{"id":92,"date":"2014-08-21T23:41:07","date_gmt":"2014-08-21T15:41:07","guid":{"rendered":"http:\/\/www.yarpee.com\/?p=92"},"modified":"2014-08-21T23:41:07","modified_gmt":"2014-08-21T15:41:07","slug":"saving-data","status":"publish","type":"post","link":"http:\/\/www.yarpee.cn\/?p=92","title":{"rendered":"Saving Data"},"content":{"rendered":"

\u5982\u679c\u53ea\u662f\u5b58\u50a8\u76f8\u5bf9\u8f83\u5c0f\u7684key-values\u5e94\u8be5\u4f7f\u7528SharedPreferences APIs\u3002\u4e00\u4e2aSharedPreferences\u5bf9\u8c61\u6307\u5411\u4e00\u4e2a\u5305\u542bkey-value pairs\u7684\u6587\u4ef6\u5e76\u63d0\u4f9b\u4e86\u76f8\u5e94\u7684\u8bfb\u5199\u65b9\u6cd5\u3002\u800c\u6bcf\u4e2aSharedPreferences\u6587\u4ef6\u5219\u7531\u6846\u67b6\u7ba1\u7406\u5e76\u4e14\u80fd\u6307\u5b9a\u4e3a\u72ec\u5360\u7684\u6216\u5171\u4eab\u7684\u3002
\n\u83b7\u53d6\u4e00\u4e2aSharedPreferences\u53e5\u67c4\uff1a
\ngetSharedPreferences()\uff1a\u5982\u679c\u60f3\u901a\u8fc7\u540d\u5b57\u83b7\u53d6\u591a\u4e2aSharedPreferences\u6587\u4ef6\u5219\u4f7f\u7528\u8be5API\u3002
\ngetPreferences()\uff1a\u5982\u679c\u53ea\u60f3\u83b7\u53d6\u4e00\u4e2aSharedPreferences\u5219\u4f7f\u7528\u8be5API\u3002
\n\u6807\u8bc6Context.MODE_PRIVATE\u3001MODE_WORLD_READABLE\u3001MODE_WORLD_WRITEABLE\u5206\u522b\u8868\u793aSharedPreferences\u6587\u4ef6\u5141\u8bb8\u4ee5\u72ec\u5360\u3001\u5171\u4eab\u8bfb\u3001\u5171\u4eab\u5199\u7684\u6743\u9650\u8bbf\u95ee\u3002<\/p>\n

\u5982\u679c\u662f\u5927\u91cf\u987a\u5e8f\u8bfb\u5199\u7684\u6570\u636e\u5e94\u8be5\u4f7f\u7528File\u3002\u6240\u6709\u7684Android\u8bbe\u5907\u5747\u6709\u5185\u90e8\u548c\u5916\u90e8\u4e24\u4e2a\u5b58\u50a8\u533a\u57df\uff0c\u8fd9\u662f\u5386\u53f2\u539f\u56e0\uff0c\u5373\u4f7f\u6709\u4e9b\u8bbe\u5907\u6ca1\u6709\u53ef\u79fb\u52a8\u7684\u5b58\u50a8\uff0c\u5176\u56fa\u5b9a\u5b58\u50a8\u4e5f\u4f1a\u88ab\u5206\u4e3a\u5185\u90e8\u548c\u5916\u90e8\u4e24\u4e2a\u5b58\u50a8\u533a\u57df\u3002
\nInternal Storage\uff1a
\n1\u3001\u603b\u662f\u53ef\u7528\u3002
\n2\u3001\u4f60\u7684app\u5b58\u50a8\u7684\u6587\u4ef6\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u53ea\u80fd\u4f60\u81ea\u5df1\u8bbf\u95ee\u3002
\n3\u3001\u5f53\u7528\u6237\u5378\u8f7d\u4f60\u7684app\u65f6\u5168\u90e8\u6587\u4ef6\u90fd\u4f1a\u88ab\u5220\u9664\u3002
\n\u5f53\u4f60\u4e0d\u60f3\u7528\u6237\u6216\u5176\u5b83app\u8bbf\u95ee\u4f60\u7684\u6587\u4ef6\u65f6\u5185\u90e8\u5b58\u50a8\u662f\u6700\u597d\u7684\u9009\u62e9\u3002
\nExternal Storage\uff1a
\n1\u3001\u5e76\u4e0d\u603b\u662f\u53ef\u7528\uff0c\u56e0\u4e3a\u7528\u6237\u53ef\u4ee5\u6302\u8f7d\u4e00\u4e2aUSB\u5b58\u50a8\u6765\u4f5c\u4e3a\u5916\u90e8\u5b58\u50a8\u4e5f\u80fd\u79fb\u9664\u3002
\n2\u3001\u5168\u5c40\u53ef\u8bbf\u95ee\u3002
\n3\u3001\u5f53\u7528\u6237\u5378\u8f7d\u4f60\u7684app\u65f6\u5b58\u5728getExternalFilesDir()\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\u4e5f\u4f1a\u88ab\u5220\u9664\u3002
\n\u5f53\u6587\u4ef6\u4e0d\u9700\u8981\u8bbf\u95ee\u6743\u9650\u6216\u9700\u8981\u5171\u4eab\u65f6\u5916\u90e8\u5b58\u50a8\u662f\u6700\u597d\u7684\u9009\u62e9\u3002
\n\u5199\u5916\u90e8\u5b58\u50a8\u9700\u8981\u5728manifest\u4e2d\u6307\u660eWRITE_EXTERNAL_STORAGE\u6743\u9650\u3002
\nSaving a File On Internal Storage\uff1a
\ngetFilesDir()\uff1a\u8fd4\u56de\u4e00\u4e2a\u4ee3\u8868\u4f60app\u5185\u90e8\u5b58\u50a8\u76ee\u5f55\u7684File\u3002
\ngetCacheDir()\uff1a\u8fd4\u56de\u4e00\u4e2a\u4ee3\u8868\u4f60app\u5185\u90e8\u5b58\u50a8\u4e34\u65f6\u76ee\u5f55\u7684File\u3002\u6ce8\u610f\u8981\u53ca\u65f6\u5220\u9664\u8fd9\u91cc\u7684\u6587\u4ef6\u3002
\nSaving a File On External Storage\uff1a
\ngetExternalStorageState()\uff1a\u5224\u65ad\u5916\u90e8\u5b58\u50a8\u662f\u5426\u53ef\u7528\u3002
\ngetExternalStoragePublicDirectory()\uff1a\u8fd4\u56de\u4e00\u4e2a\u4ee3\u8868\u4f60app\u5916\u90e8\u5b58\u50a8\u516c\u7528\u76ee\u5f55\u7684File\uff0c\u4f60app\u5378\u8f7d\u65f6\u5176\u4e2d\u7684\u6587\u4ef6\u4e0d\u4f1a\u88ab\u5220\u9664\u3002
\ngetExternalFilesDir()\uff1a\u8fd4\u56de\u4e00\u4e2a\u4ee3\u8868\u4f60app\u5916\u90e8\u5b58\u50a8\u79c1\u6709\u76ee\u5f55\u7684File\uff0c\u4f60app\u5378\u8f7d\u65f6\u5176\u4e2d\u7684\u6587\u4ef6\u4e5f\u4f1a\u88ab\u5220\u9664\u3002<\/p>\n

Saving Data in SQL Databasees\uff1aSQLiteOpenHelper\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5982\u679c\u53ea\u662f\u5b58\u50a8\u76f8\u5bf9\u8f83\u5c0f\u7684key-values\u5e94\u8be5\u4f7f\u7528SharedPreferences APIs\u3002\u4e00\u4e2aShare … <\/p>\n

\u7ee7\u7eed\u9605\u8bfb\u201cSaving Data\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-92","post","type-post","status-publish","format-standard","hentry","category-android"],"_links":{"self":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/posts\/92"}],"collection":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=92"}],"version-history":[{"count":1,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/posts\/92\/revisions"}],"predecessor-version":[{"id":93,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=\/wp\/v2\/posts\/92\/revisions\/93"}],"wp:attachment":[{"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=92"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=92"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yarpee.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=92"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}