The following is a detailed analysis of the custom attribute format in Android. For more information, see
1. reference: refer to a resource ID.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "name">
<Attr name = "background" format = "reference"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<ImageView
Android: layout_width = "42dip"
Android: layout_height = "42dip"
Android: background = "@ drawable/image ID"
/>
2. color: color value.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "name">
<Attr name = "textColor" format = "color"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<TextView
Android: layout_width = "42dip"
Android: layout_height = "42dip"
Android: textColor = "#00FF00"
/>
3. boolean: boolean value.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "name">
<Attr name = "focusable" format = "boolean"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<Button
Android: layout_width = "42dip"
Android: layout_height = "42dip"
Android: focusable = "true"
/>
4. dimension: dimension value.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "name">
<Attr name = "layout_width" format = "dimension"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<Button
Android: layout_width = "42dip"
Android: layout_height = "42dip"
/>
5. float: floating point value.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "AlphaAnimation">
<Attr name = "fromAlpha" format = "float"/>
<Attr name = "toAlpha" format = "float"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<Alpha
Android: fromalphi = "1.0"
Android: toAlpha = "0.7"
/>
6. integer: integer value.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "AnimatedRotateDrawable">
<Attr name = "visible"/>
<Attr name = "frameDuration" format = "integer"/>
<Attr name = "framesCount" format = "integer"/>
<Attr name = "pivotX"/>
<Attr name = "ty"/>
<Attr name = "drawable"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<Animated-rotate
Xmlns: android = "http://schemas.android.com/apk/res/android"
Android: drawable = "@ drawable/image ID"
Android: Required Tx = "50%"
Android: Ty = "50%"
Android: framesCount = "12"
Android: frameDuration = "100"
/>
7. string: string.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "MapView">
<Attr name = "apiKey" format = "string"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<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:
Copy codeThe Code is as follows:
<Declare-styleable name = "RotateDrawable">
<Attr name = "visible"/>
<Attr name = "fromDegrees" format = "float"/>
<Attr name = "toDegrees" format = "float"/>
<Attr name = "effectx" format = "fraction"/>
<Attr name = "ty" format = "fraction"/>
<Attr name = "drawable"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<Rotate
Xmlns: android = "http://schemas.android.com/apk/res/android"
Android: interpolator = "@ anim/animation ID"
Android: fromDegrees = "0"
Android: toDegrees = "360"
Android: Required Tx = "200%"
Android: Ty = "300%"
Android: duration= "5000"
Android: repeatMode = "restart"
Android: repeatCount = "infinite"
/>
9. enum: enumeration value.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "name">
<Attr name = "orientation">
<Enum name = "horizontal" value = "0"/>
<Enum name = "vertical" value = "1"/>
</Attr>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<LinearLayout
Xmlns: android = "http://schemas.android.com/apk/res/android"
Android: orientation = "vertical"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
>
</LinearLayout>
10. flag: bitwise OR operation.
(1) attribute definition:
Copy codeThe Code is as follows:
<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:
Copy codeThe Code is as follows:
<Activity
Android: name = ". StyleAndThemeActivity"
Android: label = "@ string/app_name"
Android: windowSoftInputMode = "stateUnspecified | stateUnchanged | stateHidden">
<Intent-filter>
<Action android: name = "android. intent. action. MAIN"/>
<Category android: name = "android. intent. category. LAUNCHER"/>
</Intent-filter>
</Activity>
Note:
You can specify multiple types of values when defining attributes.
(1) attribute definition:
Copy codeThe Code is as follows:
<Declare-styleable name = "name">
<Attr name = "background" format = "reference | color"/>
</Declare-styleable>
(2) attribute usage:
Copy codeThe Code is as follows:
<ImageView
Android: layout_width = "42dip"
Android: layout_height = "42dip"
Android: background = "@ drawable/image ID | #00FF00"
/>
