{"id":150573,"date":"2024-11-01T16:28:21","date_gmt":"2024-11-01T08:28:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/150573\/"},"modified":"2024-11-01T16:28:23","modified_gmt":"2024-11-01T08:28:23","slug":"%e5%ae%89%e5%8d%93%e6%93%8d%e4%bd%9c%ef%bc%9a%e5%88%aa%e9%99%a4%e6%89%80%e6%9c%89%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%98%e9%8c%84-android%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%89%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/150573\/","title":{"rendered":"\u5b89\u5353\u64cd\u4f5c\uff1a\u522a\u9664\u6240\u6709\u6578\u64da\u5eab\u8a18\u9304 (android\u522a\u9664\u6578\u64da\u5eab\u4e2d\u6240\u6709\u6578\u64da)"},"content":{"rendered":"<h1 id=\"%e5%ae%89%e5%8d%93%e6%93%8d%e4%bd%9c%ef%bc%9a%e5%88%aa%e9%99%a4%e6%89%80%e6%9c%89%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%98%e9%8c%84-mpOlvGViJo\">\u5b89\u5353\u64cd\u4f5c\uff1a\u522a\u9664\u6240\u6709\u6578\u64da\u5eab\u8a18\u9304<\/h1>\n<p>\u5728\u5b89\u5353\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002\u7576\u61c9\u7528\u7a0b\u5f0f\u9700\u8981\u6e05\u9664\u6240\u6709\u6578\u64da\u5eab\u4e2d\u7684\u8a18\u9304\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u638c\u63e1\u6b63\u78ba\u7684\u65b9\u6cd5\u4f86\u9032\u884c\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728\u5b89\u5353\u4e2d\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%89%80%e6%9c%89%e6%95%b8%e6%93%9a%ef%bc%9f-mpOlvGViJo\">\u70ba\u4ec0\u9ebc\u9700\u8981\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u6578\u64da\uff1f<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u6e05\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u61c9\u7528\u7a0b\u5f0f\u91cd\u7f6e\uff1a\u7576\u7528\u6236\u9078\u64c7\u91cd\u7f6e\u61c9\u7528\u7a0b\u5f0f\u6642\uff0c\u6240\u6709\u6578\u64da\u90fd\u9700\u8981\u88ab\u522a\u9664\u3002<\/li>\n<li>\u6e2c\u8a66\u76ee\u7684\uff1a\u5728\u958b\u767c\u548c\u6e2c\u8a66\u968e\u6bb5\uff0c\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u983b\u7e41\u5730\u6e05\u9664\u6578\u64da\u5eab\u4ee5\u6e2c\u8a66\u4e0d\u540c\u7684\u529f\u80fd\u3002<\/li>\n<li>\u6578\u64da\u6e05\u7406\uff1a\u7576\u6578\u64da\u4e0d\u518d\u9700\u8981\u6216\u904e\u6642\u6642\uff0c\u522a\u9664\u5b83\u5011\u53ef\u4ee5\u91cb\u653e\u5b58\u5132\u7a7a\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%89%80%e6%9c%89%e6%95%b8%e6%93%9a%e7%9a%84%e6%ad%a5%e9%a9%9f-mpOlvGViJo\">\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u6578\u64da\u7684\u6b65\u9a5f<\/h2>\n<p>\u5728\u5b89\u5353\u4e2d\uff0c\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u6578\u64da\u901a\u5e38\u6d89\u53ca\u5230\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e5%ba%ab%e5%af%a6%e4%be%8b-mpOlvGViJo\">1. \u7372\u53d6\u6578\u64da\u5eab\u5be6\u4f8b<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u7372\u53d6\u6578\u64da\u5eab\u7684\u5be6\u4f8b\u3002\u9019\u901a\u5e38\u662f\u901a\u904e\u64f4\u5c55 <code>SQLiteOpenHelper<\/code> \u985e\u4f86\u5be6\u73fe\u7684\u3002<\/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        super(context, DATABASE_NAME, null, DATABASE_VERSION);\n    }\n\n    @Override\n    public void onCreate(SQLiteDatabase db) {\n        \/\/ \u5275\u5efa\u8868\u683c\u7684\u4ee3\u78bc\n    }\n\n    @Override\n    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {\n        \/\/ \u5347\u7d1a\u6578\u64da\u5eab\u7684\u4ee3\u78bc\n    }\n}\n<\/code><\/pre>\n<h3 id=\"2-%e5%88%aa%e9%99%a4%e6%89%80%e6%9c%89%e6%95%b8%e6%93%9a-mpOlvGViJo\">2. \u522a\u9664\u6240\u6709\u6578\u64da<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u522a\u9664\u6240\u6709\u6578\u64da\u3002\u9019\u53ef\u4ee5\u901a\u904e\u57f7\u884c <code>DELETE FROM<\/code> \u8a9e\u53e5\u4f86\u5be6\u73fe\u3002<\/p>\n<pre><code>public void deleteAllData() {\n    SQLiteDatabase db = this.getWritableDatabase();\n    db.execSQL(\"DELETE FROM your_table_name\");\n    db.close();\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u78bc\u4e2d\uff0c\u8acb\u5c07 <code>your_table_name<\/code> \u66ff\u63db\u70ba\u60a8\u8981\u522a\u9664\u6578\u64da\u7684\u5be6\u969b\u8868\u540d\u3002<\/p>\n<h3 id=\"3-%e7%a2%ba%e8%aa%8d%e6%95%b8%e6%93%9a%e5%b7%b2%e8%a2%ab%e5%88%aa%e9%99%a4-mpOlvGViJo\">3. \u78ba\u8a8d\u6578\u64da\u5df2\u88ab\u522a\u9664<\/h3>\n<p>\u70ba\u4e86\u78ba\u4fdd\u6578\u64da\u5df2\u6210\u529f\u522a\u9664\uff0c\u60a8\u53ef\u4ee5\u67e5\u8a62\u8868\u683c\u4e2d\u7684\u8a18\u9304\u6578\u91cf\u3002<\/p>\n<pre><code>public int getRecordCount() {\n    SQLiteDatabase db = this.getReadableDatabase();\n    Cursor cursor = db.rawQuery(\"SELECT COUNT(*) FROM your_table_name\", null);\n    cursor.moveToFirst();\n    int count = cursor.getInt(0);\n    cursor.close();\n    return count;\n}\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-mpOlvGViJo\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u522a\u9664\u6578\u64da\u4e4b\u524d\uff0c\u8acb\u52d9\u5fc5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u5099\u4efd\uff1a\u5728\u522a\u9664\u6578\u64da\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u91cd\u8981\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u4e1f\u5931\u3002<\/li>\n<li>\u7528\u6236\u78ba\u8a8d\uff1a\u5982\u679c\u61c9\u7528\u7a0b\u5f0f\u6d89\u53ca\u7528\u6236\u6578\u64da\uff0c\u8acb\u8003\u616e\u5728\u522a\u9664\u4e4b\u524d\u5411\u7528\u6236\u78ba\u8a8d\u3002<\/li>\n<li>\u6027\u80fd\u5f71\u97ff\uff1a\u5927\u91cf\u522a\u9664\u64cd\u4f5c\u53ef\u80fd\u6703\u5f71\u97ff\u61c9\u7528\u7a0b\u5f0f\u7684\u6027\u80fd\uff0c\u5efa\u8b70\u5728\u975e\u9ad8\u5cf0\u6642\u6bb5\u9032\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-mpOlvGViJo\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u5b89\u5353\u958b\u767c\u4e2d\uff0c\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u64cd\u4f5c\u3002\u901a\u904e\u4f7f\u7528 <code>SQLiteOpenHelper<\/code> \u985e\u548c\u9069\u7576\u7684 SQL \u8a9e\u53e5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u6e05\u9664\u6578\u64da\u3002\u7121\u8ad6\u662f\u70ba\u4e86\u91cd\u7f6e\u61c9\u7528\u7a0b\u5f0f\u3001\u9032\u884c\u6e2c\u8a66\u9084\u662f\u6578\u64da\u6e05\u7406\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u5de7\u90fd\u80fd\u63d0\u9ad8\u958b\u767c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5f0f\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u5b89\u5353\u64cd\u4f5c\u7cfb\u7d71\u4e2d\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u7c21\u55ae\u6b65\u9a5f\u52a9\u4f60\u6e05\u7406\u6578\u64da\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\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-150573","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/150573","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=150573"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/150573\/revisions"}],"predecessor-version":[{"id":150574,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/150573\/revisions\/150574"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=150573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=150573"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=150573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}