Android Blur detailed----with renderings

In Android, the edge blur effect is implemented by Blurmaskfilter, which defines an edge blur radius and Blur effect (Blur).

Blur has four kinds of fuzzy effect, inner, normal, outer, solid, the following respectively describes these effects:

1. Blur.inner: The target edge inward, the blur radius is R, if R > Target width, then the out part is not displayed.

2. Blur.normal: Both inside and outside the target edge are blurred, the radius is R, the width and length of the target will increase after the blur--the length of the r+r is increased.

3. Blur.outer: Do not draw the target, blurring the distance from the target edge to the outer radius of R.

4. Blur.solid: Draws the target, blurring the distance from the target edge to the outer radius of R.

Finally, it is attached with no blur effect:

Android Blur detailed----with