使用SharedPreference保存一些简单的信息

package com.example.testsharedpreference;

import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.content.SharedPreferences;

public class MyPreference {

    private Context context;

    public MyPreference(Context context) {
        this.context = context;
    }

    /**
     * 保存信息 （保存位置：“/data/data/应用程序包/shared_prefs”）
     * @param name
     * @param pswd
     * @return
     */
    public boolean saveMessage(String name, String pswd) {
        boolean flag = false;
        SharedPreferences sharedPreferences = context.getSharedPreferences(
                "userinfo", Context.MODE_PRIVATE);
        //对数据进行编辑
        SharedPreferences.Editor edit = sharedPreferences.edit();
        edit.putString("name", name);
        edit.putString("pswd", pswd);
        //将数据持久化到存储介质当中
        edit.commit();
        return flag;
    }

    /**
     * @return    以map形式返回一些存储的信息
     */
    public Map<String, String> getMessage() {
        Map<String, String> map = new HashMap<String, String>();
        SharedPreferences sharedPreferences = context.getSharedPreferences(
                "userinfo", Context.MODE_PRIVATE);
        String name = sharedPreferences.getString("name", "");
        String pswd = sharedPreferences.getString("pswd", "");
        map.put("name", name);
        map.put("pswd", pswd);
        return map;
    }
}