Use of stretchcolumns in tablelayout

<? XML version = "1.0" encoding = "UTF-8"?>

<Tablelayout xmlns: Android = "http://schemas.android.com/apk/res/android"

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"
Android: stretchcolumns = "1">

<! --
Android: stretchcolumns = "1" is the second column for setting all columns of tablelayout.

That is to say, if each row has three columns, the remaining space will be filled by the second column.
-->
<Tablerow>

<! -- Enter from the second column -->
<Textview

Android: layout_column = "1"
Android: text = "open ..."

Android: padding = "3dip"/>
<! -- The size of the blank edge from the character circle to the textview
-->
<! -- Set the method for setting the characters in textview. This is the difference between the right alignment and layout_gravity. -->

<Textview
Android: text = "Ctrl-o"

Android: gravity = "right"
Android: padding = "3dip"/>

</Tablerow>

<Tablerow>
<Textview

Android: layout_column = "1"
Android: text = "Save ..."

Android: padding = "3dip"/>
<Textview

Android: text = "Ctrl-s"
Android: gravity = "right"

Android: padding = "3dip"/>
</Tablerow>

<Tablerow>
<Textview

Android: layout_column = "1"
Android: text = "Save ..."

Android: padding = "3dip"/>
<Textview

Android: text = "Ctrl-shift-s"

Android: gravity = "right"
Android: padding = "3dip"/>

</Tablerow>

<! -- The height of a split line is 2, which is the parent color of textview. -->

<View
Android: layout_height = "2dip"

Android: Background = "# ff909090"/>

<Tablerow>

<Textview
Android: text = "X"

Android: padding = "3dip"/>
<Textview

Android: text = "import ..."
Android: padding = "3dip"/>

</Tablerow>

<Tablerow>
<Textview

Android: text = "X"
Android: padding = "3dip"/>

<Textview
Android: text = "Export ..."

Android: padding = "3dip"/>
<Textview

Android: text = "Ctrl-e"
Android: gravity = "right"

Android: padding = "3dip"/>
</Tablerow>

<View
Android: layout_height = "2dip"

Android: Background = "# ff909090"/>

<Tablerow>

<Textview
Android: layout_column = "1"

Android: text = "quit"
Android: padding = "3dip"/>

</Tablerow>
</Tablelayout>