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>