「バックボタンで終了させない」
バックボタンで終了させない
回答
ソース
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.Layouts, FMX.Memo, System.Math.Vectors, FMX.Types3D,
FMX.StdCtrls, FMX.Controls3D, FMX.MaterialSources, FMX.Objects3D,
FMX.Viewport3D
,FMX.Platform//TPlatformService
,FMX.VirtualKeyboard //IFMXVirtualKeyboardService
,FMX.Platform.Android //MainActivity
;
type
TForm2 = class(TForm)
Memo1: TMemo;
Viewport3D1: TViewport3D;
Model3D1: TModel3D;
Model3D1Mat01: TLightMaterialSource;
Model3D2: TModel3D;
Model3D2Mat01: TLightMaterialSource;
Light1: TLight;
Dummy1: TDummy;
Button1: TButton;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure FormKeyUp(Sender: TObject; var Key: Word; var KeyChar: Char;
Shift: TShiftState);
private
{ private 宣言 }
public
{ public 宣言 }
function HandleAppEvent(AAppEvent:TApplicationEvent;AContext:TObject):boolean;
procedure Log(s:String);
end;
var
Form2: TForm2;
implementation
{$R *.fmx}
procedure TForm2.Log(s: string);
begin
Memo1.Lines.Add(TimeToStr(Now) + ': ' + s);
end;
procedure TForm2.Button1Click(Sender: TObject);
begin
Dummy1.AnimateFloat('RotationAngle.Y',360,2);
end;
procedure TForm2.FormCreate(Sender: TObject);
var
AppEventService:IFMXApplicationEventService;
begin
//Viewport3D1.Visible:=True;
//IInterface(AppEventService)
if
TPlatformServices.Current.SupportsPlatformService(
IFMXApplicationEventService
)
then
begin
try
AppEventService:=
IFMXApplicationEventService(
TPlatformServices.Current.GetPlatformService(
IFMXApplicationEventService
)
);
except
AppEventService:=nil;
end;
//AVD（仮想環境）でデバッグモードで下記を実行すると、非アクティブ時等に落ちる
//iOSでもAndroidでもちゃんと動くらしい
//当然Windowsの場合は以下が実行されない
if AppEventService<>nil then
AppEventService.SetApplicationEventHandler(HandleAppEvent);
end
else
begin
//Windowsの場合は以下が表示される
Log('Application Event Service is not supported.');
end;
end;
procedure TForm2.FormKeyUp(Sender: TObject; var Key: Word; var KeyChar: Char;
Shift: TShiftState);
var Keyboard:IFMXVirtualKeyboardService;
begin
//Androidのbackキーを処理する
if Key=vkHardwareBack then
begin
keyboard:=TPlatformServices.Current.GetPlatformService(
IFMXVirtualKeyboardService
) as IFMXVirtualKeyboardService;
if TVirtualKeyboardState.Visible in keyboard.VirtualKeyboardState then
exit;
MainActivity.moveTaskToBack(True);
Key:=0;
end;
end;
function TForm2.HandleAppEvent(AAppEvent: TApplicationEvent;
AContext: TObject): boolean;
begin
{
Finished Launching
Become Active
Entered Background
Will Become Inactive
Will Become Inactive
Will Become Foreground
Became Active
}
case AAppEvent of
TApplicationEvent.FinishedLaunching:
begin
//起動完了
Log('Finished Launching');
end;
TApplicationEvent.BecameActive:
begin
//フォーカスを取得-------------------------------------
Log('Became Active');
Viewport3D1.Visible:=True;
end;
TApplicationEvent.WillBecomeInactive:
begin
//フォーカス喪失-------------------------------------
Log('Will Become Inactive');
Viewport3D1.Visible:=False;
end;
TApplicationEvent.EnteredBackground:
begin
//裏に回った
//Log('Entered Background');
//Viewport3D1.Visible:=False;
end;
TApplicationEvent.WillBecomeForeground:
begin
//表に回った
Log('Will Become Foreground');
end;
TApplicationEvent.WillTerminate:
begin
//終了しようとしている
Log('Will Terminate');
end;
TApplicationEvent.LowMemory:
begin
//メモリが少ない
//Log('Low Memory');
end;
TApplicationEvent.TimeChange:
begin
//iOSのみ時刻が変わった（日が変わったり夏時間などで）
//Log('Time Change');
end;
TApplicationEvent.OpenURL:
begin
//iOSのみURLを開いた
//Log('Open URL');
end;
end;
Result := True;
{
//Androidの場合。IOSは違う。Delphiはこれらを吸収して上記のようになっているらしい
onCreate ⇒onStart
onRestart ⇒onStart
onStart ⇒onResume or onStop
onResume ⇒onPause
onPause ⇒onResume or onStop
onStop ⇒onRestart or onDestroy
onDestroy
}
end;
end.