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使用C++ Builder XE5获取Sensor值之Light Sensor

2024-07-08 13:27:24   234人阅读

献上代码C++代码，仅供参考。若使用Delphi，请参考文献，http://blogs.embarcadero.com/davidi/2013/12/02/43032/

一定记得要安装FireMonkey哦。否则没有Fmx的库文件在里面。

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
TSensorArray   sa;
TCustomLightSensor *myLightSensor;

//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{

	TSensorManager::Current->Activate();
	int count;
	int i;

	count = TSensorManager::Current->Count;
	Memo1->Clear();
	for (i=0; i <count; i++) {
		Memo1->Lines->Add(TSensorManager::Current->Sensors[i]->Name);
	}

	sa  = TSensorManager::Current->GetSensorsByCategory(TSensorCategory::Light);
	if (sa.Length!=0) {
		myLightSensor = static_cast<TCustomLightSensor*>(sa[0]);
		Label1->Caption = FloatToStr(myLightSensor->Lux);
	}
//    Label1->Caption = ls->Lux;


}
//---------------------------------------------------------------------------
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
	if (sa.Length !=0){
		Label1->Caption = FloatToStr(myLightSensor->Lux);
	}
}
//---------------------------------------------------------------------------

头文件

//---------------------------------------------------------------------------

#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <System.Classes.hpp>
#include <Vcl.Controls.hpp>
#include <Vcl.StdCtrls.hpp>
#include <Vcl.Forms.hpp>
#include <Vcl.ExtCtrls.hpp>
#include <Fmx.Sensors.hpp>

//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:	// IDE-managed Components
	TMemo *Memo1;
	TLabel *Label1;
	Vcl::Extctrls::TTimer *Timer1;
	void __fastcall FormCreate(TObject *Sender);
	void __fastcall Timer1Timer(TObject *Sender);
private:	// User declarations
public:		// User declarations
	__fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif


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