Android实例-闪光灯的控制(XE8+小米2)

 1 unit Unit1;
 2 
 3 interface
 4 
 5 uses
 6   System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
 7   FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.Media,
 8   FMX.Controls.Presentation, FMX.StdCtrls;
 9 
10 type
11   TForm1 = class(TForm)
12     CameraComponent1: TCameraComponent;//闪光灯的控制控件
13     Button1: TButton;
14     procedure FormCreate(Sender: TObject);
15     procedure Button1Click(Sender: TObject);
16   private
17     { Private declarations }
18   public
19     { Public declarations }
20   end;
21 
22 var
23   Form1: TForm1;
24 
25 implementation
26 
27 {$R *.fmx}
28 {$R *.NmXhdpiPh.fmx ANDROID}
29 
30 procedure TForm1.Button1Click(Sender: TObject);
31 begin
32   if Button1.Text = ‘开‘ then
33   begin
34     CameraComponent1.TorchMode := TTorchMode.tmModeOn;//开灯
35     Button1.Text := ‘关‘;
36   end
37   else
38   begin
39     CameraComponent1.TorchMode := TTorchMode.tmModeOff;//关灯
40     Button1.Text := ‘开‘;
41   end;
42 end;
43 
44 procedure TForm1.FormCreate(Sender: TObject);
45 begin
46   Button1.Enabled := CameraComponent1.HasFlash;//如果没有闪光灯，则按钮不起作用
47   CameraComponent1.Active := True;
48 end;
49 
50 end.