Android使用Sharedpreference共享参数

import java.util.HashMap;
import java.util.Map;
import android.content.Context;
import android.content.SharedPreferences;
public class MySharedpreference {
    private Context context;
    public MySharedpreference(Context context) {
        // TODO Auto-generated constructor stub
        this.context = context;
    }
    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 editor = sharedPreferences.edit();
        editor.putString("name", name);
        editor.putString("pswd", pswd);
        flag = editor.commit();// 将数据持久化到存储介质中
        return flag;
    }
    public Map getMessage() {
        Map map = new HashMap();
        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;
    }
}