{"id":364,"date":"2021-07-01T14:36:12","date_gmt":"2021-07-01T06:36:12","guid":{"rendered":"https:\/\/www.iotot.com\/?p=364"},"modified":"2022-05-22T11:23:39","modified_gmt":"2022-05-22T03:23:39","slug":"android-%e6%96%87%e4%bb%b6%e7%b3%bb%e7%bb%9f%e4%b8%8eandroid11-%e5%88%86%e5%8c%ba%e5%ad%98%e5%82%a8","status":"publish","type":"post","link":"https:\/\/blog.iotot.com\/?p=364","title":{"rendered":"Android &#8211; \u6587\u4ef6\u7cfb\u7edf\u4e0eAndroid11 \u5206\u533a\u5b58\u50a8"},"content":{"rendered":"\n<h5>\u8ba4\u8bc6Android\u6587\u4ef6\u7cfb\u7edf<\/h5>\n\n\n\n<h5>*\u4e86\u89e3\u5206\u533a\u5b58\u50a8<\/h5>\n\n\n\n<h5>*\u5206\u533a\u5b58\u50a8\u7684\u9002\u914d<\/h5>\n\n\n\n<h2>\u4e00\u3001Android\u6587\u4ef6\u7cfb\u7edf<\/h2>\n\n\n\n<p>Android\u6587\u4ef6\u7cfb\u7edf\u5206\u4e3a <strong>\u5185\u90e8\u5b58\u50a8\uff08internal storage\uff09<\/strong> \u548c<strong>\u5916\u90e8\u5b58\u50a8(external storage)<\/strong><\/p>\n\n\n\n<p>1.1 \u7528\u4e00\u4e2a\u8868\u683c\u6765\u76f4\u89c2\u5bf9\u6bd4\u4e00\u4e0b\u4e24\u8005\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"656\" src=\"https:\/\/www.iotot.com\/wp-content\/uploads\/2021\/07\/16251213031-1024x656.png\" alt=\"\" class=\"wp-image-366\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/16251213031-1024x656.png 1024w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/16251213031-300x192.png 300w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/16251213031-768x492.png 768w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/16251213031-1536x984.png 1536w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/16251213031-624x400.png 624w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/16251213031.png 1776w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>1.2 \u5e94\u7528\u7684\u79c1\u6709\u8def\u5f84<\/p>\n\n\n\n<p>\u5e94\u7528\u5728\u5b89\u88c5\u4e4b\u540e\uff0c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5728\u5185\u90e8\u5b58\u50a8\u548c\u5916\u90e8\u5b58\u50a8\uff0c\u5206\u522b\u5efa\u7acb\u5e94\u7528\u7684\u79c1\u6709\u5b58\u50a8\u533a\u57df\u3002<\/p>\n\n\n\n<p>\u5185\u90e8\u5b58\u50a8 \uff1a data\/user\/0\/packageName<br>\u5916\u90e8\u5b58\u50a8 \uff1a storage\/emulated\/0\/android\/data\/packageName<\/p>\n\n\n\n<p>\u5f53\u5e94\u7528\u5378\u8f7d\u6216\u8005\u6e05\u9664\u6570\u636e\u540e\uff0c\u8be5\u533a\u57df\u6587\u4ef6\u4f1a\u88ab\u5220\u9664\u3002<\/p>\n\n\n\n<p>1.3 \u5185\u5916\u90e8\u5b58\u50a8\u56fe\u89e3<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"400\" src=\"https:\/\/www.iotot.com\/wp-content\/uploads\/2021\/07\/image-3-1024x400.png\" alt=\"\" class=\"wp-image-368\" srcset=\"https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/image-3-1024x400.png 1024w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/image-3-300x117.png 300w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/image-3-768x300.png 768w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/image-3-1536x600.png 1536w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/image-3-624x244.png 624w, https:\/\/blog.iotot.com\/wp-content\/uploads\/2021\/07\/image-3.png 1542w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>storage2.png<\/p>\n\n\n\n<h2>\u4e8c\u3001 \u4e86\u89e3\u5206\u533a\u5b58\u50a8<\/h2>\n\n\n\n<p>Android 10\u7248\u672c\u4e2d\uff0cGoogle\u63a8\u51fa <strong>\u5206\u533a\u5b58\u50a8<\/strong>\uff08scoped storage\uff09\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n<p><strong>\u80cc\u666f<\/strong>\uff1a<br>\u5206\u533a\u5b58\u50a8\u529f\u80fd\u662f\u9488\u5bf9\u5185\u7f6e\u7684\u5916\u90e8\u5b58\u50a8\u6765\u8bf4\u7684\uff0c\u5f88\u591a\u5e94\u7528\u559c\u6b22\u5728\u5916\u90e8\u5b58\u50a8\u7684\u6839\u76ee\u5f55\u521b\u5efa\u81ea\u5df1\u7684\u6587\u4ef6\u5939\uff0c\u6bd4\u5982\uff1astorage\/emulated\/0\/***<\/p>\n\n\n\n<p>\u8fd9\u6837\u505a\u7684\u597d\u5904\uff1a1. \u5f53\u4e0d\u65ad\u5411\u8be5\u76ee\u5f55\u5b58\u50a8\u65f6\uff0c\u5e94\u7528\u81ea\u5df1\u7684\u5bb9\u91cf\u4e0d\u4f1a\u53d8\u5316\uff1b 2. \u5f53\u5e94\u7528\u5378\u8f7d\u65f6\uff0c\u8be5\u76ee\u5f55\u4e0b\u6587\u4ef6\u4e0d\u4f1a\u88ab\u5220\u9664\uff0c\u53ef\u7528\u4e8e\u4fdd\u5b58\u4e00\u4e9b\u53ef\u6301\u4e45\u6027\u7684\u6587\u4ef6\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\u4e5f\u6709\u574f\u5904\uff1a 1. \u5bf9\u7528\u6237\u6765\u8bf4\uff0c\u4f1a\u6709\u5f88\u591a\u5783\u573e\u6587\u4ef6\u5b58\u5728\u4e8e\u624b\u673a\u4e2d\uff1b2. \u53ea\u8981\u83b7\u53d6\u5230Read \u548c Write\u6743\u9650\uff0c\u5c31\u53ef\u4ee5\u968f\u610f\u8bbf\u95ee\u5916\u90e8\u5b58\u50a8\u7684\u4efb\u4f55\u76ee\u5f55\uff0c\u4fe1\u606f\u5b89\u5168\u5b58\u5728\u9690\u60a3\u3002<\/p>\n\n\n\n<p><strong>\u5206\u533a\u5b58\u50a8<\/strong>\uff1a<\/p>\n\n\n\n<ol><li>\u6bcf\u4e2a\u5e94\u7528\u5411\u81ea\u5df1\u7684\u79c1\u6709\u76ee\u5f55\u8bfb\u5199\u6587\u4ef6\uff0c\u4e0d\u9700\u8981\u8bfb\u5199\u6743\u9650\u3002\u79c1\u6709\u6587\u4ef6\u76ee\u5f55\u5177\u4f53\u8def\u5f84\uff1a storage\/emulated\/0\/android\/data\/packageName\/ \uff0c\u83b7\u53d6\u65b9\u6cd5\uff1a Context#getExternalFilesDir()<\/li><li>\u5e94\u7528\u5373\u4f7f\u83b7\u53d6\u4e86\u8bfb\u5199\u6743\u9650\uff0c\u4e5f\u65e0\u6cd5\u8bbf\u95ee\u5176\u4ed6\u5e94\u7528\u7684\u79c1\u6709\u76ee\u5f55\u3002<\/li><li>\u5f53\u5e94\u7528\u9700\u8981\u83b7\u53d6\u5a92\u4f53\u6587\u4ef6\u65f6\uff0c\u901a\u8fc7 <strong>MediaStore API<\/strong> \u5411\u516c\u5171\u5b58\u50a8\u76ee\u5f55DCIM\u3001Music\u6216\u8005Movie\u83b7\u53d6\u3002\u540c\u6837\u5199\u5a92\u4f53\u6587\u4ef6\u4e5f\u662f\u5982\u6b64\u3002\u5e76\u4e14\u8bfb\u5199\u81ea\u5df1\u7684\u6587\u4ef6\u65f6\u4e0d\u9700\u8981\u7533\u8bf7\u6743\u9650\u3002 \u53ea\u6709\u8bfb\u5176\u4ed6\u5e94\u7528\u7684\u5a92\u4f53\u6587\u4ef6\u65f6\u624d\u4f1a\u9700\u8981\u7533\u8bf7READ_EXTERNAL_STORAGE\u6743\u9650\u3002<br>(\u66f4\u65b0\uff1aAndroid11\u4e3a\u76ee\u6807\u5e73\u53f0\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6587\u4ef6\u76f4\u63a5\u8def\u5f84\u53bb\u8bbf\u95ee\u5a92\u4f53\uff0c\u8fd9\u662f\u5728Android10\u4e0a\u6ca1\u6709\u7684\uff0c\u5e94\u7528\u7684\u6027\u80fd\u4f1a\u7565\u6709\u4e0b\u964d\uff0c\u8fd8\u662f\u63a8\u8350\u4f7f\u7528MediaStore )<\/li><li>\u5f53\u5e94\u7528\u9700\u8981\u83b7\u53d6\u5176\u4ed6\u975e\u5a92\u4f53\u6587\u4ef6\u65f6\uff0c\u6bd4\u5982doc\u3001pdf\u6587\u4ef6\uff0c\u9700\u8981\u4f7f\u7528 <strong>\u7cfb\u7edf\u7684\u6587\u4ef6\u9009\u62e9\u5668SAF<\/strong> \u6765\u8fdb\u884c\u8bbf\u95ee\u3002<\/li><li>\u6240\u4ee5WRITE_EXTERNAL_STORAGE\u6743\u9650\uff0c\u5728\u672a\u6765\u7684Android11\u7248\u672c\u91cc\uff0c\u4f1a\u88ab\u5e9f\u5f03\u3002 \uff08\u5199\u6587\u4ef6\u4e0d\u9700\u8981\u6743\u9650\uff0c\u53ea\u80fd\u5728\u79c1\u6709\u76ee\u5f55\u548c\u516c\u5171\u76ee\u5f55\u5199\u6587\u4ef6\uff09<\/li><\/ol>\n\n\n\n<h2>\u4e09\u3001\u5206\u533a\u5b58\u50a8\u9002\u914d<\/h2>\n\n\n\n<h5>\u65e7\u7248\u5b58\u50a8\u4f4d\u7f6e\u8fc1\u79fb<\/h5>\n\n\n\n<p>\u9664\u4e86\u5e94\u7528\u7684\u79c1\u6709\u76ee\u5f55\u548c\u516c\u5171\u76ee\u5f55\uff0c\u5176\u4ed6\u4f4d\u7f6e\u90fd\u79f0\u4e3a <strong>\u65e7\u7248\u5b58\u50a8\u4f4d\u7f6e<\/strong>\uff0c\u6211\u4eec\u9700\u8981\u5c06\u65e7\u7248\u5b58\u50a8\u4f4d\u7f6e\u7684\u6570\u636e\u8fc1\u79fb\u5230\u80fd\u517c\u5bb9\u5206\u533a\u5b58\u50a8\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<ol><li>\u5982\u679c\u4ee5Android 11\u4e3a\u76ee\u6807\u5e73\u53f0\u7684\u5e94\u7528\uff0c\u9700\u8981\u5728manifest\u6e05\u5355\u4e2d\u6807\u8bb0<strong>preserveLegacyExternalStorage<\/strong> \u4e3atrue\uff0c\u8fd9\u6837\u5728Android11\u7684\u673a\u5668\u4e0a<strong>\u8986\u76d6\u5b89\u88c5<\/strong>\u65f6\uff0c\u624d\u80fd\u8bbf\u95ee\u65e7\u7248\u5b58\u50a8\u4f4d\u7f6e\uff0c\u5378\u8f7d\u91cd\u88c5\u4f1a\u5931\u6548\u3002<\/li><li>\u5982\u679c\u4ee5Android10\u4e3a\u76ee\u6807\u5e73\u53f0\uff0c\u8986\u76d6\u5b89\u88c5\u53ef\u4ee5\u8bbf\u95ee\u65e7\u7248\u5b58\u50a8\uff0c\u4e14\u5c06manifest\u6e05\u5355\u4e2d\u6807\u8bb0<strong>requestLegacyExternalStorage<\/strong> \u4e3atrue\uff0c\u5728Android10\u673a\u5668\u4e0a<strong>\u91cd\u65b0\u5b89\u88c5<\/strong>\u4e5f\u80fd\u8bbf\u95ee\u65e7\u7248\u5b58\u50a8\u4f4d\u7f6e\u3002\u5728Android11\u7684\u673a\u5668\u4e0a\u4e24\u79cd\u5b89\u88c5\u65b9\u5f0f\u90fd\u4f1a\u5931\u6548\uff0c\u9700\u8981\u52a0\u4e0apreserveLegacyExternalStorage = true\uff0c\u4e14<strong>\u8986\u76d6\u5b89\u88c5<\/strong>\u624d\u80fd\u8bbf\u95ee\u65e7\u7248\u5b58\u50a8\u4f4d\u7f6e\u3002\u5378\u8f7d\u91cd\u88c5\u4f1a\u5931\u6548\u3002<\/li><li>\u5982\u679c\u4ee5Android 9\u53ca\u4ee5\u4e0b\u4e3a\u76ee\u6807\u5e73\u53f0\u65f6\uff0c\u5c31\u80fd\u6b63\u5e38\u7684\u8fdb\u884c\u6587\u4ef6\u79fb\u52a8\u3002\u5c06\u5e94\u7528\u5728\u5916\u90e8\u5b58\u50a8\u5668\u6839\u76ee\u5f55\u7684\u4fdd\u5b58\u7684\u6570\u636e\u4e2d\uff0c\u5982\u679c\u80fd\u63a5\u53d7\u968f\u5e94\u7528\u7684\u5378\u8f7d\u800c\u5220\u9664\u7684\u6587\u4ef6\uff0c\u8fc1\u79fb\u81f3storage\/emulated\/0\/android\/data\/packageName\/\u76ee\u5f55\u4e0b\u3002\u9700\u8981\u548c\u5176\u4ed6\u5e94\u7528\u5171\u4eab\u7684\u5a92\u4f53\u6587\u4ef6\uff0c\u8fc1\u79fb\u81f3\u5a92\u4f53\u5b58\u50a8\u4f4d\u7f6e\u3002<\/li><\/ol>\n\n\n\n<h5>\u6b63\u786e\u4f7f\u7528\u8bfb\u5199API<\/h5>\n\n\n\n<ol><li>\u53ea\u5728\u5916\u90e8\u5b58\u50a8\u7684\u5e94\u7528\u79c1\u6709\u76ee\u5f55\u4e0b\uff0c\u7528\u76f4\u63a5\u8def\u5f84\u8bfb\u5199\u6587\u4ef6<\/li><li>\u8bbf\u95ee\u6216\u8005\u5171\u4eab\u5a92\u4f53\u6587\u4ef6\uff0c\u4f7f\u7528MediaStore\u5728\u516c\u5171\u76ee\u5f55\u4e0b\u8bfb\u5199\u6587\u4ef6<\/li><li>\u8bbf\u95ee\u6216\u8005\u5171\u4eab\u975e\u5a92\u4f53\u6587\u4ef6\uff0c\u4f7f\u7528\u7cfb\u7edf\u7684\u6587\u4ef6\u9009\u62e9\u5668SAF\u5728\u516c\u5171\u76ee\u5f55Download\u4e0b\u8bfb\u5199\u6587\u4ef6<\/li><\/ol>\n\n\n\n<p>\u4f5c\u8005\uff1axlq<br>\u94fe\u63a5\uff1ahttps:\/\/www.jianshu.com\/p\/87d4d4071255<br>\u6765\u6e90\uff1a\u7b80\u4e66<br>\u8457\u4f5c\u6743\u5f52\u4f5c\u8005\u6240\u6709\u3002\u5546\u4e1a\u8f6c\u8f7d\u8bf7\u8054\u7cfb\u4f5c\u8005\u83b7\u5f97\u6388\u6743\uff0c\u975e\u5546\u4e1a\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u51fa\u5904\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8ba4\u8bc6Android\u6587\u4ef6\u7cfb\u7edf *\u4e86\u89e3\u5206\u533a\u5b58\u50a8 *\u5206\u533a\u5b58\u50a8\u7684\u9002\u914d \u4e00\u3001Android\u6587\u4ef6\u7cfb\u7edf Android\u6587\u4ef6\u7cfb [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":365,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.iotot.com\/index.php?rest_route=\/wp\/v2\/posts\/364"}],"collection":[{"href":"https:\/\/blog.iotot.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.iotot.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.iotot.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.iotot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=364"}],"version-history":[{"count":1,"href":"https:\/\/blog.iotot.com\/index.php?rest_route=\/wp\/v2\/posts\/364\/revisions"}],"predecessor-version":[{"id":369,"href":"https:\/\/blog.iotot.com\/index.php?rest_route=\/wp\/v2\/posts\/364\/revisions\/369"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.iotot.com\/index.php?rest_route=\/wp\/v2\/media\/365"}],"wp:attachment":[{"href":"https:\/\/blog.iotot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iotot.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iotot.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}