Support mask

[ernest-p]

Work great with rectangular shapes.

It will be great to see support for round corners or mask.

[Dimezis]

It supports rounded corners just like any other View.
#37

[ernest-p]

@Dimezis Thanks, it's working, however two issues there:

1. background color not only clipping but also affect image
2. this method only supported on Lollipop and above

first issue I solved by providing almost transparent color "#0001"

second issue solved by extending BlurView

class ClippedBlurView : BlurView {

    constructor(context: Context) : super(context)

    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)

    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr)

    override fun draw(canvas: Canvas) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            val path = Path()
            val px =
                Math.round(10 * (context!!.resources.displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT)).toFloat()
            path.addRoundRect(RectF(1f, 1f, width.toFloat() - 2, height.toFloat() - 2), px, px, Path.Direction.CW)
            canvas.clipPath(path)
        }

        super.draw(canvas)
    }
}

[Dimezis]

background color not only clipping but also affect image

What do you mean by this?

Well the thing is, BlurView is not anyhow special in regards to corners, clipping, etc. All the rules that apply to the regular View, work here as well.
So yeah, before Lollipop you got to clip manually.

[ernest-p]

I mean if background is black it slightly tinted content to black

[Dimezis]

The background color you define in XML drawable?
You don't have to do it, AFAIR, you can just have it completely transparent.