SharedPreferences使用

其他代码同,QQ登录

<span style="font-size:14px;">package com.itheima28.qqlogin.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Environment;
import android.text.TextUtils;

public class UtilsOfSharePreferences {
  /**
   * 保存用户信息到sd卡
   * */
  public static boolean saveUserInfo(Context context,String number,String password){
    
    try {
      //    /data/data/包名/shared_prefs/ithmima28
      SharedPreferences sp = context.getSharedPreferences("ithmima28", Context.MODE_PRIVATE);
      
      //获得一个编辑对象
      Editor edit = sp.edit();
      
      //存数据
      edit.putString("number", number);
      edit.putString("password", password);
      
      //提交数据，真正存储起来了
      edit.commit();
      return true;
    } catch (Exception e) {
      e.printStackTrace();
    }
    return false;
  }
  
  /**
   *  到sd卡获取用户信息
   * */
   public static Map<String,String> getUserInfo(Context context){
     
     SharedPreferences sp = context.getSharedPreferences("ithmima28", Context.MODE_PRIVATE);
     
     String number = sp.getString("number", null);
     String password = sp.getString("password", null); 
     
     if(!TextUtils.isEmpty(number) && !TextUtils.isEmpty(number)){
       Map<String,String> userInfoMap = new HashMap<String, String>();
       userInfoMap.put("number", number);
       userInfoMap.put("password", password);
       return userInfoMap;
     }
     
     return null;
  }
}</span>