How to change drawable background color from code (Java/Kotlin) file

Question

I have created following drawable and set it to a button background from code.

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="8dp"/>
    <solid android:color="@color/background_profile"/>
    <padding android:left="8dp" android:top="7dp" android:right="8dp" android:bottom="6dp" />
</shape>

Kotlin File

  btn?.background= resources?.getDrawable(R.drawable.drawable_rewards)

Now i will be getting color from my service, like this "#00000", and I need to update the color in drawable_rewards.xml file.

Is there any way we can change color of drawable file dynamically.

You could use a MaterialButton (which has as default rounded corners) and use backgroundTint to change the background color. — Gabriele Mariotti
– Gabriele Mariotti, Commented Jul 6, 2020 at 10:01

Oshan Madusanka · Accepted Answer · 2020-07-06 10:07:18Z

1

    val wrappedDrawable: Drawable = DrawableCompat.wrap(ContextCompat.getDrawable(context!!, R.drawable.drawable_rewards)!!)
    DrawableCompat.setTint(wrappedDrawable, ContextCompat.getColor(context!!, R.color.colorPrimary))
    btn?.background = wrappedDrawable

answered Jul 6, 2020 at 10:07

Oshan Madusanka

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Nguyễn Quang Thọ · Accepted Answer · 2020-07-06 10:32:29Z

1

The answer is you get background of the button as drawable -> change color of drawable -> set drawable to background of the button

            val drawable: Drawable = buttonChange.background
            drawable.setColorFilter(Color.GREEN, PorterDuff.Mode.SRC)
            buttonChange.background = drawable

answered Jul 6, 2020 at 10:32

Nguyễn Quang Thọ

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Comments

Zakhar Rodionov · Accepted Answer · 2020-07-06 10:15:44Z

0

fun View.setBgColor(color: String?) {
    val bgColor = parseColor(color) ?: return
    val drawable = if (background is InsetDrawable)
        (background as InsetDrawable).drawable
    else
        background

    when (drawable?.mutate()) { //mutate before change is important
        is ShapeDrawable -> (drawable as ShapeDrawable).paint.color = bgColor
        is GradientDrawable -> (drawable as GradientDrawable).setColor(bgColor)
        is ColorDrawable -> (drawable as ColorDrawable).color = bgColor
    }
}

fun parseColor(color: String?): Int? {
    return try {
        Color.parseColor(color)
    } catch (e: Exception) {
        null
    }
}

answered Jul 6, 2020 at 10:15

Zakhar Rodionov

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