背景透明的 Dialog

一:控制Dialog 的背景方法：
1.定义一个无背景主题主题


<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>
<item name="android:windowIsFloating">true</item>
<item name="android:windowIsTranslucent">false</item>
<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>
</style>
</resources>

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