1.imagehub.cc/images/2022/08/24/supply.png').DataInteger := 4; //fxFNCOpenLayers1.AddMarker(24.202322, 120.711247,'我是儀表','https://s1.imagehub.cc/images/2022/08/24/meter.png').DataInteger := 5; fxFNCOpenLayers1.SetCenterCoordinate(25.199806, 121.649742); ZoomLevel := 14; fxFNCOpenLayers1.SetZoomLevel(ZoomLevel); End; Procedure fxSuperButton2OnClick(Sender: TObject); var s:string; Begin if prevPopUp '' then fxFNCOpenLayers1.ClosePopup(prevPopUp); s :='' + Self.GetMsgLang('rocket') + '' + ''; prevPopUp := fxFNCOpenLayers1.ShowPopup(25.042232, 121.559655,s,-80,50); fxFNCOpenLayers1.SetCenterCoordinate(25.042232, 121.559655); End; Procedure fxSuperButton3OnClick(Sender: TObject); Begin fxFNCOpenLayers1.CloseAllPopups; fxFNCOpenLayers1.ClearMarkers; fxFNCOpenLayers1.Markers.Clear; fxFNCOpenLayers1.Clear; End; procedure AddRecord(ADataSet:TfxRFDataSet;ALatitude,ALongitude:double); begin ADataSet.Append; ADataSet.FieldByName('Latitude').AsFloat := ALatitude; ADataSet.FieldByName('Longitude').AsFloat := ALongitude; ADataSet.Post; End; Procedure fxSuperButton4OnClick(Sender: TObject); var cdsData:TfxRFDataSet; Begin cdsData:=TfxRFDataSet.Create(nil); try { 添加字段 } cdsData.FieldDefs.Add('Latitude',ftFMTBcd,4,false); cdsData.FieldDefs.Add('Longitude',ftFMTBcd,4,false); { 建数据集, 不可缺少的一步 } cdsData.CreateDataSet; AddRecord(cdsData,25.043759, 121.494587); AddRecord(cdsData,25.053090, 121.505574); AddRecord(cdsData,25.064662, 121.506369); AddRecord(cdsData,25.072282, 121.506712); AddRecord(cdsData,25.089073, 121.497614); AddRecord(cdsData,25.094980, 121.490576); fxFNCOpenLayers1.LoadGPXDataSet(cdsData,true,true,3,Orangered,false,false,600); fxFNCOpenLayers1.AddMarker(25.043759, 121.494587,'' + Self.GetMsgLang('start') + '','https://s1.imagehub.cc/images/2022/08/24/location.png'); fxFNCOpenLayers1.AddMarker(25.094980, 121.490576,'' + Self.GetMsgLang('stop') + '','https://s1.imagehub.cc/images/2022/08/24/location.png'); fxFNCOpenLayers1.SetCenterCoordinate(25.043759, 121.494587); ZoomLevel := 12.5; fxFNCOpenLayers1.SetZoomLevel(ZoomLevel); Finally //Except {ErrorMsg / RaiseMsg(Const Error:String)} cdsData.Free; End; End; //回至初始定位位置 Procedure fxSuperButton5OnClick(Sender: TObject); Begin fxFNCOpenLayers1.SetCenterCoordinate(25.042232, 121.559655); ZoomLevel := 14; fxFNCOpenLayers1.SetZoomLevel(ZoomLevel); fxFNCOpenLayers1.AddMarker(25.042232, 121.559655,'','https://s1.imagehub.cc/images/2022/08/24/location.png'); End; Procedure fxSuperButton6OnClick(Sender: TObject); Begin fxFNCOpenLayers1.SetCenterCoordinate(25.042232, 121.559655); ZoomLevel := 14; fxFNCOpenLayers1.SetZoomLevel(ZoomLevel); fxFNCGeocoding1.GetReverseGeocodingResultCoordinate(25.042232, 121.559655,'','',mlmDefault); fxFNCOpenLayers1.AddMarker(25.042232, 121.559655,'','https://s1.imagehub.cc/images/2022/08/24/location.png'); End; Procedure fxRunFrameAfterShow(Sender: TObject); Begin ZoomLevel := fxFNCOpenLayers1.Options.DefaultZoomLevel; End; Procedure fxAMap1OnLocationChangedCallbackEvent(Sender: TObject; ErrorCode: Integer; ErrorInfo: string; LocationDetail: string; LocationType: Integer; Longitude: Double; Latitude: Double; Altitude: Double; Accuracy: Single; Provider: string; Speed: Single; Bearing: Single; Satellites: Integer; Country: string; Province: string; City: string; CityCode: string; District: string; AdCode: string; Address: string; PoiName: string; LocationTime: string; isWifiAble: Boolean; isWifiAbleString: string; GPSStatus: Integer; GPSStatusString: string); Begin if Marker = nil Then Marker := fxFNCOpenLayers1.AddMarker(Latitude,Longitude,Self.GetMsgLang('altitude') + floattostr(Altitude)+'m '+formatdatetime('c',now())+'','https://s1.imagehub.cc/images/2022/08/24/location.png'); begin Marker.Release; Marker.Latitude := Latitude; Marker.Longitude := Longitude; Marker.Title := Self.GetMsgLang('altitude') +floattostr(Altitude)+'m '+formatdatetime('c',now())+''; End; fxFNCGeocoding1.GetReverseGeocodingResultCoordinate(Latitude,Longitude,'','',mlmDefault); End; Procedure fxRunFrameAfterScriptRun(Sender: TObject); Begin fxAMap1.StartLocation; End; Procedure fxFNCGeocoding1OnGetReverseGeocodingResult(Sender: TObject; AResult: TTMSFNCGeocodingRequest); Begin if AResult.Items.Count > 0 then LabelLocation.Text := AResult.Items[0].Address; End; Procedure fxSuperButton7OnClick(Sender: TObject); Begin ZoomLevel := ZoomLevel + 0.5; fxFNCOpenLayers1.SetZoomLevel(ZoomLevel); End; Procedure fxSuperButton8OnClick(Sender: TObject); Begin ZoomLevel := ZoomLevel - 0.5; fxFNCOpenLayers1.SetZoomLevel(ZoomLevel); End; Begin End. |
将PinToo 安装于 Android 车载终端或手机终端，使用范例可实现实时定位的功能。【本文地址】