xe6 android 使用距离传感器(Proximiry)
16lz
2021-01-26
The first step it's a run sample from RAD Studio that named SensorInfo on your device. On the tab Biometric you can see HumanProximity. If it's true you can get access to this sensor using RTL.
Add unit System.Sensors into uses list and drop TTimer
type TForm1 = class(TForm) Label1: TLabel; Timer1: TTimer; procedure FormCreate(Sender: TObject); procedure Timer1Timer(Sender: TObject); private FHumanProximity: TCustomBiometricSensor; // Declare it { Private declarations } public { Public declarations } end;var Form1: TForm1;implementation{$R *.fmx}procedure TForm1.FormCreate(Sender: TObject);var LSensorArray : TSensorArray; LSensor : TCustomSensor;begin // Get the sensor list and find that we want TSensorManager.Current.Activate(); LSensorArray := TSensorManager.Current.GetSensorsByCategory(TSensorCategory.Biometric); for LSensor in LSensorArray do if TCustomBiometricSensor(LSensor).SensorType = TBiometricSensorType.HumanProximity then FHumanProximity := TCustomBiometricSensor(LSensor);end;procedure TForm1.Timer1Timer(Sender: TObject);begin // just poll it if FHumanProximity <> nil then Label1.Text := FHumanProximity.HumanProximity.ToString;end;end.
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