[Android] style and theme

I. Style

1. style is for the form Element level. It changes the style of the specified control or layout.

2. styles are inherited and overwrite

3. Style definition, defined in RES/styles. xml

Themes. XML and style. XML (in the system source code frameworks \ base \ core \ res \ values \) contains many styles defined by the system. We recommend that you select an appropriate style and then inherit and modify it.

<?xml version="1.0" encoding="UTF-8"?> <resources>  <style name="TextView">   <item name="android:textSize">18sp</item>   <item name="android:textColor">#008</item>   <item name="android:shadowColor">@android:color/black</item>   <item name="android:shadowRadius">2.0</item>  </style>     <style name="EditText">   <item name="android:shadowColor">@android:color/black</item>   <item name="android:shadowRadius">1.0</item>   <item name="android:background">@android:drawable/btn_default</item>   <item name="android:textAppearance">?android:attr/textAppearanceMedium</item>  </style>        <style name="Button">         <item name="android:background">@android:drawable/edit_text</item>         <item name="android:textAppearance">?android:attr/textAppearanceMedium</item>     </style> </resources>

 

Ii. Theme

1. Theme Changes the form style at the form level;

2. Define the positions and methods in the same way as the style, all in RES/styles. XML files can also be defined in RES/theme. in XML files, the difference is that theme's item names are fixed and their values are variable.

<?xml version="1.0" encoding="utf-8"?><resources><style name="CustomTheme">    <!-- Window attributes -->    <item name="windowBackground">@android:drawable/screen_background_dark</item>    <item name="windowFrame">@null</item>    <item name="windowNoTitle">false</item>    <item name="windowFullscreen">false</item>    <item name="windowIsFloating">false</item>    <item name="windowContentOverlay">@android:drawable/title_bar_shadow</item>    <item name="windowTitleStyle">@android:style/WindowTitle</item>    <item name="windowTitleSize">25dip</item>    <item name="windowTitleBackgroundStyle">@android:style/WindowTitleBackground</item>    <item name="android:windowAnimationStyle">@android:style/Animation.Activity</item> </style></resources>

 

Use, Main. xml

<? XML version = "1.0" encoding = "UTF-8"?> <Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android" Android: Orientation = "vertical" Android: layout_width = "fill_parent" Android: layout_height = "fill_parent"> <textview Android: layout_width = "fill_parent" Android: layout_height = "wrap_content" Android: text = "@ string/Hello" style = "@ style/textview"/> <edittext Android: id = "@ + ID/edittext01" Android: layout_height = "wrap_content" style = "@ style/edittext" Android: layout_width = "fill_parent" Android: TEXT = "edittext similar to button"> </edittext> <edittext Android: Id = "@ + ID/edittext02" Android: layout_height = "wrap_content" Android: layout_width = "fill_parent" Android: text = "normal edittext"> </edittext> <button Android: Id = "@ + ID/button01" Android: layout_height = "wrap_content" style = "@ style/button" Android: layout_width = "fill_parent" Android: text = "button similar to edittext"> </button> </linearlayout>