如何在 iOS 和 Android 上获取应用恢复状态?

How to get app resume state on iOS and Android?

当应用程序在 iOSAndroid[ 上恢复时,是否可以从代码的角度检查某些内容=18=]?

例如当应用程序最小化并恢复时(应用程序仍 运行 在设备后台)。

在iOS中您可以在

中添加标志
applicationDidEnterBackground

在appDelegate中知道用户是否进入后台,

applicationDidBecomeActive

知道用户 returns 从后台访问应用程序

您需要使用 IFMXApplicationEventService 注册回调,应用程序将收到通知:

uses FMX.Types, FMX.Platform;

function TForm1.HandleAppEvent(AAppEvent: TApplicationEvent; AContext: TObject): Boolean;
begin
  case AAppEvent of
    TApplicationEvent.FinishedLaunching:    Log.d('Launched.');
    TApplicationEvent.BecameActive:         Log.d('Gained focus.');
    TApplicationEvent.EnteredBackground:    Log.d('Now running in background.');
    TApplicationEvent.WillBecomeForeground: Log.d('Restoring from background.');
    TApplicationEvent.WillBecomeInactive:   Log.d('Going to lose focus.');
    TApplicationEvent.WillTerminate:        Log.d('Quitting the application.');
    TApplicationEvent.LowMemory:            Log.d('Device running out of memory.');

    // iOS only
    TApplicationEvent.TimeChange:           Log.d('Significant change in time.');
    TApplicationEvent.OpenURL:              Log.d('Request to open an URL.');
  end;

  Result := True;
end;

procedure TForm11.FormCreate(Sender: TObject);
var
  aFMXApplicationEventService: IFMXApplicationEventService;
begin
  if TPlatformServices.Current.SupportsPlatformService(IFMXApplicationEventService,
    IInterface(aFMXApplicationEventService))
  then
    aFMXApplicationEventService.SetApplicationEventHandler(HandleAppEvent)
  else
    Log.d('Application Event Service not supported.');
end;

有关事件类型的更多信息here

good article Paweł Głowacki 关于这个主题(对于 Delphi XE5,但仍然有用)。