{"id":58369,"date":"2024-10-12T20:11:19","date_gmt":"2024-10-12T12:11:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/58369\/"},"modified":"2024-10-12T20:11:19","modified_gmt":"2024-10-12T12:11:19","slug":"android-%e5%a4%9a%e7%b7%9a%e7%a8%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e7%9a%84%e5%84%aa%e5%8b%a2%e8%88%87%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-android-%e5%a4%9a%e7%b7%9a%e7%a8%8b%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/58369\/","title":{"rendered":"Android \u591a\u7dda\u7a0b\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u512a\u52e2\u8207\u5be6\u73fe\u65b9\u6cd5 (android \u591a\u7dda\u7a0b\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"android-%e5%a4%9a%e7%b7%9a%e7%a8%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e7%9a%84%e5%84%aa%e5%8b%a2%e8%88%87%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-ZkooNktgPL\">Android \u591a\u7dda\u7a0b\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u512a\u52e2\u8207\u5be6\u73fe\u65b9\u6cd5<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u79fb\u52d5\u61c9\u7528\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u96a8\u8457\u61c9\u7528\u529f\u80fd\u7684\u589e\u5f37\uff0c\u6578\u64da\u7684\u8b80\u53d6\u548c\u5beb\u5165\u9700\u6c42\u4e5f\u96a8\u4e4b\u589e\u52a0\u3002\u70ba\u4e86\u63d0\u9ad8\u61c9\u7528\u7684\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\uff0cAndroid \u958b\u767c\u8005\u8d8a\u4f86\u8d8a\u591a\u5730\u63a1\u7528\u591a\u7dda\u7a0b\u6280\u8853\u4f86\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u63a2\u8a0e Android \u591a\u7dda\u7a0b\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u512a\u52e2\u53ca\u5176\u5be6\u73fe\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e7%b7%9a%e7%a8%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e7%9a%84%e5%84%aa%e5%8b%a2-ZkooNktgPL\">\u591a\u7dda\u7a0b\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u63d0\u9ad8\u6027\u80fd\uff1a<\/strong>\u591a\u7dda\u7a0b\u53ef\u4ee5\u540c\u6642\u8655\u7406\u591a\u500b\u6578\u64da\u5eab\u8acb\u6c42\uff0c\u5f9e\u800c\u6e1b\u5c11\u7528\u6236\u7b49\u5f85\u6642\u9593\u3002\u4f8b\u5982\uff0c\u7576\u7528\u6236\u5728\u61c9\u7528\u4e2d\u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\uff0c\u5176\u4ed6\u7dda\u7a0b\u53ef\u4ee5\u540c\u6642\u8655\u7406\u6578\u64da\u7684\u63d2\u5165\u6216\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u589e\u5f37\u7528\u6236\u9ad4\u9a57\uff1a<\/strong>\u901a\u904e\u5c07\u6578\u64da\u5eab\u64cd\u4f5c\u653e\u5728\u80cc\u666f\u7dda\u7a0b\u4e2d\uff0c\u61c9\u7528\u7684\u4e3b\u754c\u9762\u53ef\u4ee5\u4fdd\u6301\u6d41\u66a2\uff0c\u907f\u514d\u56e0\u70ba\u6578\u64da\u5eab\u64cd\u4f5c\u800c\u5c0e\u81f4\u7684\u5361\u9813\u73fe\u8c61\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u5229\u7528\u7387\u9ad8\uff1a<\/strong>\u591a\u7dda\u7a0b\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5229\u7528 CPU \u8cc7\u6e90\uff0c\u7279\u5225\u662f\u5728\u591a\u6838\u8655\u7406\u5668\u4e0a\uff0c\u80fd\u5920\u5145\u5206\u767c\u63ee\u786c\u4ef6\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"android-%e4%b8%ad%e7%9a%84%e5%a4%9a%e7%b7%9a%e7%a8%8b%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-ZkooNktgPL\">Android \u4e2d\u7684\u591a\u7dda\u7a0b\u5be6\u73fe\u65b9\u6cd5<\/h2>\n<p>\u5728 Android \u4e2d\uff0c\u6709\u5e7e\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\u53ef\u4ee5\u5be6\u73fe\u591a\u7dda\u7a0b\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u4e3b\u8981\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-asynctask-ZkooNktgPL\">1. \u4f7f\u7528 AsyncTask<\/h3>\n<p>AsyncTask \u662f Android \u63d0\u4f9b\u7684\u4e00\u500b\u8f15\u91cf\u7d1a\u7684\u591a\u7dda\u7a0b\u5de5\u5177\uff0c\u9069\u5408\u7528\u65bc\u7c21\u55ae\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 AsyncTask \u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>public class DatabaseTask extends AsyncTask&lt;Void, Void, List&gt; {\n    @Override\n    protected List doInBackground(Void... voids) {\n        \/\/ \u5728\u9019\u88e1\u57f7\u884c\u6578\u64da\u5eab\u67e5\u8a62\n        return database.queryData();\n    }\n\n    @Override\n    protected void onPostExecute(List result) {\n        \/\/ \u66f4\u65b0 UI\n        updateUI(result);\n    }\n}\n<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-handler-%e5%92%8c-thread-ZkooNktgPL\">2. \u4f7f\u7528 Handler \u548c Thread<\/h3>\n<p>\u53e6\u4e00\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 Handler \u548c Thread\u3002\u9019\u7a2e\u65b9\u6cd5\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u9748\u6d3b\u6027\uff0c\u9069\u5408\u9700\u8981\u9032\u884c\u8907\u96dc\u64cd\u4f5c\u7684\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>public class DatabaseThread extends Thread {\n    private Handler handler;\n\n    public DatabaseThread(Handler handler) {\n        this.handler = handler;\n    }\n\n    @Override\n    public void run() {\n        \/\/ \u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\n        List result = database.queryData();\n        \/\/ \u901a\u77e5\u4e3b\u7dda\u7a0b\u66f4\u65b0 UI\n        Message msg = handler.obtainMessage();\n        msg.obj = result;\n        handler.sendMessage(msg);\n    }\n}\n<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8-kotlin-coroutines-ZkooNktgPL\">3. \u4f7f\u7528 Kotlin Coroutines<\/h3>\n<p>\u5982\u679c\u60a8\u4f7f\u7528 Kotlin \u958b\u767c\uff0c\u5247\u53ef\u4ee5\u5229\u7528\u5354\u7a0b\u4f86\u7c21\u5316\u591a\u7dda\u7a0b\u64cd\u4f5c\u3002\u5354\u7a0b\u63d0\u4f9b\u4e86\u66f4\u7c21\u6f54\u7684\u8a9e\u6cd5\u548c\u66f4\u597d\u7684\u53ef\u8b80\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u5354\u7a0b\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>GlobalScope.launch(Dispatchers.IO) {\n    val result = database.queryData()\n    withContext(Dispatchers.Main) {\n        \/\/ \u66f4\u65b0 UI\n        updateUI(result)\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-ZkooNktgPL\">\u7d50\u8ad6<\/h2>\n<p>\u5728 Android \u958b\u767c\u4e2d\uff0c\u4f7f\u7528\u591a\u7dda\u7a0b\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u6027\u80fd\uff0c\u9084\u80fd\u589e\u5f37\u7528\u6236\u9ad4\u9a57\u3002\u7121\u8ad6\u662f\u4f7f\u7528 AsyncTask\u3001Handler \u548c Thread\uff0c\u9084\u662f Kotlin \u7684\u5354\u7a0b\uff0c\u958b\u767c\u8005\u90fd\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u4f86\u5be6\u73fe\u591a\u7dda\u7a0b\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u96a8\u8457\u6280\u8853\u7684\u9032\u6b65\uff0c\u9019\u4e9b\u65b9\u6cd5\u5c07\u6301\u7e8c\u6f14\u8b8a\uff0c\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u66f4\u9ad8\u6548\u7684\u5de5\u5177\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c\u5176\u4ed6\u670d\u52d9\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Android\u591a\u7dda\u7a0b\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u512a\u52e2\u8207\u5be6\u73fe\u65b9\u6cd5\uff0c\u63d0\u9ad8\u61c9\u7528\u6027\u80fd\u8207\u7528\u6236\u9ad4\u9a57\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u8655\u7406\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-58369","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58369","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=58369"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58369\/revisions"}],"predecessor-version":[{"id":58370,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/58369\/revisions\/58370"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=58369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=58369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=58369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}