android Activity 透明，半透明效果的設置transparent

轉載地址：點擊打開鏈接

res/values/styles.xml

<resources>
  <style name="Transparent
">
    <item name="android:windowBackground">@color/transparent_background</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsTranslucent">true</item>  
    <item name="android:windowAnimationStyle">@+android:style/Animation.Translucent</item>
  </style>
</resources>

 res/values/color.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <color name="transparent_background">#50000000</color>
</resources>

注意：color.xml的#5000000前兩位是透明的效果參數從00--99（透明--不怎麼透明），後6位是顏色的設置

manifest.xml

<activity android:name=".TransparentActivity" android:theme="@style/Transparent">
</activity>

java代碼

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTheme(R.style.Transparent); 
        setContentView(R.layout.transparent);
}