# Gravity and layout gravity #
android:layout_gravity
- android:layout_gravity is used to set the position of an element in its parent (e.g. a child View inside a Layout).
- Supported by LinearLayout and FrameLayout
android:gravity
android:gravity is used to set the position of content inside an element (e.g. a text inside a TextView).
Remarks
LayoutParams and Layout_ Attributes

a RelativeLayout requires two layout passes to render properly. For complex view hierarchies, this can have a significant impact on performance. Nesting RelativeLayouts makes this problem even worse, because every RelativeLayout causes the number of layout passes to go up.
本文详细解析了Android中布局属性android:layout_gravity与内容定位属性android:gravity的作用及区别。android:layout_gravity用于设置子视图在其父布局中的位置,而android:gravity则用于设置元素内部内容的位置。此外,还提到了RelativeLayout的性能问题及其对复杂视图层级的影响。
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