Activity layout and instances in Android

 

1. How to Use linearlayout Some unfamiliar component parameters: /** Center vertically */ Android: gravity = "center_vertical" Note: The Dip format has nothing to do with screen resolution and is applicable to various screens. /** Set single row display */ Android: singleline = "true" 2. Use tablelayou General framework: <Tablelayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent" /** Set the row to be filled */ Android: stretchcolumns = "1" > <Tablerow> <Textview Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: text = "@ string/hello" Android: Background = "#00aa00" Android: textcolor = "# aa0000" /> </Tablerow> </Tablelayout> 3. Implementation of relative layout (depending on the relative relationship between controls) The following are the main attributes of relative layout: <! -- Android: layout_above: Move the control's bottom to the control with the given ID Android: layout_below: place the top of the control under the control with the given ID 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_alignbaseline the baseline of the control is aligned with the baseline of the control with the given ID Android: layout_alignbottom: Compares 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: aligntop Android: alignparentbottom if the value is true, the bottom of the control is aligned with the bottom of the parent control. 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 space is aligned with the top of the parent control. If the Android: layout_centerhorizontal value is true, the control will be centered in the horizontal direction. Android: layout_centerinparent if the value is true, the control is centered in the horizontal and vertical directions of the parent control. Android: layout_centervertical if the value is true, the control is centered in the vertical direction --> /** to set the padding */ * Android: padding = "10px" /** is a custom Android color */ * Android: Background = "@ Android: drawable/editbox_background " /** to set the margin */ Android: layout_marginleft =" 10px "