MMKV替代sp，封装的工具类(kotlin)

喜欢ヅ旅行 2021-09-28 15:18 526阅读 0赞

使用MMKV替代SharedPreferences，

*  好处：MMKV是微信应用程序中使用的一种高效、小巧、易用的移动键值存储框架。目前在iOS、macOS、Android和Windows上都可以使用。

#### 一、在app的build.gradle中引入 ####

implementation 'com.tencent:mmkv:1.0.19'

#### 二、在application里初始化 ####

MMKV.initialize(getApplication());

#### 三、使用SpUtil如下： ####

SpUtil.INSTANCE.encode()
            SpUtil.INSTANCE.decodeStringSet()

> mmkv官方说明:  
> [https://github.com/Tencent/MMKV/wiki/android\_tutorial][https_github.com_Tencent_MMKV_wiki_android_tutorial]

--------------------

封装见完整代码如下：

object SpUtil {
        var mmkv: MMKV? = null
    
        init {
            mmkv = MMKV.defaultMMKV()
        }
    
        fun encode(key: String, value: Any?) {
            when (value) {
                is String -> mmkv?.encode(key, value)
                is Float -> mmkv?.encode(key, value)
                is Boolean -> mmkv?.encode(key, value)
                is Int -> mmkv?.encode(key, value)
                is Long -> mmkv?.encode(key, value)
                is Double -> mmkv?.encode(key, value)
                is ByteArray -> mmkv?.encode(key, value)
                is Nothing -> return
            }
        }
    
        fun <T : Parcelable> encode(key: String, t: T?) {
            if(t ==null){
                return
            }
                mmkv?.encode(key, t)
        }
    
        fun encode(key: String, sets: Set<String>?) {
            if(sets ==null){
                return
            }
            mmkv?.encode(key, sets)
        }
    
        fun decodeInt(key: String): Int? {
            return mmkv?.decodeInt(key, 0)
        }
    
        fun decodeDouble(key: String): Double? {
            return mmkv?.decodeDouble(key, 0.00)
        }
    
        fun decodeLong(key: String): Long? {
            return mmkv?.decodeLong(key, 0L)
        }
    
        fun decodeBoolean(key: String): Boolean? {
            return mmkv?.decodeBool(key, false)
        }
    
        fun decodeFloat(key: String): Float? {
            return mmkv?.decodeFloat(key, 0F)
        }
    
        fun decodeByteArray(key: String): ByteArray? {
            return mmkv?.decodeBytes(key)
        }
    
        fun decodeString(key: String): String? {
            return mmkv?.decodeString(key, "")
        }
    
        fun <T : Parcelable> decodeParcelable(key: String, tClass: Class<T>): T? {
            return mmkv?.decodeParcelable(key, tClass)
        }
    
        fun decodeStringSet(key: String): Set<String>? {
            return mmkv?.decodeStringSet(key, Collections.emptySet())
        }
    
        fun removeKey(key: String) {
            mmkv?.removeValueForKey(key)
        }
    
        fun clearAll() {
            mmkv?.clearAll()
        }
    }

[https_github.com_Tencent_MMKV_wiki_android_tutorial]: https://github.com/Tencent/MMKV/wiki/android_tutorial