How to set the blur level of a view background

Question

To set the transparency level of a view background we use

mView.getBackground().setAlpha(mViewTransparencyLvl);

How to set the blur level of a view background?

Knowing that the background is a shape drawable not an image. Knowing that the user controls the blur degree. Knowing that this view is over part of another view.

Answer 1

Android doesn't provide this functionality for UI elements as iOS does. It's not part of the UI rendering engine and to obtain these kind of effects you need to use third-party libraries which will essentially take a snapshot of the drawing cache, reduce its size for a faster processing and then put the generated bitmap into a view.

Here are some example libraries:

• BlurrView
• Blurry

Please bear in mind that this will have a serious performance hit on mid-low end phones.