setBackgroundColor is always turn purple

Question

Why when I change the background color through setBackgroundColor(R.id.bg_primary) always turns purple?

My color resource is

<color name="bg_primary">#FFFF0000</color>

Result

Answer 1

i think when you use setBackgroundColor(R.id.bg_primary) must set color code to parameter but you send color id for parameter .

test this . maybe it work : setBackgroundResource(R.id.bg_primary);

Answer 2

试试setBackgroundColor(ContextCompat.getColor(context, R.color.bg_primary))