Android layout XML Summary

Common attributes:

JavaCodeAssociate the control with btn1

Android: Id = "@ + ID/btn1"

 

Widget width

Android: layout_width = "80px" // "80dip" or "80dp"

Android: layout_width = "wrap_content"

Android: layout_width = "match_parent"

 

Control height

Android: layout_height = "80px" // "80dip" or "80dp"

Android: layout_height = "wrap_content"

Android: layout_height = "match_parent"

 

Control Layout

Android: Orientation = "horizontal"

 

Android: Orientation = "vertical"

 

Widget spacing

Android: layout_marginleft = "5dip" // left

Android: layout_marginright = "5dip" // distance to the right

Android: layout_margintop = "5dip" // distance from above

 

Android: layout_marginright = "5dip" // distance from the following

 

Widget display position

 

Android: gravity = "center" // left, right, top, bottom

 

Android: gravity = "center_horizontal"

Android: layout_gravity is the gravity direction of the element to the parent element.

Android: layout_gravity attribute sets the display position of the control relative to the parent control.

Android: gravity is the gravity direction of all child elements of the current element.

Android: layout_gravity = "center_vertical"

 

Android: layout_gravity = "left"

Android: layout_gravity = "Left | bottom"

 

Textview attributes

 

Android: text = "@ string/text1" // define the value of text1 in string. xml

 

Android: textsize = "20sp"

 

Android: textcolor = "# ff123456"

 

Android: textstyle = "bold" // normal, italic, and bold_italic are set in combination. Example: bold | Italic

Text-related attributes

 

Android: hint prompt when the text content is empty

Android: textcolorhight: highlighted color when the text is selected

 

Control of input content

 

Android: Number can only be a number. Value range [integer, decimal, signed], which can be set in combination. Example: integer | signed

 

Define whether the control is visible

Android: visibility = "visible" // visible

 

Android: visibility = "invisible" // invisible, but the position occupied in the layout is still

Android: visibility = "gone" // invisible, completely removed from the Layout

 

Define background image

 

Android: Background = "@ drawable/img_bg" // img_bg indicates an image under drawable.

Seekbar control background image and maximum value

Android: progressdrawable = "@ drawable/seekbar_img"

 

Android: thumb = "@ drawable/thumb"

 

Android: max = "60"

Valid only in relativelayout:

 

Relative Position of the parent Layout

 

Android: layout_alignparentleft = "true" // on the left of the layout

 

Android: layout_alignparentright = "true" // on the right of the Layout

 

Android: layout_alignparenttop = "true" // above the Layout

 

Android: layout_alignparentbottom = "true" // under the Layout

Relative Position of a widget

 

Android: layout_torightof = "@ ID/button1" // on the right side of the control button1, not just close

 

Android: layout_toleftof = "@ ID/button1" // on the left side of the control button2, not just close

Android: layout_below = "@ ID/button1" // under the control button1, not just at the bottom

 

Android: layout_above = "@ ID/button1" // under the control button1, not just the front and bottom

Definition and a widget

 

Android: layout_aligntop = "@ ID/button1" // aligntop = "@ ID/button1"

Android: layout_alignbottom = "@ ID/button1" // align with the lower part of the control button1

 

Android: layout_alignleft = "@ ID/button1" // align left with the control button1

Android: layout_alignright = "@ ID/button1" // right-aligned with the control button2

 

Android: layout_centerhorizontal = "true" // horizontally centered

Android: layout_centervertical = "true"

Android: layout_centerinparent = "true"

Valid only in linearlayout

Sets the percentage of controls in a row or column.

 

Android: layout_weight = "1"

XML Attribute of view:

Known direct subclass:

Analogclock, imageview, keyboardview, progressbar, surfaceview, textview, viewgroup, viewstub

 

Known indirect subclass:

 

abslistview, absseekbar, absspinner, vertex, adapterview, appwidgethostview, callback, button, checkbox, checkedtextview, chronometer, distance, datepicker, dialerfilter, digitalclock, edittext, distance, distance, gallery, glsurfaceview, gallery, gallery, gridview, layout, imagebutton, imageswitcher, linearlayout, listview, mediacontroller, metrics, radiogroup, ratingbar, relativelayout, scrollview, seekbar, category, spinner, tabhost, tabwidget, tablelayout, tablerow, textswitcher, timepicker, togglebutton, cursor, videoview, viewanimator, viewflipper, viewswitcher, Web View, zoombutton, zoomcontrols