Android应用开发SharedPreferences存储数据的使用方法

Posted 2020-08-17 ecollab

SharedPreferences是android中最容易理解的数据存储技术，实际上SharedPreferences处理的就是一个key-value（键值对）SharedPreferences常用来存储一些轻量级的数据。

 使用SharedPreferences保存数据，其背后是用xml文件存放数据，文件存放在/data/data/<package name>/shared_prefs目录下

/**
 * 对SharePreference的封装
 * 
 * @author Kevin
 * 
 */
public class PrefUtils {

    public static void putBoolean(String key, boolean value, Context ctx) {
        SharedPreferences sp = ctx.getSharedPreferences("config",
                Context.MODE_PRIVATE);
        sp.edit().putBoolean(key, value).commit();
    }

    public static boolean getBoolean(String key, boolean defValue, Context ctx) {
        SharedPreferences sp = ctx.getSharedPreferences("config",
                Context.MODE_PRIVATE);
        return sp.getBoolean(key, defValue);
    }

    public static void putString(String key, String value, Context ctx) {
        SharedPreferences sp = ctx.getSharedPreferences("config",
                Context.MODE_PRIVATE);
        sp.edit().putString(key, value).commit();
    }

    public static String getString(String key, String defValue, Context ctx) {
        SharedPreferences sp = ctx.getSharedPreferences("config",
                Context.MODE_PRIVATE);
        return sp.getString(key, defValue);
    }

    public static void putInt(String key, int value, Context ctx) {
        SharedPreferences sp = ctx.getSharedPreferences("config",
                Context.MODE_PRIVATE);
        sp.edit().putInt(key, value).commit();
    }

    public static int getInt(String key, int defValue, Context ctx) {
        SharedPreferences sp = ctx.getSharedPreferences("config",
                Context.MODE_PRIVATE);
        return sp.getInt(key, defValue);
    }

    public static void remove(String key, Context ctx) {
        SharedPreferences sp = ctx.getSharedPreferences("config",
                Context.MODE_PRIVATE);
        sp.edit().remove(key).commit();
    }
}

View Code

 PrefUtils.putBoolean("is_guide_show", true, this);

 

// 判断是否需要跳到新手引导
boolean isGuideShow = PrefUtils.getBoolean("is_guide_show",
false, getApplicationContext());