Android实例-闪光灯的控制(XE8+小米2)

unit Unit1;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.Media,
  FMX.Controls.Presentation, FMX.StdCtrls;

type
  TForm1 = class(TForm)
    CameraComponent1: TCameraComponent;//闪光灯的控制控件
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.fmx}
{$R *.NmXhdpiPh.fmx ANDROID}

procedure TForm1.Button1Click(Sender: TObject);
begin
  if Button1.Text = '开' then
  begin
    CameraComponent1.TorchMode := TTorchMode.tmModeOn;//开灯
    Button1.Text := '关';
  end
  else
  begin
    CameraComponent1.TorchMode := TTorchMode.tmModeOff;//关灯
    Button1.Text := '开';
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Button1.Enabled := CameraComponent1.HasFlash;//如果没有闪光灯，则按钮不起作用
  CameraComponent1.Active := True;
end;

end.