Question

我正在尝试使用Embarcadero XE5并在Android 4.2.2上运行Galaxy S4的环境传感器。这是我正在使用的代码，但是我收到了访问冲突。你能帮帮我吗？

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, System.Sensors,
  FMX.StdCtrls, FMX.Edit, System.TypInfo;

type
  TForm1 = class(TForm)
    btn1: TSpeedButton;
    lbl1: TLabel;
    procedure btn1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.fmx}



procedure TForm1.btn1Click(Sender: TObject);
var
  LManager : TSensorManager;
  LCustomEnvironmentalSensor     : TCustomEnvironmentalSensor;
  LSensor  : TCustomSensor;
begin
  LManager := TSensorManager.Current;
  LManager.Activate;

  LCustomEnvironmentalSensor:= LSensor as TCustomEnvironmentalSensor;

  lbl1.Text := FloatToStr(LCustomEnvironmentalSensor.Temperature.);
end;

end.

Answer 1

我知道TCustomEnvironmentalSensor只是应用程序代码中传感器实例的一个非初始化类...尝试名为SensorInfo的FireMonkey演示项目中的代码：）

   LSensorArray := TSensorManager.Current.GetSensorsByCategory(ASensorCategory);

   for LSensor in LSensorArray do
   begin
       // do some procedures on the LSensor 
       // from TCustomEnvironmentalSensor class :)
   end

在Embarcadero XE5中访问Android传感器

1 个答案: