如何处理App的Application的事件

http://blog.sina.com.cn/s/blog_44fa172f0102vwr2.html

直接上代码，还有条经验就是SetApplicationEventHandler可注册多个事件方法。

unit Unit6;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  FMX.Controls.Presentation, FMX.ScrollBox, FMX.Memo, FMX.Platform;

type
  TForm6 = class(TForm)
    Memo1: TMemo;
    procedure FormCreate(Sender: TObject);
  private
    function HandleAppEvent(AAppEvent: TApplicationEvent;
      AContext: TObject): Boolean;
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form6: TForm6;

implementation

{$R *.fmx}


procedure TForm6.FormCreate(Sender: TObject);
var
  SvcEvents: IFMXApplicationEventService;
begin
  if TPlatformServices.Current.SupportsPlatformService
    (IFMXApplicationEventService, IInterface(SvcEvents))
  then
    SvcEvents.SetApplicationEventHandler(HandleAppEvent);

end;

function TForm6.HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean;
var
  astate: string;
begin
  case AAppEvent of
    TApplicationEvent.FinishedLaunching:
      astate := 'FinishedLaunching';
    TApplicationEvent.BecameActive:
      astate := 'BecameActive';
    TApplicationEvent.WillBecomeInactive:
      astate := 'WillBecomeInactive';
    TApplicationEvent.EnteredBackground:
      astate := 'EnteredBackground';
    TApplicationEvent.WillBecomeForeground:
      astate := 'WillBecomeForeground';
    TApplicationEvent.WillTerminate:
      astate := 'WillTerminate';
    TApplicationEvent.LowMemory:
      astate := 'LowMemory';
    TApplicationEvent.TimeChange:
      astate := 'TimeChange';
    TApplicationEvent.OpenURL:
      astate := 'OpenURL';
  end;
  Self.Memo1.Lines.Add(astate);
  Result := true;
end;

end.

还可以参考下面的例子，是消息的类型

FMX.Platform.TApplicationEvent

FMX.Platform.TApplicationEvent

http://docwiki.embarcadero.com/Libraries/Seattle/en/FMX.Platform.TApplicationEvent

http://docwiki.embarcadero.com/Libraries/Tokyo/en/FMX.Platform.TApplicationEvent

TApplicationEvent = (FinishedLaunching, BecameActive, WillBecomeInactive, EnteredBackground, WillBecomeForeground, WillTerminate, LowMemory, TimeChange, OpenURL);

An instance of TApplicationEvent may have any of the following values:

Item	Description	Platform
		Android	iOS
BecameActive	Your application has gained the focus.//applicationDidBecomeActive	Supported	Supported
EnteredBackground	The user is no longer using your application, but your application is still running in the background.	Supported	Supported
FinishedLaunching	Your application has been launched.	Supported	Supported
LowMemory	This warns your application that the device is running out of memory. Your application should reduce memory usage, freeing structures and data that can be loaded again at a later point.	Supported	Supported
OpenURL	You application has received a request to open an URL. Application events of this type are usually associated with a context. This context is an instance of the iOS-only TiOSOpenApplicationContext class, which provides the following read-only properties: TiOSOpenApplicationContext.SourceApp is a string that contains the bundle ID of the application that requested your application to open the URL. TiOSOpenApplicationContext.URL is the URL to open, either a network resource or a file. TiOSOpenApplicationContext.Context is a pointer to a property-list object that might provide additional information. See the iOS API reference documentation for more information.		Supported
TimeChange	There has been a significant change in time. This event might happen for example when the day changes or when the device changes to or from daylight savings time.		Supported
WillBecomeForeground	The user is now using your application, which was previously in the background.	Supported	Supported
WillBecomeInactive	Your application is going to loose the focus. / applicationWillResignActive	Supported	Supported
WillTerminate	The user is quitting your application.	Supported	Supported

http://codeverge.com/embarcadero.delphi.ios/ifmxapplicationeventservice-not-firing/2028062

http://codeverge.com/embarcadero.delphi.firemonkey/keep-application-on-top/2009583

procedure TMainForm.FormCreate(Sender: TObject); var SvcEvents: IFMXApplicationEventService; begin if TPlatformServices.Current.SupportsPlatformService(IFMXApplicationEventService, IInterface(SvcEvents)) then SvcEvents.SetApplicationEventHandler(HandleAppEvent); Application.OnException := ExceptionHandler; end; function TMainForm.HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean; begin case AAppEvent of TApplicationEvent.FinishedLaunching: ; TApplicationEvent.BecameActive: ; TApplicationEvent.WillBecomeInactive: ; TApplicationEvent.EnteredBackground: ; TApplicationEvent.WillBecomeForeground: ; TApplicationEvent.WillTerminate: ; TApplicationEvent.LowMemory: ; TApplicationEvent.TimeChange: ; TApplicationEvent.OpenURL: ; end; Result := True; end; - See more at: http://codeverge.com/embarcadero.delphi.firemonkey/keep-application-on-top/2009583#sthash.6XM5jEUI.dpuf

procedure TMainForm.FormCreate(Sender: TObject); var SvcEvents: IFMXApplicationEventService; begin if TPlatformServices.Current.SupportsPlatformService(IFMXApplicationEventService, IInterface(SvcEvents)) then SvcEvents.SetApplicationEventHandler(HandleAppEvent); Application.OnException := ExceptionHandler; end; function TMainForm.HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean; begin case AAppEvent of TApplicationEvent.FinishedLaunching: ; TApplicationEvent.BecameActive: ; TApplicationEvent.WillBecomeInactive: ; TApplicationEvent.EnteredBackground: ; TApplicationEvent.WillBecomeForeground: ; TApplicationEvent.WillTerminate: ; TApplicationEvent.LowMemory: ; TApplicationEvent.TimeChange: ; TApplicationEvent.OpenURL: ; end; Result := True; end; - See more at: http://codeverge.com/embarcadero.delphi.firemonkey/keep-application-on-top/2009583#sthash.6XM5jEUI.dpuf

procedure TMainForm.FormCreate(Sender: TObject); var SvcEvents: IFMXApplicationEventService; begin if TPlatformServices.Current.SupportsPlatformService(IFMXApplicationEventService, IInterface(SvcEvents)) then SvcEvents.SetApplicationEventHandler(HandleAppEvent); Application.OnException := ExceptionHandler; end; function TMainForm.HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean; begin case AAppEvent of TApplicationEvent.FinishedLaunching: ; TApplicationEvent.BecameActive: ; TApplicationEvent.WillBecomeInactive: ; TApplicationEvent.EnteredBackground: ; TApplicationEvent.WillBecomeForeground: ; TApplicationEvent.WillTerminate: ; TApplicationEvent.LowMemory: ; TApplicationEvent.TimeChange: ; TApplicationEvent.OpenURL: ; end; Result := True; end; - See more at: http://codeverge.com/embarcadero.delphi.firemonkey/keep-application-on-top/2009583#sthash.6XM5jEUI.dpuf

http://community.embarcadero.com/index.php/blogs/entry/mobile-app-lifecycle-events-handling-in-delphi-xe5-40067

 http://codeverge.com/embarcadero.delphi.firemonkey/keep-application-on-top/2009583

FMX.Platform.pas

procedure TMainForm.FormCreate( Sender : TObject );
  var
    SvcEvents : IFMXApplicationEventService;
begin
    if TPlatformServices.Current.SupportsPlatformService
      ( IFMXApplicationEventService, IInterface( SvcEvents ) )
    then
      SvcEvents.SetApplicationEventHandler( HandleAppEvent );
    Application.OnException := ExceptionHandler;
end;

function TMainForm.HandleAppEvent(   AAppEvent : TApplicationEvent;   AContext  : TObject ) : Boolean;
begin
    case AAppEvent of
      TApplicationEvent.FinishedLaunching :
        ;
      TApplicationEvent.BecameActive :
        ;//第一次运行app触发,从后台切换过来也触发
      TApplicationEvent.WillBecomeInactive :
        ;
      TApplicationEvent.EnteredBackground :
        ;//切换到后台
      TApplicationEvent.WillBecomeForeground :
        ;//从后台切换到前台
      TApplicationEvent.WillTerminate :
        ;
      TApplicationEvent.LowMemory :
        ;
      TApplicationEvent.TimeChange :
        ;
      TApplicationEvent.OpenURL :
        ;
    end;
    Result := True;
end;
//See more at : http://codeverge.com/embarcadero.delphi.firemonkey/keep-application-on-top/2009583

 和IOS的对比

/app启动完毕调用，应用初次启动
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 

//进入后台时调用：一般在这里保存应用数据（数据，比如暂停游戏）
- (void)applicationDidEnterBackground:(UIApplication *)application 

连续点击两次Home按钮
在任务栏点击SpringBoard或者按下Home按钮，单次点击Home按钮

- (void)applicationWillResignActive:(UIApplication *)application

//程序回到时调用，恢复数据
- (void)applicationWillEnterForeground:(UIApplication *)application
//接收内存警告时候调用
- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application
//程序即将退出
- (void)applicationWillTerminate:(UIApplication *)application 

//程序获取焦点，在任务栏中回到app
- (void)applicationDidBecomeActive:(UIApplication *)application

procedure TMainForm.FormCreate(Sender: TObject); var SvcEvents: IFMXApplicationEventService; begin if TPlatformServices.Current.SupportsPlatformService(IFMXApplicationEventService, IInterface(SvcEvents)) then SvcEvents.SetApplicationEventHandler(HandleAppEvent); Application.OnException := ExceptionHandler; end; function TMainForm.HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean; begin case AAppEvent of TApplicationEvent.FinishedLaunching: ; TApplicationEvent.BecameActive: ; TApplicationEvent.WillBecomeInactive: ; TApplicationEvent.EnteredBackground: ; TApplicationEvent.WillBecomeForeground: ; TApplicationEvent.WillTerminate: ; TApplicationEvent.LowMemory: ; TApplicationEvent.TimeChange: ; TApplicationEvent.OpenURL: ; end; Result := True; end; - See more at: http://codeverge.com/embarcadero.delphi.firemonkey/keep-application-on-top/2009583#sthash.6XM5jEUI.dpuf

跟踪的时间触发日志。

FormCreate
FormShow
BecameActive

FormSaveState
EnteredBackgrounbd
WillBecomeForeground

BecameActive

FormSaveState
EnteredBackgrounbd

WillBecomeForeground
BecameActive

FormSaveState
EnteredBackgrounbd

WillBecomeForeground
BecameActive

function TFMXMusicPlayerFrm.HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean;
var
  astate: string;
begin
  case AAppEvent of
    TApplicationEvent.FinishedLaunching:
      astate := 'FinishedLaunching';
    TApplicationEvent.BecameActive:
      astate := 'BecameActive';
    TApplicationEvent.WillBecomeInactive:
      astate := 'WillBecomeInactive';
    TApplicationEvent.EnteredBackground:
      astate := 'EnteredBackground';
    TApplicationEvent.WillBecomeForeground:
      astate := 'WillBecomeForeground';
    TApplicationEvent.WillTerminate:
      astate := 'WillTerminate';
    TApplicationEvent.LowMemory:
      astate := 'LowMemory';
    TApplicationEvent.TimeChange:
      astate := 'TimeChange';
    TApplicationEvent.OpenURL:
      astate := 'OpenURL';
  end;

  Result := true;
end;

FMX.Platform.iOS.pas

Application delegates

  TApplicationDelegate = class{(TOCLocal, UIApplicationDelegate)}
  private
    FMainWindow: TFMXWindow;
  public
    function application(Sender: UIApplication; didFinishLaunchingWithOptions: NSDictionary): Boolean; overload; cdecl;
    procedure application(Sender: UIApplication; didReceiveLocalNotification: UILocalNotification); overload; cdecl;
    procedure application(Sender: UIApplication; didRegisterForRemoteNotificationsWithDeviceToken: NSData); overload; cdecl;
    function application(const openURL, sourceApplication: string; annotation: Pointer): Boolean; overload; cdecl;
    procedure applicationDidBecomeActive(const Sender: UIApplication); cdecl;
    procedure applicationDidEnterBackground(const Sender: UIApplication); cdecl;
    procedure applicationDidRegisterForRemoteNotificationsWithDeviceToken(Sender: UIApplication; AToken: NSData); cdecl;
    procedure applicationDidReceiveRemoteNotification(Sender: UIApplication; ANotification: NSDictionary); cdecl;
    procedure didFailToRegisterForRemoteNotificationsWithError(Sender: UIApplication; AError: NSError); cdecl;
    procedure applicationDidReceiveMemoryWarning(Sender: UIApplication); cdecl;
    procedure applicationSignificantTimeChange(Sender: UIApplication); cdecl;
    procedure applicationWillEnterForeground(Sender: UIApplication); cdecl;
    procedure applicationWillResignActive(Sender: UIApplication); cdecl;
    procedure applicationWillTerminate(Sender: UIApplication); cdecl;
    procedure setWindow(window: UIWindow); cdecl;
    function window: UIWindow; cdecl;
    property MainWindow: TFMXWindow read FMainWindow;
  end;

// Application delegates

function applicationDidFinishLaunchingWithOptions(self: id; _cmd: SEL;
  application: PUIApplication; options: PNSDictionary): Boolean; cdecl;
begin
  Result := PlatformCocoa.FAppDelegate.application(TUIApplication.Wrap(application), TNSDictionary.Wrap(options));
end;

procedure applicationDidReceiveLocalNotification(self: id; _cmd: SEL; application: PUIApplication;
  notification: Pointer); cdecl;
begin
  PlatformCocoa.FAppDelegate.application(TUIApplication.Wrap(application), TUILocalNotification.Wrap(notification));
end;

procedure didReceiveRemoteNotification(self: id; _cmd: SEL; app: PUIApplication; ANotification: PNSDictionary); cdecl;
begin
  PlatformCocoa.FAppDelegate.applicationDidReceiveRemoteNotification(TUIApplication.Wrap(app), TNSDictionary.Wrap(ANotification));
end;

procedure didFailToRegisterForRemoteNotificationsWithError(self: id; _cmd: SEL; app: PUIApplication; error: PNSError); cdecl;
begin
  PlatformCocoa.FAppDelegate.didFailToRegisterForRemoteNotificationsWithError(TUIApplication.Wrap(application), TNSError.Wrap(error));
end;

procedure didRegisterForRemoteNotificationsWithDeviceToken(self: id; _cmd: SEL; application: PUIApplication; deviceToken: PNSData); cdecl;
begin
  PlatformCocoa.FAppDelegate.applicationDidRegisterForRemoteNotificationsWithDeviceToken(TUIApplication.Wrap(application), TNSData.Wrap(deviceToken));
end;

procedure applicationOpenURLWithSourceAnnotation(self: id; _cmd: SEL; application: PUIApplication; url: Pointer; sourceApplication: PNSString; annotation: id);
var
  URLString: string;
  SourceAppString: string;
begin
  if url <> nil then
    URLString := NSStrToStr(TNSURL.Wrap(url).absoluteString)
  else
    URLString := '';
  if sourceApplication <> nil then
    SourceAppString := NSStrToStr(TNSString.Wrap(sourceApplication))
  else
    SourceAppString := '';
  PlatformCocoa.FAppDelegate.application(URLString, SourceAppString, annotation);
end;

procedure applicationDidBecomeActive(self: id; _cmd: SEL; application: PUIApplication); cdecl;
begin
  PlatformCocoa.FAppDelegate.applicationDidBecomeActive(TUIApplication.Wrap(application));
end;

procedure applicationDidEnterBackground(self: id; _cmd: SEL; application: PUIApplication); cdecl;
begin
  PlatformCocoa.FAppDelegate.applicationDidEnterBackground(TUIApplication.Wrap(application));
end;

procedure applicationWillEnterForeground(self: id; _cmd: SEL; application: PUIApplication); cdecl;
begin
  PlatformCocoa.FAppDelegate.applicationWillEnterForeground(TUIApplication.Wrap(application));
end;

procedure applicationWillTerminate(self: id; _cmd: SEL; application: PUIApplication); cdecl;
begin
  PlatformCocoa.FAppDelegate.applicationWillTerminate(TUIApplication.Wrap(application));
end;

procedure applicationDidReceiveMemoryWarning(self: id; _cmd: SEL; application: PUIApplication); cdecl;
begin
  PlatformCocoa.FAppDelegate.applicationDidReceiveMemoryWarning(TUIApplication.Wrap(application));
end;