XML Attribute Definition

1. Reference: refer to a resource ID.

1) attribute definition:

<Declare-styleable name = "name">

<ATTR format = "Reference" name = "background"/>

</Declare-styleable>

 

 

2) attribute usage:

<Imageview

Android: layout_width = "42dip"

Android: layout_height = "42dip"

Android: Background = "@ drawable/image ID"/>

 

 

2. Color: color value.

(1) attribute definition:

<Declare-styleable name = "name">

<ATTR format = "color" name = "textcolor"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Textview

Android: layout_width = "42dip"

Android: layout_height = "42dip"

Android: textcolor = "#00ff00"/>

 

 

3. boolean: Boolean value.

(1) attribute definition:

<Declare-styleable name = "name">

<ATTR format = "Boolean" name = "focusable"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Button

Android: layout_width = "42dip"

Android: layout_height = "42dip"

Android: focusable = "true"/>

 

 

4. dimension: dimension value.

(1) attribute definition:

<Declare-styleable name = "name">

<ATTR format = "dimension" name = "layout_width"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Button

Android: layout_width = "42dip"

Android: layout_height = "42dip"/>

 

 

5. Float: floating point value.

(1) attribute definition:

<Declare-styleable name = "alphaanimation">

<ATTR format = "float" name = "fromalpha"/>

<ATTR format = "float" name = "toalpha"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Alpha

Android: fromalphi = "1.0"

Android: toalpha = "0.7"/>

 

 

6. Integer: integer value.

(1) attribute definition:

<Declare-styleable name = "animatedrotatedrawable">

<ATTR format = "integer" name = "frameduration"/>

<ATTR format = "integer" name = "framescount"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Animated-Rotate

Android: frameduration = "100"

Android: framescount = "12"

/>

 

 

7. String: string.

(1) attribute definition:

<Declare-styleable name = "mapview">

<ATTR format = "string" name = "apikey"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Com. Google. Android. Maps. mapview

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"

Android: apikey = "0jokq80od1jl9c6haja99ugxcri2cgjko_bc_g"/>

 

 

8. fraction: percentage.

(1) attribute definition:

<Declare-styleable name = "rotatedrawable">

<ATTR format = "fraction" name = "Hangzhou TX"/>

<ATTR format = "fraction" name = "policty"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Rotate

Android: Required Tx = "200%"

Android: Ty = "300%"

/>

 

 

9. Enum: enumeration value.

(1) attribute definition:

<Declare-styleable name = "name">

<ATTR name = "orientation">

<Enum name = "horizontal" value = "0"/>

<Enum name = "vertical" value = "1"/>

</ATTR>

</Declare-styleable>

 

 

(2) attribute usage:

<Linearlayout

Android: Orientation = "vertical">

</Linearlayout>

 

 

10. Flag: bitwise OR operation.

(1) attribute definition:

<Declare-styleable name = "name">

<ATTR name = "windowsoftinputmode">

<Flag name = "stateunspecified" value = "0"/>

<Flag name = "stateunchanged" value = "1"/>

<Flag name = "statehidden" value = "2"/>

<Flag name = "statealwayshidden" value = "3"/>

<Flag name = "statevisible" value = "4"/>

<Flag name = "statealwaysvisible" value = "5"/>

<Flag name = "adjustunspecified" value = "0x00"/>

<Flag name = "adjustresize" value = "0x10"/>

<Flag name = "adjustpan" value = "0x20"/>

<Flag name = "adjustnothing" value = "0x30"/>

</ATTR>

</Declare-styleable>

 

 

(2) attribute usage:

<Activity

Android: windowsoftinputmode = "stateunspecified | stateunchanged | statehidden">

</Activity>

 

 

Note: multiple types of values can be specified during attribute definition:

(1) attribute definition:

<Declare-styleable name = "name">

<ATTR format = "reference | color" name = "background"/>

</Declare-styleable>

 

 

(2) attribute usage:

<Imageview

Android: layout_width = "42dip"

Android: layout_height = "42dip"

Android: Background = "@ drawable/image ID | #00ff00"/>