SharedPreferences保存用户偏好参数

package com.example.administrator.myapplication;

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

/**
 * Created by Administrator on 2016/5/7 0007.
 */
public class BrowserSP {
    private Context context;
    private SharedPreferences sp;
    private SharedPreferences.Editor editor;
    public BrowserSP(){}
    public BrowserSP(Context context){
        this.context=context;
        sp=this.context.getSharedPreferences("sp",Context.MODE_PRIVATE);
        editor=sp.edit();
    }
    public void save(String key,String value){
        editor.putString(key,value);
        editor.commit();
    }
    public String read(String key){
        return sp.getString(key,"");
    }
    public void remove(String key){
        editor.remove(key);
        editor.commit();
    }
    public boolean keyExists(String key){
        return sp.contains(key);
    }
}