CODEWITHSUNDEEP
androidandroid-themeandroid-styles
ODINN
ODINN

Reputation: 45

Android using theme values programatically

I want to create a style in a theme and use the values of it in code like this:

        val bgColor = LIST_ITEM_BG_COLOR;
        val textColor = LIST_ITEM_TEXT_COLOR
        val strokeColor = LIST_ITEM_STROKE_COLOR

This is my theme file (theres also theme (night) file similar to this):

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Base.Theme.GuitarComposer" parent="Theme.Material3.DayNight.NoActionBar">
        <!-- Customize your light theme here. -->
        <!-- <item name="colorPrimary">@color/my_light_primary</item> -->
    </style>

    <style name="ListItem">
        <item name="android:background">@color/component_background</item>
        <item name="android:textColor">@color/text</item>
        <item name="android:strokeColor">@color/border_color</item>
    </style>

    <style name="Theme.GuitarComposer" parent="Base.Theme.GuitarComposer" />
</resources>

I havent found any explanation on how to use theme styles properly in code.. only on xaml Hope someone could help me on this, thank you.

Upvotes: 0

Views: 42

Answers (2)

ODINN
ODINN

Reputation: 45

After some very long investigating, I found out how to do it right:

val typedArr = context.obtainStyledAttributes(R.style.ListItem, arrayOf(android.R.attr.background).toIntArray())
val backgroundColor  = typedArr.getColor(0,Color.GRAY)

Make sure you use android.R.attr and not something else like google or androidx.

A nice bonus is that even if this is on view initialization, switching between dark and light theme does work without need to restart the app!

Upvotes: 0

Nguyen Tien Dung
Nguyen Tien Dung

Reputation: 638

Try use this:

val typedValue = TypedValue();
theme.resolveAttribute(R.attr.strokeColor, typedValue, true);
val strokeColor  = ContextCompat.getColor(this, typedValue.resourceId)

Upvotes: 0

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