Spinner2.kt

import android.content.Context
import android.util.AttributeSet
import android.view.View
import android.widget.AdapterView
import android.widget.SpinnerAdapter
import androidx.appcompat.widget.AppCompatSpinner

private const val NO_POSITION = -1

class Spinner2 : AppCompatSpinner {

    private var noClickSelectedPosition = NO_POSITION
    private var isLoadedAdapter = false
    private var withDefAction = true

    constructor(context: Context?) : super(context)
    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs)
    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr)

    fun setSelection(withAction: Boolean, position: Int) {
        setSelection(withAction, position, false)
    }

    fun setSelection(withAction: Boolean, position: Int, animate: Boolean) {
        if (!withAction) {
            noClickSelectedPosition = position
        }
        super.setSelection(position, animate)
    }

    override fun setSelection(position: Int) {
        setSelection(withAction = true, position = position)
    }

    override fun setSelection(position: Int, animate: Boolean) {
        setSelection(withAction = true, position = position, animate = animate)
    }

    override fun setAdapter(adapter: SpinnerAdapter) {
        setAdapter(adapter, true)
    }

    fun setAdapter(adapter: SpinnerAdapter?, withAction: Boolean) {
        withDefAction = withAction
        isLoadedAdapter = false
        super.setAdapter(adapter)
        isLoadedAdapter = true
    }

    override fun setOnItemSelectedListener(onItemSelectedListener: OnItemSelectedListener?) {
        val listener: OnItemSelectedListener = object : OnItemSelectedListener {
            override fun onItemSelected(parent: AdapterView<*>?, view: View, position: Int, id: Long) {
                onItemSelectedListener?.let {
                    if (!isLoadedAdapter || !withDefAction || isLoadedAdapter && noClickSelectedPosition == position) {
                        withDefAction = true
                        noClickSelectedPosition = NO_POSITION
                        return
                    } else {
                        noClickSelectedPosition = NO_POSITION
                        onItemSelectedListener.onItemSelected(parent, view, position, id)
                    }
                }
            }

            override fun onNothingSelected(parent: AdapterView<*>?) {}
        }
        super.setOnItemSelectedListener(listener)
    }
}