{"id":58447,"date":"2024-10-12T20:43:18","date_gmt":"2024-10-12T12:43:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/58447\/"},"modified":"2024-10-12T20:43:18","modified_gmt":"2024-10-12T12:43:18","slug":"android%e6%95%b8%e6%93%9a%e5%ba%ab%e5%85%b1%e4%ba%ab%e9%80%a3%e6%8e%a5%e7%9a%84%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-android-%e5%85%b1%e4%ba%ab%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/58447\/","title":{"rendered":"Android\u6578\u64da\u5eab\u5171\u4eab\u9023\u63a5\u7684\u5be6\u73fe\u65b9\u6cd5 (android \u5171\u4eab\u6578\u64da\u5eab\u9023\u63a5)"},"content":{"rendered":"<h1 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id=\"%e5%af%a6%e7%8f%be%e5%85%b1%e4%ba%ab%e9%80%a3%e6%8e%a5%e7%9a%84%e6%96%b9%e6%b3%95-ZnUlYKgUnz\">\u5be6\u73fe\u5171\u4eab\u9023\u63a5\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728Android\u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u5171\u4eab\u9023\u63a5\uff0c\u901a\u5e38\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u5f0f\u4f86\u9054\u6210\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e5%96%ae%e4%be%8b%e6%a8%a1%e5%bc%8f-ZnUlYKgUnz\">1. \u4f7f\u7528\u55ae\u4f8b\u6a21\u5f0f<\/h3>\n<p>\u55ae\u4f8b\u6a21\u5f0f\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u8a2d\u8a08\u6a21\u5f0f\uff0c\u53ef\u4ee5\u78ba\u4fdd\u4e00\u500b\u985e\u53ea\u6709\u4e00\u500b\u5be6\u4f8b\uff0c\u4e26\u63d0\u4f9b\u5168\u5c40\u8a2a\u554f\u9ede\u3002\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\uff0c\u4f7f\u7528\u55ae\u4f8b\u6a21\u5f0f\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u6578\u64da\u5eab\u9023\u63a5\u88ab\u5275\u5efa\u3002<\/p>\n<pre><code>public class DatabaseHelper extends SQLiteOpenHelper {\n    private static DatabaseHelper instance;\n\n    private DatabaseHelper(Context context) {\n        super(context, DATABASE_NAME, null, DATABASE_VERSION);\n    }\n\n    public static synchronized DatabaseHelper getInstance(Context context) {\n        if (instance == null) {\n            instance = new DatabaseHelper(context.getApplicationContext());\n        }\n        return instance;\n    }\n\n    @Override\n    public void onCreate(SQLiteDatabase db) {\n        \/\/ \u5275\u5efa\u6578\u64da\u8868\n    }\n\n    @Override\n    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {\n        \/\/ \u5347\u7d1a\u6578\u64da\u8868\n    }\n}<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8contentprovider-ZnUlYKgUnz\">2. 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