问题

Delphi 10.4 的安卓权限申请代码，在 Delphi 11 下面编译无法通过。

原因

原因是里面有几个变量类型的定义有所不同。

procedure TDmBLE.RequestPermissionsResult(Sender: TObject;  const APermissions: TArray<string>;  const AGrantResults: TArray<TPermissionStatus>);

上述代码是 Delphi 10.4 的，里面有两个类型需要更改：

1. TArray<string> 更改为：TClassicStringDynArray；

2. TArray<TPermissionStatus> 更改为：TClassicPermissionStatusDynArray；

procedure DisplayRationale(Sender: TObject; const APermissions: TArray<string>; const APostRationaleProc: TProc);

同样，上面这个函数里面的 TArray<string> 更改为：TClassicStringDynArray；

适用于 Delphi 11 的安卓权限动态申请的完整代码

我把代码封装到一个单独的 DataModule 里面了。这样方便在不同的项目里重复使用。

unit UDmPermissions;
// 安卓的权限申请代码 Delphi 11
interfaceusesSystem.SysUtils, System.Types, System.Classes, System.Permissions, FMX.DialogService, System.UITypes;typeTDmPermissions = class(TDataModule)private{ Private declarations }FGotPermission: TNotifyEvent;procedure RequestPermissionsResult(Sender: TObject; const APermissions: TClassicStringDynArray; const AGrantResults: TClassicPermissionStatusDynArray);procedure DisplayRationale(Sender: TObject; const APermissions: TClassicStringDynArray; const APostRationaleProc: TProc);procedure DoGotPermissions;public{ Public declarations }property OnGotPermissions: TNotifyEvent read FGotPermission write FGotPermission;end;varDmPermissions: TDmPermissions;implementation{%CLASSGROUP 'FMX.Controls.TControl'}{$R *.dfm}{ TDmPermissions }procedure TDmPermissions.DisplayRationale(Sender: TObject;const APermissions: TClassicStringDynArray; const APostRationaleProc: TProc);
begin//Rationale: 理由TDialogService.ShowMessage('We need to be given permission to discover BLE devices',procedure(const AResult: TModalResult)beginAPostRationaleProc;end)
end;procedure TDmPermissions.DoGotPermissions;
beginif Assigned(FGotPermission) then FGotPermission(Self);
end;procedure TDmPermissions.RequestPermissionsResult(Sender: TObject;const APermissions: TClassicStringDynArray;const AGrantResults: TClassicPermissionStatusDynArray);
beginif (Length(AGrantResults) = 1) and (AGrantResults[0] = TPermissionStatus.Granted) thenSelf.DoGotPermissionselseTDialogService.ShowMessage('Cannot start BLE scan as the permission has not been granted');
end;end.

又及：

上述代码中，DoGotPermissions 方法，用于调用这个模块的地方，当用户在申请权限的界面上通过了权限申请后，要执行的代码，通过这个事件方法调用。