创建ListView,上下文菜单报错，新手求解?报错

package com.example.wuliuhome;

import java.util.ArrayList;
import java.util.List;

import android.R.string;
import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class NewsActivity extends Activity {
	private ListView listView;
	private ArrayAdapter<string> adapter;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.newsadmin);
		listView = (ListView)this.findViewById(R.id.listView1);
		adapter= new ArrayAdapter<string>(this, android.R.layout.simple_list_item_1, getData());
		listView.setAdapter(adapter);
		registerForContextMenu(listView);
	}
	public List<string> getData(){
		List<string> list = new ArrayList<string>();
		for(int i=0; i<10; i++){
		list.add("jack" + i);			
		}
		return list;
	}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
		ContextMenuInfo menuInfo) {
	// TODO Auto-generated method stub
	getMenuInflater().inflate(R.menu.news, menu);
	super.onCreateContextMenu(menu, v, menuInfo);
}
//@Override
//public boolean onCreateOptionsMenu(Menu menu) {
//	// TODO Auto-generated method stub
//	getMenuInflater().inflate(R.menu.news, menu);
//	return true;
//}
}

list.add("jack" + i);

    错误提示：The method add(R.string) in the type List<R.string> is not applicable for the arguments (String)

新手求解
最终要是这样的效果