{"id":1235,"date":"2023-03-18T09:25:05","date_gmt":"2023-03-18T01:25:05","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1235"},"modified":"2023-04-29T09:34:03","modified_gmt":"2023-04-29T01:34:03","slug":"wechat-official-lightweight-key-value-pair-storage-framework-mmkv","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/18\/wechat-official-lightweight-key-value-pair-storage-framework-mmkv\/","title":{"rendered":"\u5fae\u4fe1\u5b98\u65b9\u8f7b\u91cf\u7ea7\u952e\u503c\u5bf9\u5b58\u50a8\u6846\u67b6MMKV"},"content":{"rendered":"

GitHub\uff1ahttps:\/\/github.com\/Tencent\/MMKV<\/a>
\nAndroid \u6587\u6863\uff1ahttps:\/\/github.com\/Tencent\/MMKV\/wiki\/android_tutorial<\/a><\/p>\n

MMKV\u4e0eSharedPreferences\u6027\u80fd\u5bf9\u6bd4\uff1a<\/p>\n

<\/p>\n

\"MMKV\u4e0eSharedPreferences\u6027\u80fd\u5bf9\u6bd4\"<\/p>\n

\u521d\u59cb\u5316MMKV<\/h2>\n

\u5728APP\u542f\u52a8\u65f6\u521d\u59cb\u5316MMKV<\/p>\n

@Override\nprotected void onCreate(Bundle savedInstanceState) {\n    super.onCreate(savedInstanceState);\n    setContentView(R.layout.activity_main);\n\n    String rootDir = MMKV.initialize(this);\n    Log.i("yezhou", "mmkv root: " + rootDir);\n    \/\/ mmkv root: \/data\/user\/0\/cn.appblog.mmkv\/files\/mmkv\n}<\/code><\/pre>\n
\u57fa\u672c\u4f7f\u7528<\/h2>\n
MMKV\u6709\u4e00\u4e2a\u9ed8\u8ba4\u5168\u5c40\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528<\/p>\n
MMKV kv = MMKV.defaultMMKV();\n\nkv.encode("bool", true);\nLog.i("yezhou", "bool: " + kv.decodeBool("bool"));\n\nkv.encode("int", Integer.MIN_VALUE);\nLog.i("yezhou", "int: " + kv.decodeInt("int"));\n\nkv.encode("long", Long.MAX_VALUE);\nLog.i("yezhou", "long: " + kv.decodeLong("long"));\n\nkv.encode("float", -3.14f);\nLog.i("yezhou", "float: " + kv.decodeFloat("float"));\n\nkv.encode("double", Double.MIN_VALUE);\nLog.i("yezhou", "double: " + kv.decodeDouble("double"));\n\nkv.encode("string", "Hello from mmkv");\nLog.i("yezhou", "string: " + kv.decodeString("string"));\n\nbyte[] bytes = {'m', 'm', 'k', 'v'};\nkv.encode("bytes", bytes);\nLog.i("yezhou", "bytes: " + new String(kv.decodeBytes("bytes")));\n\n\/\/ bool: true\n\/\/ int: -2147483648\n\/\/ long: 9223372036854775807\n\/\/ float: -3.14\n\/\/ double: 4.9E-324\n\/\/ string: Hello from mmkv\n\/\/ bytes: mmkv<\/code><\/pre>\n
\u5220\u9664\u53ca\u67e5\u8be2<\/h2>\n
MMKV kv = MMKV.defaultMMKV();\n\n\/\/ \u5220\u9664Key\u53ca\u67e5\u8be2Key\u9ed8\u8ba4\u503c\nkv.removeValueForKey("bool");\nLog.i("yezhou", "bool: " + kv.decodeBool("bool"));\n\n\/\/ \u67e5\u8be2\u6240\u6709Key\nkv.removeValuesForKeys(new String[]{"int", "long"});\nLog.i("yezhou", "allKeys: " + Arrays.toString(kv.allKeys()));\n\n\/\/ \u662f\u5426\u5305\u542bKey\nboolean hasBool = kv.containsKey("bool");\nLog.i("yezhou", "hasBool: " + hasBool);\n\n\/\/ bool: false\n\/\/ allKeys: [string, float, bytes, double]\n\/\/ hasBool: false<\/code><\/pre>\n
\u72ec\u7acb\u5b58\u50a8<\/h2>\n
\u5982\u679c\u4e0d\u540c\u7684\u6a21\u5757\/\u903b\u8f91\u9700\u8981\u72ec\u7acb\u5b58\u50a8\uff0c\u53ef\u4ee5\u521b\u5efa\u72ec\u7acb\u7684MMKV\u5b9e\u4f8b<\/p>\n
MMKV mmkv = MMKV.mmkvWithID("user");\nmmkv.encode("user_id", 100);\nLog.i("yezhou", "UserId: " + mmkv.decodeInt("user_id"));<\/code><\/pre>\n
\u5982\u679c\u9700\u8981\u652f\u6301\u591a\u8fdb\u7a0b\u8bbf\u95ee\uff0c\u53ef\u4ee5\u5728MMKV\u521d\u59cb\u5316\u65f6\u8bbe\u7f6e MMKV.MULTI_PROCESS_MODE<\/code><\/p>\n
MMKV mmkv = MMKV.mmkvWithID("share", MMKV.MULTI_PROCESS_MODE);\nmmkv.encode("bool", true);<\/code><\/pre>\n
\u652f\u6301\u6570\u636e\u7c7b\u578b<\/h2>\n
\u57fa\u672c\u7c7b\u578b\uff1a<\/p>\n
boolean\u3001int\u3001long\u3001float\u3001double\u3001byte[]<\/code><\/pre>\n
\u7c7b\u53ca\u96c6\u5408\uff1a<\/p>\n
String\u3001Set<String><\/code><\/pre>\n
\u4eceSharedPreferences\u8fc1\u79fb<\/h2>\n
\u53c2\u8003\uff1ahttps:\/\/github.com\/Tencent\/MMKV\/wiki\/android_tutorial#migrating-from-sharedpreferences<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
GitHub\uff1ahttps:\/\/github.com\/Tencent\/MMKV Android \u6587\u6863\uff1ahttps […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[205],"tags":[309],"class_list":["post-1235","post","type-post","status-publish","format-standard","hentry","category-android-database-library","tag-mmkv"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1235"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1235\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}