layoutheight

Layoutheight, usually written as layout_height in layout files, is a property that specifies the vertical size of a view within its parent container. It defines how much vertical space the element should take during layout, subject to the rules of the surrounding layout system and the size of neighboring views.

Common values fall into fixed, dynamic, or fill categories. In Android, the typical options are a concrete dimension (for example, 48dp), wrap_content, and match_parent. The legacy synonym fill_parent is still recognized in older code. Dimensions use density-independent units such as dp, while wrap_content makes the view measure itself to fit its content.

Layout height interacts with other layout attributes and with the parent’s behavior. In linear layouts, a view can use layout_height="0dp" together with layout_weight to receive a portion of remaining vertical space. In constraint-based layouts, height is constrained by vertical constraints rather than weight, but the concept remains: layout_height conveys the preferred or required vertical size unless restricted by the parent.

Example usage in Android XML: a view with android:layout_height="wrap_content" will size itself to fit its content, while android:layout_height="match_parent" fills the available vertical space within the parent. A fixed height might be specified as android:layout_height="48dp".

Notes: layout_height is specific to certain UI frameworks that use XML-based layouts (not a general CSS property). Designers should consider padding, margins, scrolling containers, and the interplay with layout_width and vertical constraints when planning responsive layouts.