생천 처음 보는 오류가 났습니다... [closed]

Question

package com.again.studyenglish1;

import android.app.Activity;
import android.os.Bundle;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class WordMenu extends Activity {

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
	    setContentView(R.layout.wordmenu);
	    
	    Spinner spinner = (Spinner)findViewById(R.id.spinner);
	    ArrayAdapter<CharSequence> adapter1 = ArrayAdapter.createFromResource(this, R.array.amountofwords, android.R.layout.simple_spinner_dropdown_item);
	    adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
	    spinner.setAdapter(adapter1);
	    
	    spinner.setOnItemSelectedListener(new OnItemSelectedListener()); // 오류
	}
	
}

 

기묘한 오류가 났습니다..

마우스를 올려보니 type AdapterView.OnItemSelectedListener 를 인스턴스화할 수가 없다고 뜨는데 제가 뭘 잘못한 건지 좀 가르쳐주세요 ㅠㅠ