Custom View Class In Kotlin with Style Attributes.

attrs.xml

<declare-styleable name="LeaderRankView">
        <attr name="leaderBackground" format="reference" />
        <attr name="leaderIcon" format="reference" />
        <attr name="leaderName" format="string" />
        <attr name="leaderRank" format="enum">
            <enum name="rank1" value="1" />
            <enum name="rank2" value="2" />
            <enum name="rank3" value="3" />
        </attr>
    </declare-styleable>

LeaderRankView.kt

class LeaderRankView @JvmOverloads constructor(
    context: Context,
    val attrs: AttributeSet? = null
) : ConstraintLayout(context, attrs) {


    var binding: ViewLeaderRankBinding

    private var leaderIcon: Drawable? = null
        set(value) {
            field = value
            value?.let {
                binding.ivUserRankNumber.setImageDrawable(it)
            }
        }


    private var leaderBackground: Drawable? = null
        set(value) {
            field = value
            value?.let {
                binding.clRoot.background = it
            }
        }

    init {
        binding = ViewLeaderRankBinding.inflate(
            LayoutInflater.from(context), this, true
        )
        setupView()
    }

    private fun setupView() {
        context.obtainStyledAttributes(
            attrs,
            R.styleable.LeaderRankView,
            0, 0
        ).apply {
            try {
                getDrawable(R.styleable.LeaderRankView_leaderBackground).let {
                    binding.clRoot.background = it
                }
                getDrawable(R.styleable.LeaderRankView_leaderIcon).let {
                    binding.ivUserRankNumber.background = it
                }
                getString(R.styleable.LeaderRankView_leaderName).let {
                    binding.tvUserName.text = it
                }
            } finally {
                recycle()
            }
        }
    }


}