android-Style and Themes

android-Style and Themes
the difference between a style and a theme theme
1. Theme is for window level, change window style
2. The style is for the window element level. Change the style of a specified control or layout

two ways to use style
1, create style
Create a styles.xml file under Res/values
Join node (root node)
Add your own defined style and its properties:
Format of Style

<style name="MyStyle" parent="指定的父style"

There is no need for Android in front of name:

<item name="ATTR须要设置的属性名">[VALUE设定的值]</>

The Parent property is optional and can inherit the properties of other style, while the existing style is
This value is very useful when changing.
Instance:

<style name="ChengzhiStyle">    <item name="android:textColor">#FFF0000</item></style>

2, specifying a style for the control
Specify in Layout:

<TextView   style="@style/MyStyle"/>

Three Theme Theme
1, Usage:
In the manifest file, specify the theme attribute for the activity (this is the recommended way)

android:theme="@style/AppTheme">

Or, when activity is created, it calls the Settheme function (which must be called before Setcontentview. Not recommended for use)

@Override    protectedvoidonCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        //设置主题        setTheme(R.style.AppTheme);        setContentView(R.layout.layout_portrait);     }

2. Using the system's own theme
Frequently used systems theme for example with:

3, define yourself theme

<style name="MyTheme" [parent="继承的主题"]    <item name="ATTR">[VALUE]</></style>

4, example of frosted glass effect
Frosted glass Effect: It is very much the interface of the first startup of the program, or the blurred activity interface behind the popup dialog box

@Override    protectedvoidonCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);         //设置毛玻璃效果        getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND,                 WindowManager.LayoutParams.FLAG_BLUR_BEHIND);     }

android-Style and Themes