Android layout File Attribute notes)

Attribute	Description	Description
Android: ID	Specify the corresponding ID for the control
Android: Text	Specify the text displayed in the control. Note that strings in the strings. xml file should be used as much as possible here.
Android: gravity	Specifies the alignment mode of the view component. For example, the center and right positions indicate that the text position in the control is not the control itself.
Android: layout_gravity	Specifies the iner component alignment. for example, if a button is in linearlayout, you can set it by placing it on the left or right. take the button as an example. For Android: layout_gravity = "right", the button is right-aligned.
Android: textsize	Specifies the font size in the control.
Android: Background	Specifies the background color used by the control. The RGB naming method is used.
Android: width	Width of the control
Android: Height	Height of the control
Android: layout_width	Specify the container component width
Android: layout_height	Height of the container component
Android: layout_weight	View is a very important attribute, divided by proportion of space
Android: padding *	Specifies the padding of the control, that is, the content of the control.
Android: sigleline	If set to true, the control content is displayed in the same row.
Android: scaletype	Is to control how the image resized/moved to match the siz of the imageview
Android: layout_centerhrizontal	Horizontal Center
Android: layout_centervertical	Vertical center
Android: layout_centerinparent	Completely centered relative to the parent Element
Android: layout_alignparentbottom	Stick the lower edge of the parent Element
Android: layout_alignparentleft	Attach the left edge of the parent Element
Android: layout_alignparentright	Attach the right edge of the parent Element
Android: layout_alignparenttop	Attach the upper edge of the parent Element
Android: layout_alignwithparentifmissing	If the corresponding sibling element cannot be found, the parent element will be used as a reference object.
Android: layout_below	Below an element
Android: layout_abve	Above an element
Android: layout_toleftof	On the left of an element
Android: layout_torightof	On the Right of an element
Android: layout_aligntop	The top edge of the element is aligned with the top edge of an element.
Android: layout_alignleft	The left edge of the element is aligned with the left edge of an element.
Android: layout_alignbottom	The bottom edge of the element is aligned with the bottom edge of an element.
Android: layout_alignright	The right edge of the element is aligned with the right edge of an element.
Android: layout_marginbottom	Distance from the bottom edge of an element
Android: layout_marginleft	Distance from the left edge of an element
Android: layout_marginright	Distance from the right edge of an element
Android: layout_margintop	Distance from the edge of an element
Android: paddingleft	The distance between the content of this element and the right edge of an element
Android: paddingright	The distance between the content of this element and the edge of an element
Android: hint	Prompt information in the input box when edittext is set to null
Android: linearlayout	It determines the direction of linearlayout. Its value can be vertical, indicating the vertical layout of horizontal, indicating the horizontal layout.