Android-relativelayout layout attributes

Android relativelayout layout, that is, relative layout. relative to the control location, when the following attributes are not used to determine the relative positions between controls, the controls overlap.

Reference: Android: layout_above = "@ ID /****"
Android: layout_abve: controls the bottom of the control above the control with the given ID
Android: layout_bellow
Android: layout_toleftof align the right edge of the control with the left edge of the control with the given ID
Android: layout_torightof align the left edge of the control with the right edge of the control with the given ID

Android: layout_alignbasline the baseline of the control is aligned with the baseline of the control with the given ID
Android: layout_alignbottom: Align the bottom edge of the control with the bottom edge of the given ID Control
Android: layout_alignleft: Align the left edge of the control with the given ID
Android: layout_alignright: Align the right edge of the control with the right edge of the given ID Control
Android: layout_aligntop: Align the top edge of the control with the top edge of the given ID Control

Android: layout_alignparentbottom if the value is true, align the top edge of the control with the given ID
Android: layout_alignparentleft if the value is true, the left side of the control is aligned with the left side of the parent control.
Android: layout_alignparentright if the value is true, the right side of the control is aligned with the right side of the parent control.
Android: layout_alignparenttop if the value is true, the top of the control is aligned with the top of the parent control.

Android: layout_centerhorizontal if the value is true, the control is placed in the center of the horizontal direction.
Android: layout_centerinparent if the value is true, this control will be placed in the center of the horizontal and vertical directions of the parent Control
Android: layout_centervertical if this value is true, the control will be placed in the center of the vertical direction