android - Semi-transparent gradients become a solid color on Kitkat -

when run app on kitkat device semi-transparent gradients in app become solid color. unfortunately can't post screenshots due app being in development.

examples:

• semi-transparent grey gradient on light background becomes solid black
• semi-transparent grey gradient on black background becomes solid white

this problem not reproducible on lollipop , above. min sdk 19, compile , target sdks 23.

has ever experienced similar problem?

important edit:

when background app , come rendered correctly.

i able achieve gradient background through code

 gradientdrawable gradientdrawable = new gradientdrawable(                 gradientdrawable.orientation.top_bottom,                 new int[]{0xff151d2a, 0xff591e22, 0xff901e1e}); // gradient color codes         gradientdrawable.setcornerradius(0f);                   // setting corner radius         gradientdrawable.setgradientradius(5);               // setting graidnet radius         gradientdrawable.setgradientcenter(5, 5);         gradientdrawable.setgradienttype(gradientdrawable.linear_gradient);         mdrawerlayout.setbackground(gradientdrawable);