use script intransic blur android
@SuppressLint("NewApi")
private Bitmap blurRenderScript(Bitmap smallBitmap) {
Bitmap output = Bitmap.createBitmap(smallBitmap.getWidth(), smallBitmap.getHeight(), smallBitmap.getConfig());
RenderScript rs = RenderScript.create(getContext());
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
Allocation inAlloc = Allocation.createFromBitmap(rs, smallBitmap, Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_GRAPHICS_TEXTURE);
Allocation outAlloc = Allocation.createFromBitmap(rs, output);
script.setRadius(BLUR_RADIUS);
script.setInput(inAlloc);
script.forEach(outAlloc);
outAlloc.copyTo(output);
rs.destroy();
MutableBitmap.delete(smallBitmap);
return output;
}