combobox
http://docwiki.embarcadero.com/RADStudio/Berlin/en/Using_Pickers_to_Provide_Platform-Specific_Behavior_and_View_of_Selection_Controls
http://docwiki.embarcadero.com/Libraries/Berlin/en/FMX.ListBox.TComboBox_Properties
http://docwiki.embarcadero.com/Libraries/Berlin/en/FMX.ListBox.TCustomComboBox.Placement
DropDownKind属性
Placement：
Custom |
Defines to use the standard FireMonkey drop-down list controls to select string items from drop-down lists. |
|
|
Defines to use the TCustomListPicker picker to provide platform-specific list controls to select string items from drop-down lists. |
Native效果
Custom效果。
原文：http://www.cnblogs.com/cb168/p/6130278.html