在Android中创建一个下拉菜单

添加四个控件

• TToolbar
  • Alignment: alTop
• TSpeedButton
  • Alignment: alRight
  • StyleLookUp: detailstoolbutton
  • Margin, Right: 5 (this is set in case you want to carry this UI over to iOS as well, to account for both bordered (iOS6) and non-bordered (iOS7) button sizes
• TListBox with several items
  • Each of the four listboxitems has a bitmap and text defined via the ItemData property
  • Visibility has been set to False
  • Height has been set to 176px (to show the listbox border right below the last listbox item)
  • Anchors: akTop, akRight
• TShadowEffect
  • Parented to TListBox

ListBox项属性：

TSpeed​​Button属性：

procedure TForm10.OverflowButtonClick(Sender: TObject);
begin
  OverflowMenu.Visible := not OverflowMenu.Visible;
  if OverflowMenu.Visible then
  begin
    OverflowMenu.ApplyStyleLookup;
    OverflowMenu.RealignContent;
end;
end;

原文    http://blogs.embarcadero.com/sarinadupont/2013/10/17/463/