This API is deprecated.
The position of the child element in the linear container, perpendicular to the layout direction, is a property of the child element's layout, similar to align-self in flexible box layout.
When using linear-layout-gravity, align-self, linear-cross-gravity, and align-items simultaneously in a linear layout, the priority decreases from the first to the last. A higher-priority style will override a lower-priority style.

none
Default value。When the size of the parent element cross axis size(such as the width when linear-direction: column) is fixed, and the size of the child element in this direction is auto, none will be equivalent to fill-horizontal or fill-vertical. In other cases it is equivalent to left or top.
stretch
Fill the container's cross axis.
start
Align the beginning of the parent element's cross axis.
end
Align the end of the parent element's cross axis.
center
Align the center of the parent element's cross axis.
top Deprecated
Align the top of the parent element, the horizontal layout takes effect.
bottom Deprecated
Align the bottom of the parent element, the horizontal layout takes effect.
left Deprecated
Align the left side of the parent element, vertical layout takes effect.
right Deprecated
Align the right side of the parent element, vertical layout takes effect.
center-vertical Deprecated
Centered in the vertical direction, the horizontal layout of the parent element takes effect.
center-horizontal Deprecated
Centered in the horizontal direction, the vertical layout of the parent element takes effect.
fill-vertical Deprecated
Fill the entire container vertically, and the horizontal layout of the parent element takes effect.
fill-horizontal Deprecated
Fill up the container horizontally, and the vertical layout of the parent element takes effect.
| Initial value | none |
| Applies to | linear items |
| Inherited | no |
| Animatable |
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None and top/left in linear-layout-gravity are not the same. The specific differences are as follows:
When the parent's non-layout orientation is fixed size, none behaves the same as fill-vertical/fill-horizontal, i.e., fills the parent's non-layout orientation.
None behaves the same as top/right when the parent's non-layout orientation is not a fixed size.