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How to achieve blurred background visual effect [closed]

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Please do you know how to achieve this effect (blur on the background) in Android?

How to achieve blurred background visual effect [closed]

My HTC WildFire does this when is about to be turned off


I googled for "android blur background" and found this blog post. Basically:

dialog = new AlertDialog.Builder(this). /*... setTitle and so on ...*/ ;

WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();  
lp.dimAmount=0.0f;  // this sets the amount of darkening
dialog.getWindow().setAttributes(lp);  
dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
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