Theme_1

MainActivity.kt

class MyTextView
@JvmOverloads
constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : AppCompatTextView(context, attrs, defStyleAttr),
    ThemeManager.ThemeChangedListener {

    override fun onFinishInflate() {
        super.onFinishInflate()
        ThemeManager.addListener(this)
    }

    override fun onAttachedToWindow() {
        super.onAttachedToWindow()
        ThemeManager.addListener(this)
    }

    override fun onDetachedFromWindow() {
        super.onDetachedFromWindow()
        ThemeManager.removeListener(this)
    }

    override fun onThemeChanged(theme: ThemeManager.Theme) {
        setTextColor(
            ContextCompat.getColor(
                context,
                theme.textViewTheme.textColor
            )
        )
    }
}