Delphi android 显示一个对话框

unit MainForm;

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.StdCtrls, Androidapi.JNI.GraphicsContentViewText, Androidapi.JNI.App, Androidapi.Helpers,
  Androidapi.JNIBridge, Androidapi.JNI.JavaTypes, Androidapi.JNI.Os, Androidapi.JNI.Widget;

type
  TForm1 = class(TForm)
    ButtonShowDialog: TButton;
    procedure ButtonShowDialogClick(Sender: TObject);
  private
    { Private declarations }
    procedure ShowDialog(const ATitle, AMessage: string);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.fmx}

procedure TForm1.ButtonShowDialogClick(Sender: TObject);
begin
  ShowDialog('标题', '这是一个对话框示例');
end;

procedure TForm1.ShowDialog(const ATitle, AMessage: string);
var
  DialogBuilder: JAlertDialog_Builder;
begin
  TThread.Queue(nil,
    procedure
    begin
      DialogBuilder := TJAlertDialog_Builder.JavaClass.init(TAndroidHelper.Context);
      DialogBuilder.setTitle(StrToJCharSequence(ATitle));
      DialogBuilder.setMessage(StrToJCharSequence(AMessage));
      DialogBuilder.setPositiveButton(StrToJCharSequence('确定'), nil);
      DialogBuilder.create.show;
    end);
end;

end.