How do I get the color values of the indices in the array?

Asked Jul 20 '19 at 20:15

Active Jan 24 '20 at 13:19

Viewed 92 times

In androidx version I want to programmatically add the background color of cardview. But I can't do it. Attempt to invoke virtual method 'void androidx.cardview.widget.CardView.setCardBackgroundColor (int)' gives a null object reference error. I couldn't figure it out.

Could you help? Thank you

    CardView cardView = findViewById(R.id.crd);

    int colorArray[] = {R.color.colorCategory1, R.color.colorCategory12,R.color.colorCategory3, R.color.colorCategory4,
            R.color.colorCategory5, R.color.colorCategory6,        R.color.colorCategory7, R.color.colorCategory8,
            R.color.colorCategory9, R.color.colorCategory10, R.color.colorCategory11, R.color.colorCategory12,
            R.color.colorCategory13, R.color.colorCategory14, R.color.colorCategory15,};


    cardView.setCardBackgroundColor(colorArray[0]);

edited Jan 24 '20 at 13:19

asked Jul 20 '19 at 20:15

ihaydinn

well, how can i actual color ? – ihaydinn Jul 20 '19 at 20:51
try my answer i put up – a_local_nobody Jul 20 '19 at 20:52
i actually can't recreate your problem, i thought it was related to your array declaration but it all works for me, hopefully someone else can help you out – a_local_nobody Jul 20 '19 at 21:16
incompatible types. Required: androidx.cardview.widget.CardView Found: int I clicked the error bubble. it was writing error – ihaydinn Jul 20 '19 at 21:18
where is your cardView? can you put up the xml file also? – Masoom Badi Jul 21 '19 at 08:43

How do I get the color values ​of the indices in the array?

0 Answers0

How do I get the color values of the indices in the array?