{"id":58379,"date":"2024-10-12T20:15:14","date_gmt":"2024-10-12T12:15:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/58379\/"},"modified":"2024-10-12T20:15:14","modified_gmt":"2024-10-12T12:15:14","slug":"android-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%89%b5%e5%bb%ba%e6%99%82%e6%a9%9f%e6%8e%a2%e7%a9%b6-android%e4%bb%80%e9%ba%bc%e6%99%82%e5%80%99%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/58379\/","title":{"rendered":"Android \u6578\u64da\u5eab\u5275\u5efa\u6642\u6a5f\u63a2\u7a76 (android\u4ec0\u9ebc\u6642\u5019\u5275\u5efa\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"android-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%89%b5%e5%bb%ba%e6%99%82%e6%a9%9f%e6%8e%a2%e7%a9%b6-iIvUCPVvSX\">Android \u6578\u64da\u5eab\u5275\u5efa\u6642\u6a5f\u63a2\u7a76<\/h1>\n<p>\u5728\u958b\u767c Android 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\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u5275\u5efa\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u5e7e\u500b\u6642\u6a5f\uff1a<\/p>\n<ul>\n<li><strong>\u61c9\u7528\u9996\u6b21\u555f\u52d5\u6642\uff1a<\/strong>\u7576\u7528\u6236\u9996\u6b21\u555f\u52d5\u61c9\u7528\u6642\uff0c\u61c9\u7528\u53ef\u4ee5\u6aa2\u67e5\u6578\u64da\u5eab\u662f\u5426\u5b58\u5728\u3002\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5247\u5275\u5efa\u4e00\u500b\u65b0\u7684\u6578\u64da\u5eab\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u9700\u8981\u5728\u9996\u6b21\u4f7f\u7528\u6642\u521d\u59cb\u5316\u6578\u64da\u7684\u61c9\u7528\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u7248\u672c\u66f4\u65b0\u6642\uff1a<\/strong>\u5982\u679c\u61c9\u7528\u9700\u8981\u66f4\u65b0\u6578\u64da\u5eab\u7d50\u69cb\uff08\u4f8b\u5982\uff0c\u6dfb\u52a0\u65b0\u8868\u6216\u4fee\u6539\u73fe\u6709\u8868\uff09\uff0c\u5247\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u7248\u672c\u865f\u589e\u52a0\u6642\u9032\u884c\u6578\u64da\u5eab\u7684\u5347\u7d1a\u3002\u9019\u901a\u5e38\u5728 <code>onUpgrade()<\/code> \u65b9\u6cd5\u4e2d\u8655\u7406\u3002<\/li>\n<li><strong>\u7279\u5b9a\u529f\u80fd\u555f\u7528\u6642\uff1a<\/strong>\u67d0\u4e9b\u61c9\u7528\u53ef\u80fd\u6703\u6839\u64da\u7528\u6236\u7684\u64cd\u4f5c\u6216\u9078\u64c7\u4f86\u5275\u5efa\u6578\u64da\u5eab\u3002\u4f8b\u5982\uff0c\u7576\u7528\u6236\u9078\u64c7\u67d0\u500b\u529f\u80fd\u6642\uff0c\u61c9\u7528\u53ef\u4ee5\u6839\u64da\u9700\u8981\u5275\u5efa\u76f8\u61c9\u7684\u6578\u64da\u5eab\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%89%b5%e5%bb%ba%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-iIvUCPVvSX\">\u6578\u64da\u5eab\u5275\u5efa\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u5275\u5efa\u6578\u64da\u5eab\u6642\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u63d0\u9ad8\u61c9\u7528\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u55ae\u4f8b\u6a21\u5f0f\uff1a<\/strong>\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u5be6\u4f8b\u662f\u55ae\u4f8b\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u591a\u6b21\u5275\u5efa\u6578\u64da\u5eab\u9023\u63a5\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li><strong>\u7570\u6b65\u64cd\u4f5c\uff1a<\/strong>\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u61c9\u907f\u514d\u5728\u4e3b\u7dda\u7a0b\u4e2d\u57f7\u884c\u9577\u6642\u9593\u7684\u64cd\u4f5c\uff0c\u4ee5\u514d\u5f71\u97ff\u7528\u6236\u9ad4\u9a57\u3002\u53ef\u4ee5\u4f7f\u7528 AsyncTask \u6216\u5176\u4ed6\u7570\u6b65\u8655\u7406\u65b9\u5f0f\u4f86\u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u7248\u672c\u7ba1\u7406\uff1a<\/strong>\u5728\u6578\u64da\u5eab\u7d50\u69cb\u767c\u751f\u8b8a\u5316\u6642\uff0c\u61c9\u9069\u7576\u7ba1\u7406\u6578\u64da\u5eab\u7248\u672c\uff0c\u4e26\u5728 <code>onUpgrade()<\/code> \u65b9\u6cd5\u4e2d\u8655\u7406\u6578\u64da\u9077\u79fb\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-iIvUCPVvSX\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 Android \u61c9\u7528\u4e2d\u5275\u5efa\u6578\u64da\u5eab\uff1a<\/p>\n<pre><code>public class MyDatabaseHelper extends SQLiteOpenHelper {\n    private static final String DATABASE_NAME = \"mydatabase.db\";\n    private static final int DATABASE_VERSION = 1;\n\n    public MyDatabaseHelper(Context context) {\n   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