{"id":163213,"date":"2024-11-04T21:37:28","date_gmt":"2024-11-04T13:37:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163213\/"},"modified":"2024-11-04T21:37:28","modified_gmt":"2024-11-04T13:37:28","slug":"%e8%a7%a3%e6%b1%baandroid%e5%85%a7%e5%ad%98%e4%b8%8d%e8%b6%b3%e5%95%8f%e9%a1%8c%ef%bc%8c%e6%8f%90%e5%8d%87%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e6%95%88%e7%8e%87%ef%bc%88android-%e5%85%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163213\/","title":{"rendered":"\u89e3\u6c7aAndroid\u5167\u5b58\u4e0d\u8db3\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\uff08Android \u5167\u5b58\u4e0d\u8db3\u5f71\u97ff\u6578\u64da\u5eab\u64cd\u4f5c\uff09"},"content":{"rendered":"<h1 id=\"%e8%a7%a3%e6%b1%baandroid%e5%85%a7%e5%ad%98%e4%b8%8d%e8%b6%b3%e5%95%8f%e9%a1%8c%ef%bc%8c%e6%8f%90%e5%8d%87%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e6%95%88%e7%8e%87-xbDgQDNtGD\">\u89e3\u6c7aAndroid\u5167\u5b58\u4e0d\u8db3\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u79fb\u52d5\u61c9\u7528\u958b\u767c\u4e2d\uff0cAndroid\u7cfb\u7d71\u7684\u5167\u5b58\u7ba1\u7406\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u8b70\u984c\u3002\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u8907\u96dc\u6027\u4e0d\u65b7\u589e\u52a0\uff0c\u958b\u767c\u8005\u7d93\u5e38\u9762\u81e8\u5167\u5b58\u4e0d\u8db3\u7684\u6311\u6230\uff0c\u9019\u4e0d\u50c5\u5f71\u97ff\u7528\u6236\u9ad4\u9a57\uff0c\u9084\u6703\u5c0d\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6548\u7387\u9020\u6210\u8ca0\u9762\u5f71\u97ff\u3002\u672c\u6587\u5c07\u63a2\u8a0eAndroid\u5167\u5b58\u4e0d\u8db3\u7684\u539f\u56e0\u53ca\u5176\u5c0d\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u5f71\u97ff\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6848\u4f86\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6548\u7387\u3002<\/p>\n<h2 id=\"android%e5%85%a7%e5%ad%98%e4%b8%8d%e8%b6%b3%e7%9a%84%e5%8e%9f%e5%9b%a0-xbDgQDNtGD\">Android\u5167\u5b58\u4e0d\u8db3\u7684\u539f\u56e0<\/h2>\n<p>Android\u8a2d\u5099\u7684\u5167\u5b58\u8cc7\u6e90\u6709\u9650\uff0c\u5c24\u5176\u662f\u5728\u4f4e\u7aef\u8a2d\u5099\u4e0a\uff0c\u9019\u4f7f\u5f97\u5167\u5b58\u7ba1\u7406\u8b8a\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5c0e\u81f4Android\u5167\u5b58\u4e0d\u8db3\u7684\u5e38\u898b\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u61c9\u7528\u7a0b\u5e8f\u5167\u5b58\u6d29\u6f0f\uff1a<\/strong>\u7576\u61c9\u7528\u7a0b\u5e8f\u672a\u80fd\u6b63\u78ba\u91cb\u653e\u4e0d\u518d\u4f7f\u7528\u7684\u8cc7\u6e90\u6642\uff0c\u6703\u5c0e\u81f4\u5167\u5b58\u6d29\u6f0f\uff0c\u6700\u7d42\u8017\u76e1\u53ef\u7528\u5167\u5b58\u3002<\/li>\n<li><strong>\u5927\u578b\u6578\u64da\u96c6\uff1a<\/strong>\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u96c6\u6642\uff0c\u7279\u5225\u662f\u7576\u6578\u64da\u5eab\u67e5\u8a62\u8fd4\u56de\u5927\u91cf\u6578\u64da\u6642\uff0c\u6703\u8fc5\u901f\u6d88\u8017\u5167\u5b58\u3002<\/li>\n<li><strong>\u591a\u4efb\u52d9\u8655\u7406\uff1a<\/strong>\u540c\u6642\u904b\u884c\u591a\u500b\u61c9\u7528\u7a0b\u5e8f\u6703\u5c0e\u81f4\u5167\u5b58\u8cc7\u6e90\u7684\u7af6\u722d\uff0c\u9032\u4e00\u6b65\u52a0\u5287\u5167\u5b58\u4e0d\u8db3\u7684\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%85%a7%e5%ad%98%e4%b8%8d%e8%b6%b3%e5%b0%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e7%9a%84%e5%bd%b1%e9%9f%bf-xbDgQDNtGD\">\u5167\u5b58\u4e0d\u8db3\u5c0d\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u5f71\u97ff<\/h2>\n<p>\u5167\u5b58\u4e0d\u8db3\u6703\u5c0d\u6578\u64da\u5eab\u64cd\u4f5c\u7522\u751f\u591a\u65b9\u9762\u7684\u5f71\u97ff\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\uff1a<\/strong>\u7576\u5167\u5b58\u4e0d\u8db3\u6642\uff0c\u6578\u64da\u5eab\u53ef\u80fd\u7121\u6cd5\u5c07\u6578\u64da\u52a0\u8f09\u5230\u5167\u5b58\u4e2d\uff0c\u5c0e\u81f4\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\uff0c\u67e5\u8a62\u6642\u9593\u5ef6\u9577\u3002<\/li>\n<li><strong>\u61c9\u7528\u5d29\u6f70\uff1a<\/strong>\u5728\u6975\u7aef\u60c5\u6cc1\u4e0b\uff0c\u5167\u5b58\u4e0d\u8db3\u53ef\u80fd\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u5d29\u6f70\uff0c\u7279\u5225\u662f\u5728\u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\u3002<\/li>\n<li><strong>\u6578\u64da\u4e1f\u5931\u98a8\u96aa\uff1a<\/strong>\u5982\u679c\u61c9\u7528\u7a0b\u5e8f\u5728\u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\u5d29\u6f70\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u672a\u63d0\u4ea4\u7684\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88%ef%bc%9a%e6%8f%90%e5%8d%87%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e6%95%88%e7%8e%87-xbDgQDNtGD\">\u89e3\u6c7a\u65b9\u6848\uff1a\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7aAndroid\u5167\u5b58\u4e0d\u8db3\u554f\u984c\u4e26\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6548\u7387\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u7b56\u7565\uff1a<\/p>\n<h3 id=\"1-%e5%84%aa%e5%8c%96%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2-xbDgQDNtGD\">1. \u512a\u5316\u6578\u64da\u5eab\u67e5\u8a62<\/h3>\n<p>\u4f7f\u7528\u9ad8\u6548\u7684\u67e5\u8a62\u8a9e\u53e5\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u6aa2\u7d22\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\uff0c\u4e26\u78ba\u4fdd\u53ea\u6aa2\u7d22\u6240\u9700\u7684\u5b57\u6bb5\u3002<\/p>\n<pre><code>SELECT name, age FROM users WHERE age &gt; 18;<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e6%b5%81%e5%bc%8f%e8%99%95%e7%90%86-xbDgQDNtGD\">2. \u4f7f\u7528\u6d41\u5f0f\u8655\u7406<\/h3>\n<p>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u8003\u616e\u4f7f\u7528\u6d41\u5f0f\u8655\u7406\u6280\u8853\uff0c\u9010\u6b65\u52a0\u8f09\u6578\u64da\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u52a0\u8f09\u6240\u6709\u6578\u64da\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u5167\u5b58\u4f7f\u7528\u3002<\/p>\n<h3 id=\"3-%e9%87%8b%e6%94%be%e4%b8%8d%e5%bf%85%e8%a6%81%e7%9a%84%e8%b3%87%e6%ba%90-xbDgQDNtGD\">3. \u91cb\u653e\u4e0d\u5fc5\u8981\u7684\u8cc7\u6e90<\/h3>\n<p>\u78ba\u4fdd\u5728\u4e0d\u518d\u9700\u8981\u6642\u91cb\u653e\u8cc7\u6e90\uff0c\u4f8b\u5982\u95dc\u9589\u4e0d\u518d\u4f7f\u7528\u7684\u6578\u64da\u5eab\u9023\u63a5\u548c\u6e38\u6a19\u3002<\/p>\n<pre><code>if (cursor != null) {\n    cursor.close();\n}<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e5%85%a7%e5%ad%98%e7%b7%a9%e5%ad%98-xbDgQDNtGD\">4. \u4f7f\u7528\u5167\u5b58\u7de9\u5b58<\/h3>\n<p>\u8003\u616e\u4f7f\u7528\u5167\u5b58\u7de9\u5b58\u6280\u8853\uff0c\u4f8b\u5982\u4f7f\u7528 LruCache \u4f86\u7de9\u5b58\u5e38\u7528\u6578\u64da\uff0c\u6e1b\u5c11\u5c0d\u6578\u64da\u5eab\u7684\u983b\u7e41\u8a2a\u554f\u3002<\/p>\n<pre><code>LruCache&lt;String, Bitmap&gt; cache = new LruCache&lt;&gt;(cacheSize);<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-xbDgQDNtGD\">\u7d50\u8ad6<\/h2>\n<p>Android\u5167\u5b58\u4e0d\u8db3\u554f\u984c\u5c0d\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u5f71\u97ff\u4e0d\u5bb9\u5ffd\u8996\u3002\u901a\u904e\u512a\u5316\u67e5\u8a62\u3001\u4f7f\u7528\u6d41\u5f0f\u8655\u7406\u3001\u91cb\u653e\u4e0d\u5fc5\u8981\u7684\u8cc7\u6e90\u4ee5\u53ca\u4f7f\u7528\u5167\u5b58\u7de9\u5b58\u7b49\u65b9\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6548\u7387\uff0c\u5f9e\u800c\u6539\u5584\u7528\u6236\u9ad4\u9a57\u3002\u96a8\u8457\u6280\u8853\u7684\u9032\u6b65\uff0c\u6301\u7e8c\u95dc\u6ce8\u5167\u5b58\u7ba1\u7406\u5c07\u662f\u6bcf\u4f4dAndroid\u958b\u767c\u8005\u7684\u91cd\u8981\u4efb\u52d9\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc\u5982\u4f55\u63d0\u5347\u60a8\u7684\u61c9\u7528\u6027\u80fd\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u63a2\u7d22\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u5728\u958b\u767c\u904e\u7a0b\u4e2d\u7372\u5f97\u66f4\u597d\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7aAndroid\u5167\u5b58\u4e0d\u8db3\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\uff0c\u78ba\u4fdd\u61c9\u7528\u6d41\u66a2\u904b\u884c\uff0c\u512a\u5316\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-163213","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163213","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=163213"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163213\/revisions"}],"predecessor-version":[{"id":163214,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163213\/revisions\/163214"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163213"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}