XML attributes of the Android Spinner component (for future reference)

Java. lang. object | ___ android. view. view | ___ android. view. viewGroup | ___ android. widget. adapterView <T extends android. widget. adapter> | ___ android. widget. absSpinner | ___ android. widget. the Spinner class summary displays only the visual controls of a sub-View in the container at a time, and allows you to select within the specified range. The project in the Spinner comes from the Adapter associated with it. Description: android: dropDownHorizontalOffset setDropDownHorizontalOffset: When the drop-down mode is set to "dropdown", the offset of the drop-down project selection window in the horizontal direction relative to the Spinner window. It must be a floating point size value with a unit, for example, "14.5sp ". Valid units include: px (pixels), dp (density-independent pixels), sp (pixels scaled based on the size of the referenced font), in (INCHES) mm (mm ). This attribute can also reference a resource (Format: @ [package:] type: name) or a topic attribute containing this type of value (Format :? [Package] [type:] name ). This attribute corresponds to the resource symbol dropDownHorizontalOffset of the global attribute. Android: dropDownSelector is used to set the Display Effect of the List selector when spinnerMode = "dropdown. It can reference other resources in the format of "@ [+] [package]: type: name" or "? The format of [package:] [type:] name is used to apply the topic attribute, it can also be color values in the format of "# rgb", "# argb", "# rrggbb", and "aarrggbb. Its global attribute resource symbol is dropDownSelector. Android: dropDownVerticalOffset setDropDownVerticalOffset (int) spinnerMode = "dropdown", the offset of the vertical direction of the drop-down project selection window relative to the Spinner window. This attribute must be a floating point size value with units, for example, "14.5sp ". Valid units include: px (pixels), dp (density-independent pixels), sp (pixels scaled based on the size of the referenced font), in (INCHES) mm (mm ). You can also reference a resource (Format: @ [package:] type: name) or a topic attribute containing this type of value (Format :? [Package] [type:] name ). This attribute corresponds to the global attribute resource symbol dropDownVerticalOffset. Android: dropDownWidth setDropDownWidth (int) specifies the width of the drop-down box when the spinnerMode is "dropdown. This attribute can be a floating point size value with a unit, for example, 14.5sp. Valid units include: px (pixels), dp (density-independent pixels), sp (pixels scaled based on the size of the referenced font), in (INCHES) mm (mm ). You can also reference a resource (Format: @ [package:] type: name) or a topic attribute containing this type of value (Format :? [Package] [type:] name ). It can also be one of the following constants: fill_parent =-1. The width of the drop-down box should be set using the screen width. This constant is discarded from API Level 8 and replaced by the mach_parent constant. Mach_parent =-1. The width of the drop-down box should be set using the screen width. It is introduced in API Level 8. Wrap_content =-2. The width of the drop-down box should be consistent with its content. Its global resource symbol is dropDownWidth. Android: gravity setGravity (int) is used to set the alignment of the selected project. It must be one or a combination of the following constant values (separated by the '|' symbol ). Top = 0x30: place the selected object on the top of its container without changing its size. Bottom = 0x50: place the selected object at the bottom of its container without changing its size. Left = 0x03: place the selected object to the left of its container without changing its size. Right = 0x05: place the selected object to the right of its container without changing its size. Center_vertical = 0x10: place the selected object in the vertical center of its container without changing its size. Fill_vertical = 0x70: to fully fill its container, the system increases the vertical size of the selected object as needed. Center_horizontal = 0x01: place the selected object in the horizontal center of its container without changing its size. Fill_horizontal = 0x07: to fully fill its container, the system will increase the horizontal size of the selected object as needed. Center = 0x11: place the selected object in the vertical and horizontal center of its container without changing its size. Fill = 0x77: to fully fill the container, the system will add the horizontal and vertical sizes of the selected object as needed. Clip_vertical = 0x80: optional additional settings. You can set the upper and lower edges of sub-objects in the container to crop the border of the container. The cropping is based on the Vertical Alignment Method: The top alignment will crop the bottom edge, and the bottom alignment will crop the top edge, not both the top and bottom edges. Clip_horizontal = 0x08: optional additional settings. You can set the left and right edges of sub-objects in the container to crop the border of the container. The cropping is based on the Horizontal Alignment Method: The left alignment will crop the right edge, and the right alignment will crop the left edge, not both the left and right edges. Start = 0x00800003: place the object at the starting position of its container without changing its size. End = 0x00800005: place the object at the end of its container without changing its size. The corresponding global attribute resource symbol is gravity. Note: a Spinner object is a window object container. Setting Its gravity attribute only changes the alignment of the sub-window objects in the container, and does not change the alignment of the content in the sub-Windows. Android: popupBackground setPopupBackgroundResource (int) uses this attribute to set the background of the drop-down list when the spinner = "dropdown. You can use the "@ [+] [package:] type: name" format to reference another resource or use "? In the format of [package:] [type:] name, you can also use color values in the format of "# rgb", "# argb", "# rrggbb", and "# aarrggbb. The corresponding global attribute resource symbol is popupBackground android: prompt. This attribute is used to display the prompt when the Spinner dialog box is displayed. It must use the "@ [+] [package:] type: name" format to reference another resource, or use "? The format of [package:] [type:] name is used to apply the topic attribute. The corresponding global attribute resource symbol is prompt. Android: spinnerMode: sets the display mode of the Spinner. Must be one of the following constants: dialog = 0: the Spinner is displayed as a counterpart window. Dropdown = 1: the Spinner is displayed as an embedded drop-down list. The corresponding global attribute resource symbol is spinnerMode.