Class help views check change controller, same RadioGroup but more flexible

TabControler.kt

import android.view.View

class TabControler : View.OnClickListener {
  private var listener: OnCheckedChangeListener? = null
  private val tabs = mutableListOf<View>()
  private var lastSelected: Int = 0

  fun setTabs(firstSelected: Int, vararg views: View) {
    tabs.clear()
    for (i in views.indices) {
      val v = views[i]
      v.tag = i
      v.setOnClickListener(this)
      setCheck(v, i == firstSelected)
      tabs.add(v)
    }
    lastSelected = firstSelected
  }

  fun setListener(
      listener: OnCheckedChangeListener) {
    this.listener = listener
  }

  override fun onClick(v: View) {
    val position = v.tag as Int
    setSelection(position)
  }

  fun setSelection(position: Int) {
    if (tabs.isEmpty()
        || tabs.size <= position
        || position < 0)
      return

    if (position == lastSelected) return

    //set checked current tab
    setCheck(tabs[position], true)

    if (lastSelected >= 0 && lastSelected < tabs.size) {
      //set unchecked last tab
      setCheck(tabs[lastSelected], false)
    }

    lastSelected = position

    if (listener != null) {
      listener!!.onChanged(tabs[position].id, position)
    }

  }

  private fun setCheck(v: View, isChecked: Boolean) {
    v.isSelected = isChecked
  }

  interface OnCheckedChangeListener {
    fun onChanged(checkedId: Int, position: Int)
  }

  companion object {
    private val NO_ID = -1
  }
}

ViewGroupCheckController

import android.view.View;
import android.widget.CheckBox;
import android.widget.RadioButton;

/**
 * Created by TALE on 3/20/2014.
 */
public class ViewGroupCheckController implements View.OnClickListener {

  private View[] radioButtons;
  private int mLastSelected = -1;
  public final int NO_VIEW_ID = -1;
  private OnCheckedChangeListener onCheckedChangeListener;

  public void setViews(View... buttons) {
    if (buttons == null || buttons.length == 0) {
      return;
    }
    radioButtons = new View[buttons.length];
    for (int i = 0; i < buttons.length; i++) {
      final View view = buttons[i];
      view.setTag(i);
      view.setOnClickListener(this);
      radioButtons[i] = view;
    }
  }

  @Override
  public void onClick(View v) {
    setSelection((Integer) v.getTag());
  }

  public int getCheckedRadioButtonId() {
    if(mLastSelected < 0 || mLastSelected >= radioButtons.length){
      return NO_VIEW_ID;
    }
    return radioButtons[mLastSelected].getId();
  }

  public void setOnCheckedChangeListener(OnCheckedChangeListener onCheckedChangeListener) {
    this.onCheckedChangeListener = onCheckedChangeListener;
  }

  public interface OnCheckedChangeListener {
    void onCheckedChanged(int checkedId, int position);
  }
  public void setSelection(int position) {
    if (radioButtons == null || radioButtons.length <= position || position < 0) {
      return;
    }
    if(position == mLastSelected){
      return;
    }
    setCheck(radioButtons[position], true);
    if(mLastSelected >= 0 && mLastSelected < radioButtons.length){
      //set last selected pos check state > false
      setCheck(radioButtons[mLastSelected], false);
    }

    if(onCheckedChangeListener != null){
      onCheckedChangeListener.onCheckedChanged(radioButtons[position].getId(), position);
    }
    mLastSelected = position;
  }

  private void setCheck(View v, boolean checked){
    if(v instanceof RadioButton){
      ((RadioButton) v).setChecked(checked);
    }else if(v instanceof CheckBox){
      ((CheckBox) v).setChecked(checked);
    }else{
      v.setSelected(checked);
    }
  }

}