学步园

一:控制Dialog 的背景方法：
1.定义一个无背景主题主题

<!--去掉背景Dialog-->
<style name="NobackDialog" parent="@android:style/Theme.Dialog">
<item name="android:windowBackground">@color/no_back</item>
</style>
2.创建Dialog

dialog = new Dialog(this,R.style.dialog);  
dialog.setContentView(R.layout.dialog_loading);  
or:
dialog = new Dialog(this,R.style.NobackDialog);  
LayoutInflater mInflater = LayoutInflater.from(this);
View dialogProcessBar = mInflater.inflate(R.layout.dialog_loading,null);  
dialog.setView(dialogProcessBar,0, 0, 0, 0);
二:控制Dialog 以及内部控件的背景方法：

dialog = new Dialog(this,R.style.dialog);
WindowManager.LayoutParams lp=dialog.getWindow().getAttributes();
// 模糊度getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND, WindowManager.LayoutParams.FLAG_BLUR_BEHIND); dialog.getWindow().setAttributes(lp);
lp.alpha=0.5f;（0.0-1.0）//透明度，黑暗度为lp.dimAmount=1.0f;
 
三:去掉边框、title 等参数

<resources>
<style name="dialog" parent="@android:style/Theme.Dialog">
<item name="android:windowFrame">@null</item><!--边框-->
<item name="android:windowIsFloating">true</item><!--是否浮现在activity之上-->
<item name="android:windowIsTranslucent">false</item><!--半透明-->
<item name="android:windowNoTitle">true</item>
<item name="android:background">@android:color/black</item>
<item name="android:windowBackground">@null</item>
<item name="android:backgroundDimEnabled">false</item><!--模糊-->
</style>
</resources>