How to convert String to int Color value

Question

I want to set background with gradient. This's my code:

val startColor = "0xFFAC235E"
val endColor = "0xFF640C35"
val gradient = GradientDrawable(
    GradientDrawable.Orientation.LEFT_RIGHT,
    intArrayOf(
        startColor.toInt(),
        endColor.toInt()
    )
)
view.background = gradient

and it through an exception:

java.lang.NumberFormatException: For input string: "0xFFAC235E"

If I replace startColor = 0xFFAC235E, the code above work fine. But that's not what I want.

I need put color as param String. Is there anyway to convert it?

primo · Accepted Answer · 2022-11-04 04:43:43Z

6

Try replacing 0x with #.

For ex:

startColor.replace("0x", "#")

Generally we define colors with hex color codes. So, I think this will work for you.

Edit

You have to parse the color string to convert it into integer.

Color.parseColor(startColor.replace("0x", "#"))

edited Nov 4, 2022 at 4:43

answered Nov 4, 2022 at 4:19

primo

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2 Comments

ninhnau19 Over a year ago

I tried it and still through error NumberFormatException: For input string: "#FFAC235E". I think problem is not using 0x or #, it can't convert string to Int

primo Over a year ago

I have edited my answer. Use Color.parseColor

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