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首页 / 操作系统 / Linux / Android开发:Theme常用技巧

Theme 和 Style 的区别: + Theme 是 Style 的集合 + Style 作用于单个 View 对象,而 Theme 则作用于一个特定 Activity 中的所有 View 对象 + 可以认为 Theme“ 是一种 ”Style + 多个 Theme 可以同时作用于同一个 Activity + Android 操作系统已经在 android.R.style 中预定义了诸如 Theme_Black , Theme_Light , Theme_NoTitleBar_Fullscreen 等 Theme 1.     创建 styles.xml 文件,用作 Theme
编辑 styles.xml ,使之如下: <? xml version = "1.0" encoding = "utf-8" ?> < resources >          < style name = "right" >                    < item name = "android:gravity" > right </ item >          </ style >                   < style name = "green_glow" >                    < item name = "android:textStyle" > bold </ item >                    < item name = "android:shadowColor" > #0F0 </ item >                    < item name = "android:shadowRadius" > 3.0 </ item >                    < item name = "android:shadowDx" > 1.5 </ item >                    < item name = "android:shadowDy" > 1.3 </ item >                    < item name = "android:textColor" > #FFF </ item >          </ style > </ resources >   2.     修改 main.xml ,使之如下: <? 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 = "Big!"              android:textSize = "128px"              android:textColor = "#FF0"     />            < TextView                android:layout_width = "fill_parent"              android:layout_height = "wrap_content"              android:text = "Hello, Android!"              android:textSize = "16px"              android:textColor = "#F00"     />              < TextView                android:layout_width = "fill_parent"              android:layout_height = "wrap_content"              android:text = "Glow"              android:textSize = "96px"     />     </ LinearLayout >   3.     修改 Activity 对应的代码,使之如下: public class ControlTheme extends Activity {     @Override     public void onCreate(Bundle savedInstanceState)     {         super .onCreate(savedInstanceState);           // setTheme 方法的调用 , 一定要在 setContentView 之前         setTheme(R.style. right );         setTheme(R.style. green_glow );                 setContentView(R.layout. main );     } }   4.     运行结果