{"id":850,"date":"2017-11-12T17:00:16","date_gmt":"2017-11-12T09:00:16","guid":{"rendered":"https:\/\/www.ray650128.com\/wordpress\/?p=240"},"modified":"2021-09-05T13:04:30","modified_gmt":"2021-09-05T05:04:30","slug":"androidsharepreference","status":"publish","type":"post","link":"https:\/\/blog.ray650128.com\/?p=850","title":{"rendered":"[Android]SharedPreferences"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728Android\u7684\u61c9\u7528\u7a0b\u5f0f\u4e2d\uff0c\u5982\u679c\u60f3\u8981\u5132\u5b58\u8cc7\u6599\u7684\u8a71\uff0c\u4e00\u822c\u53ef\u4ee5\u900f\u904e\u8cc7\u6599\u5eab\u7684\u65b9\u5f0f\u4f86\u5132\u5b58\u8cc7\u6599\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u5982\u679c\u5132\u5b58\u7684\u8cc7\u6599\u662f\u975e\u5e38\u7c21\u55ae\u7684\uff0c\u4f8b\u5982\uff1a\u5e33\u865f\u3001\u61c9\u7528\u7a0b\u5f0f\u7684\u8a2d\u5b9a\u503c\u7b49\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528SharedPreferences\u985e\u5225\u4f86\u5132\u5b58\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> SharedPreferences\u662fAndroid\u7684\u4e00\u500b\u4ecb\u9762\uff0c\u53ef\u4ee5\u5728Activity\u3001Service\u7b49\u985e\u5225\u4e2d\u547c\u53ebgetSharedPreferences(String, Int)\u65b9\u6cd5\u4f86\u53d6\u5f97\u7269\u4ef6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\u7b2c\u4e00\u500b\u53c3\u6578\u4ee3\u8868\u8a2d\u5b9a\u6a94\u7684\u540d\u7a31\uff0c\u4ee5\u5b57\u4e32\u578b\u5225\u8868\u793a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u500b\u53c3\u6578\u5247\u4ee3\u8868\u8a2d\u5b9a\u6a94\u7684\u5b58\u53d6\u6b0a\u9650\uff0c\u4ee5Int\u578b\u5225\u8868\u793a\u3002\u81f3\u65bc\u6b0a\u9650\uff0c\u5247\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Context.MODE_PRIVATE\uff1a\u53ea\u5141\u8a31\u9019\u500b\u61c9\u7528\u7a0b\u5f0f\u5b58\u53d6<\/li><li>Context.MODE_MULTI_PROCESS\uff1a\u5141\u8a31\u591a\u500b\u884c\u7a0b(Process)\u540c\u6642\u5b58\u53d6\u9019\u500b\u8a2d\u5b9a\u6a94<\/li><li>Context.MODE_WORLD_READABLE\uff1a\u5141\u8a31\u6240\u6709\u7684APP\u90fd\u80fd\u8b80\u53d6\u9019\u500b\u8a2d\u5b9a\u6a94<\/li><li>Context.MODE_WORLD_WRITEABLE\uff1a\u5141\u8a31\u6240\u6709\u7684APP\u90fd\u80fd\u8b80\u53d6\u3001\u5beb\u5165\u9019\u500b\u8a2d\u5b9a\u6a94<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u6700\u5e38\u4f7f\u7528\u7684\u6b0a\u9650\u5c31\u662fContext.MODE_PRIVATE\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u81f3\u65bcContext.MODE_WORLD_READABLE\u548cContext.MODE_WORLD_WRITEABLE\uff0c\u56e0\u70ba\u98a8\u96aa\u6027\u592a\u9ad8\uff0c\u6240\u4ee5\u5b98\u65b9\u5728API 17\u958b\u59cb\u5c31\u4e0d\u5efa\u8b70\u4f7f\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u5916\uff0cSharedPreferences\u53ef\u4ee5\u5132\u5b58\u7684\u8cc7\u6599\u578b\u5225\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>boolean<\/li><li>Float<\/li><li>Int<\/li><li>Long<\/li><li>String<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u8b80\u53d6\u8cc7\u6599\u90e8\u5206\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">val mPreferences = getSharedPreference(\"LOGIN_DATA\", Context.MODE_PRIVATE)\n\n\/\/\u8b80\u53d6\u8cc7\u6599\nval savedUsername = mPreferences.getString(\"USER_NAME\", \"\")<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b58\u5165\u8cc7\u6599\u90e8\u5206\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">val mPreferences = getSharedPreference(\"LOGIN_DATA\", Context.MODE_PRIVATE)\n\n\/\/\u5b58\u5165\u8cc7\u6599\nmPreferences.edit().putString(\"USER_NAME\", \"abcd1234\").apply()<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u522a\u9664\u8cc7\u6599\u90e8\u5206\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">val mPreferences = getSharedPreference(\"LOGIN_DATA\", Context.MODE_PRIVATE)\n\n\/\/\u522a\u9664\nmPreferences.edit().remove(\"USER_NAME\").apply()<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u984d\u5916\u88dc\u5145<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\u6211\u6703\u70ba\u4e86\u589e\u52a0\u8907\u7528\u6027\uff0c\u4f7f\u7528\u55ae\u4f8b\u5c01\u88dd\uff0c\u8b93\u6240\u6709\u7684\u985e\u5225\u90fd\u80fd\u547c\u53eb\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"kotlin\" class=\"language-kotlin line-numbers\">object AppSetting {\n    private val pref = MyApplication.getAppContext().\ngetSharedPreference(\"APP_DATA\", Context.MODE_PRIVATE)\n\n    var userName: String\n        get() = pref.getString(\"USER_NAME\", \"\")\n        set(value) = pref.edit().putString(\"USER_NAME\", value).apply()\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Android\u7684\u61c9\u7528\u7a0b\u5f0f\u4e2d\uff0c\u5982\u679c\u60f3\u8981\u5132\u5b58\u8cc7\u6599\u7684\u8a71\uff0c\u4e00\u822c\u53ef\u4ee5\u900f\u904e\u8cc7\u6599\u5eab\u7684\u65b9\u5f0f\u4f86\u5132\u5b58\u8cc7\u6599\u3002 \u4f46\u5982\u679c\u5132\u5b58\u7684\u8cc7\u6599\u662f\u975e &hellip; <\/p>\n","protected":false},"author":1,"featured_media":299,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[32],"class_list":["post-850","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2","tag-32"],"_links":{"self":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=850"}],"version-history":[{"count":2,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/850\/revisions"}],"predecessor-version":[{"id":1129,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/850\/revisions\/1129"}],"wp:attachment":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}