Android Layout properties

Here is a list of some of the layout properties used in different layout managers in android

Property	Possible Values	Notes
android:layout_width	"wrap_content”:adjusts the size of the control to fit according to its contents.  “fill_parent”: adjusts the size of the content to fit all the available space of the parent. numeric value of pixels(px), points(pt), inches(in), millimeters(mm), Density(dp) density-independent pixels based on 160 dpi (dot per inch), Scale (sp) Scale-independent pixels (dimensions that allow for user sizing; helpful for use in fonts).
android:layout_height	Same as android:layout_width
android:orientation	Vertical or horizontal	Used as a property for the container in LinearLayout
android:layout_weight	Numeric value: determines the ratio by which widgets share empty soace in the container. The lower value occupies more space
android:layout_gravity	top:widget positioned at the top of the container. Center: positioned at the center of the container both vertically and horizontally. center_horizontal: positioned at the horizontal center of the container. Center_vertical: positioned at the vertical center of the container. Bottom: positioned at the bottom of the container. fill_horizontal: grows the vertical size of the widget if needed, so it completely fills the container. fill_vertical: grows the horizontal size of the widget if needed, so it completely fills the container. fill: grows the size if needed of the widget both horizontally and vertically so it fills the container. Clip_vertical: Additional option that can be set to have the top and/or bottom edges of the child clipped to its containers bounds. The clip will be based on the vertical gravity: a top gravity will clip the bottom edge, a bottom gravity will clip the top edge, and neither will clip both edges. Clip_horizontal: Additional option that can be set to have the left and/or right edges of the child clipped to its containers bounds. The clip will be based on the horizontal gravity: a left gravity will clip the right edge, a right gravity will clip the left edge, and neither will clip both edges.
android:gravity	Same as android:layout_gravity	Used for the content of a widget
android:padding	Apply padding value to the four edges of the widget. numeric value of pixels(px), points(pt), inches(in), millimeters(mm), Density(dp) density-independent pixels based on 160 dpi (dot per inch), Scale (sp) Scale-independent pixels (dimensions that allow for user sizing; helpful for use in fonts).
android:paddingTop	Applies padding value to the top of the widget. Values same as android:padding
android:paddingBottom	Applies padding value to the bottom of the widget. Values same as android:padding
android:paddingRight	Apply padding value to the right of the widget. Values same as android:padding
android:paddingLeft	Apply padding value to the left of the widget.  Values same as android:padding
android:layout_alignParentTop	True|false: used in relative layout, aligns the widget’s top edge with the top of the container
android:layout_alignParentBottom	True|false: used in relative layout, aligns the widget’s top edge with the bottom of the container
android:layout_alignParentLeft	True|false: used in relative layout, aligns the widget’s left edge with the left of the container
android:layout_alignParentRight	True|false: used in relative layout, aligns the widget’s right edge with the right of the container

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