游戏中简单数据存储

package com.mycompany.myapp;

import android.app.*;
import android.os.*;
import android.view.*;
import android.widget.*;
import android.content.*;
import java.util.*;

public class MainActivity extends Activity
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //获取SharedPreferences引用，存储名为feiruo.xml,读写模式为private
        //SharedPreferences sp=PreferencesManager.getDefaultSharedPreferences(this);

        SharedPreferences sp=this.getSharedPreferences("feiruo",Context.MODE_PRIVATE);
        String lasttime=sp.getString("time",null);
        if(lasttime==null){
            lasttime="你好，欢迎第一次光临";
        }else{
            lasttime="你好，上次登录时间为："+lasttime;
        }
        SharedPreferences.Editor ed=sp.edit();
        ed.putString("time",new Date().toLocaleString());
        ed.commit();//提交修改;
        TextView tv=(TextView)this.findViewById(R.id.mainTextView);
        tv.setText(lasttime);
    }
}