{"id":930,"date":"2015-06-14T19:26:22","date_gmt":"2015-06-14T11:26:22","guid":{"rendered":"https:\/\/www.ray650128.com\/wordpress\/?p=930"},"modified":"2021-05-13T09:56:49","modified_gmt":"2021-05-13T01:56:49","slug":"android%e5%9b%9b%e5%a4%a7%e5%85%83%e4%bb%b6%e4%b9%8bcontent-provider","status":"publish","type":"post","link":"https:\/\/blog.ray650128.com\/?p=930","title":{"rendered":"[Android]\u56db\u5927\u5143\u4ef6\u4e4bContent Provider"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u95dc\u65bcContent Provider<\/h2>\n\n\n\n<p>Content Provider\u662fAndroid\u63d0\u4f9b\u7d66\u61c9\u7528\u7a0b\u5f0f\u9593\u5171\u4eab\u8cc7\u6599\u7684\u4e00\u500b\u4ecb\u9762\u3002<\/p>\n\n\n\n<p>\u76ee\u524dAndroid\u5167\u5efa\u4e86\u5e7e\u500b\u53ef\u4ee5\u63d0\u4f9b\u7d66\u5916\u90e8\u61c9\u7528\u7a0b\u5f0f\u4f7f\u7528\u7684\u5167\u5bb9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u806f\u7d61\u4eba<\/li><li>\u96fb\u8a71\u7d00\u9304<\/li><li>\u5f71\u7247\u3001\u97f3\u6a02\u3001\u5716\u7247\u7b49\u591a\u5a92\u9ad4<\/li><li>\u700f\u89bd\u5668<\/li><li>\u7cfb\u7d71\u8a2d\u5b9a<\/li><\/ul>\n\n\n\n<p>\u9019\u4e9b\u5206\u4eab\u8cc7\u6599\u7684\u57fa\u672c\u683c\u5f0f\u662f\u4f7f\u7528URI\u7576\u6210\u8cc7\u6599\u50b3\u905e\u7684\u5a92\u4ecb\uff0c\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">content:\/\/[path]\/id<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u95dc\u65bcContent Resolver<\/h2>\n\n\n\n<p>\u524d\u9762\u63d0\u5230Content Provider\u662f\u8ca0\u8cac\u5c07\u624b\u6a5f\u4e2d\u5171\u4eab\u8cc7\u6599\u63d0\u4f9b\u7d66\u61c9\u7528\u7a0b\u5f0f\u4f7f\u7528\u7684\u5143\u4ef6\uff0c\u800cContent Resolver\u5247\u662f\u7528\u4f86\u53d6\u5f97\u6216\u662f\u4fee\u6539\u9019\u4e9b\u5171\u4eab\u8cc7\u6599\u7684\u5143\u4ef6\u3002<\/p>\n\n\n\n<p>\u4f46\u6709\u4e00\u9ede\u5fc5\u9808\u5148\u63d0\u5230\uff0c\u82e5\u9700\u8981\u5beb\u5165\u6216\u662f\u4fee\u6539\u8cc7\u6599\uff0c\u5247\u8981\u770b\u76ee\u6a19\u7684Content Provider\u662f\u5426\u5141\u8a31\u4f7f\u7528\u8005\u5c0d\u8cc7\u6599\u5b58\u53d6\u7684\u52d5\u4f5c\uff0c\u5982\u679c\u6c92\u6709\u6b64\u6b0a\u9650\uff0c\u5247Content Resolver\u65b9\u6cd5\u5c31\u6703\u5931\u6557\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4ee5\u4e0b\u7528\u53d6\u5f97\u624b\u6a5f\u4e2d\u7684\u97f3\u6a02\u6a94\u70ba\u5be6\u969b\u64cd\u4f5c\u4f8b\u5b50\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">ContentResolver resolver = getContentResolver();\n\/\/ \u8a2d\u5b9a\u67e5\u8a62\u7684 URI \u70ba MediaStore.Audio\nUri uri = MediaStore.Audio.Media.<em>EXTERNAL_CONTENT_URI<\/em>;\nString[] projection = new String[]{\n        MediaStore.Audio.Media.<em>_ID<\/em>,\n        MediaStore.Audio.Media.<em>TITLE<\/em>,\n        MediaStore.Audio.Media.<em>ARTIST<\/em>,\n        MediaStore.Audio.Media.<em>ALBUM<\/em>,\n        MediaStore.Audio.Media.<em>DURATION\n<\/em>};\n\n\/\/ \u6307\u5b9a\u67e5\u8a62\u7684\u97f3\u6a02\u6642\u9593\u9577\u5ea6\u5927\u65bc 1 \u5206\u9418\nString selection = MediaStore.Audio.Media.<em>DURATION <\/em>+ \" >= ?\";\nString[] selectionArgs = new String[]{\n        String.<em>valueOf<\/em>(TimeUnit.<em>MILLISECONDS<\/em>.convert(1, TimeUnit.<em>MINUTES<\/em>))\n};\n\n\/\/ \u7531\u65b0\u5230\u820a\u6392\u5e8f\nString sortOrder = MediaStore.Audio.Media.<em>DATE_ADDED <\/em>+ \" DESC\";\n\n\/\/ \u900f\u904e Cursor \u67e5\u8a62\nCursor cursor = resolver.query(uri, projection, selection, selectionArgs, sortOrder);\n\n\/\/ \u5982\u679c\u67e5\u8a62\u689d\u4ef6\u6210\u7acb\uff0c\u5247\u904d\u6b77 cursor \u4e2d\u7684\u7d50\u679c\uff0c\u53d6\u51fa\u8cc7\u6599\nif (cursor != null &amp;&amp; cursor.moveToFirst()) {\n    int idColumn = cursor.getColumnIndex(MediaStore.Audio.Media.<em>_ID<\/em>);\n    int titleColumn = cursor.getColumnIndex(MediaStore.Audio.Media.<em>TITLE<\/em>);\n    int artistColumn = cursor.getColumnIndex(MediaStore.Audio.Media.<em>ARTIST<\/em>);\n    do {\n        Long thisId = cursor.getLong(idColumn);\n        String thisTitle = cursor.getString(titleColumn);\n        String thisArtist = cursor.getString(artistColumn);\n\n        \/\/ TODO: Do something....\n\n    } while (cursor.moveToNext());\n    cursor.close();\n}<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u662f Content Provider\u7684\u4e00\u4e9b\u8aaa\u660e\u53ca\u7c21\u55ae\u7684\u7528\u6cd5\u3002<\/p>\n\n\n\n<p>Android\u63d0\u4f9b\u4e86Content Provider\u5143\u4ef6\u8b93\u6211\u5011\u53ef\u4ee5\u5f88\u4ee5\u7c21\u55ae\u7684\u65b9\u5f0f\u4f86\u53d6\u5f97\u624b\u6a5f\u4e2d\u7684\u5171\u4eab\u8cc7\u6599\uff0c\u5982\u4e0a\u9762\u7684\u4f7f\u7528\u7bc4\u4f8b\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u65e5\u5f8c\u6709\u66f4\u9032\u968e\u7684\u7528\u6cd5\uff0c\u6703\u984d\u5916\u518d\u88dc\u5145\u4e0a\u53bb\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5c0d\u65bcContent Provider\u60f3\u8981\u66f4\u6df1\u5165\u7814\u7a76\uff0c\u53ef\u4ee5\u53c3\u8003<a href=\"https:\/\/developer.android.com\/reference\/android\/content\/ContentProvider\" data-type=\"URL\" data-id=\"https:\/\/developer.android.com\/reference\/android\/content\/ContentProvider\">Android Developers<\/a>\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u95dc\u65bcContent Provider Content Provider\u662fAndroid\u63d0\u4f9b\u7d66\u61c9\u7528\u7a0b\u5f0f\u9593\u5171\u4eab\u8cc7\u6599 &hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-930","post","type-post","status-publish","format-standard","hentry","category-2"],"_links":{"self":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/930","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=930"}],"version-history":[{"count":9,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/930\/revisions"}],"predecessor-version":[{"id":948,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/930\/revisions\/948"}],"wp:attachment":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}