{"id":58381,"date":"2024-10-12T20:16:17","date_gmt":"2024-10-12T12:16:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/58381\/"},"modified":"2024-10-12T20:16:17","modified_gmt":"2024-10-12T12:16:17","slug":"android-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%98%e5%84%b2%e4%bd%8d%e7%bd%ae%e8%a7%a3%e6%9e%90-android%e5%89%b5%e5%bb%ba%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9c%a8%e5%93%aa%e8%a3%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/58381\/","title":{"rendered":"Android \u6578\u64da\u5eab\u5b58\u5132\u4f4d\u7f6e\u89e3\u6790 (android\u5275\u5efa\u7684\u6578\u64da\u5eab\u5728\u54ea\u88e1)"},"content":{"rendered":"<h1 id=\"android-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%98%e5%84%b2%e4%bd%8d%e7%bd%ae%e8%a7%a3%e6%9e%90-android%e5%89%b5%e5%bb%ba%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9c%a8%e5%93%aa%e8%a3%a1-gEIJKrlTgN\">Android \u6578\u64da\u5eab\u5b58\u5132\u4f4d\u7f6e\u89e3\u6790 (android\u5275\u5efa\u7684\u6578\u64da\u5eab\u5728\u54ea\u88e1)<\/h1>\n<p>\u5728Android\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u662f\u975e\u5e38\u666e\u904d\u7684\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u6301\u4e45\u5316\u5b58\u5132\u6578\u64da\u7684\u61c9\u7528\u4e2d\u3002Android\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u5eab\u9078\u64c7\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662fSQLite\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0eAndroid\u5275\u5efa\u7684\u6578\u64da\u5eab\u5b58\u5132\u4f4d\u7f6e\uff0c\u4ee5\u53ca\u5982\u4f55\u8a2a\u554f\u548c\u7ba1\u7406\u9019\u4e9b\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"android%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-gEIJKrlTgN\">Android\u6578\u64da\u5eab\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>SQLite\u662f\u4e00\u500b\u8f15\u91cf\u7d1a\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff0cAndroid\u7cfb\u7d71\u5167\u5efa\u4e86\u5c0d\u5176\u7684\u652f\u6301\u3002\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528SQLite\u4f86\u5b58\u5132\u61c9\u7528\u7684\u6578\u64da\uff0c\u9019\u4e9b\u6578\u64da\u53ef\u4ee5\u662f\u7528\u6236\u4fe1\u606f\u3001\u61c9\u7528\u8a2d\u7f6e\u6216\u5176\u4ed6\u9700\u8981\u6301\u4e45\u5316\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%ad%98%e5%84%b2%e4%bd%8d%e7%bd%ae-gEIJKrlTgN\">\u6578\u64da\u5eab\u7684\u5b58\u5132\u4f4d\u7f6e<\/h2>\n<p>\u5728Android\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u5b58\u5132\u4f4d\u7f6e\u53d6\u6c7a\u65bc\u61c9\u7528\u7684\u4e0a\u4e0b\u6587\u3002\u901a\u5e38\uff0c\u6578\u64da\u5eab\u6703\u88ab\u5b58\u5132\u5728\u61c9\u7528\u7684\u79c1\u6709\u76ee\u9304\u4e2d\uff0c\u5177\u9ad4\u8def\u5f91\u5982\u4e0b\uff1a<\/p>\n<pre><code>\/data\/data\/\/databases\/\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c\u662f\u61c9\u7528\u7684\u5305\u540d\uff0c\u662f\u4f60\u5275\u5efa\u7684\u6578\u64da\u5eab\u7684\u540d\u7a31\u3002\u9019\u500b\u76ee\u9304\u662f\u61c9\u7528\u7684\u79c1\u6709\u7a7a\u9593\uff0c\u5176\u4ed6\u61c9\u7528\u7121\u6cd5\u8a2a\u554f\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%ba%e5%92%8c%e8%a8%aa%e5%95%8f%e6%95%b8%e6%93%9a%e5%ba%ab-gEIJKrlTgN\">\u5982\u4f55\u5275\u5efa\u548c\u8a2a\u554f\u6578\u64da\u5eab<\/h2>\n<p>\u5728Android\u4e2d\u5275\u5efa\u6578\u64da\u5eab\u901a\u5e38\u6d89\u53ca\u5230\u7e7c\u627fSQLiteOpenHelper\u985e\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\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        super(context, DATABASE_NAME, null, DATABASE_VERSION);\n    }\n\n    @Override\n    public void onCreate(SQLiteDatabase db) {\n        String createTable = \"CREATE TABLE mytable (id INTEGER PRIMARY KEY, name TEXT)\";\n        db.execSQL(createTable);\n    }\n\n    @Override\n    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {\n        db.execSQL(\"DROP TABLE IF EXISTS mytable\");\n        onCreate(db);\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba\u201cmydatabase.db\u201d\u7684\u6578\u64da\u5eab\uff0c\u4e26\u5728\u5176\u4e2d\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba\u201cmytable\u201d\u7684\u8868\u3002\u8981\u8a2a\u554f\u9019\u500b\u6578\u64da\u5eab\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\uff1a<\/p>\n<pre><code>MyDatabaseHelper dbHelper = new MyDatabaseHelper(context);\nSQLiteDatabase db = dbHelper.getWritableDatabase();\n<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e8%a8%aa%e5%95%8f%e6%ac%8a%e9%99%90-gEIJKrlTgN\">\u6578\u64da\u5eab\u7684\u8a2a\u554f\u6b0a\u9650<\/h2>\n<p>\u7531\u65bc\u6578\u64da\u5eab\u5b58\u5132\u5728\u61c9\u7528\u7684\u79c1\u6709\u76ee\u9304\u4e2d\uff0c\u53ea\u6709\u8a72\u61c9\u7528\u672c\u8eab\u53ef\u4ee5\u8a2a\u554f\u9019\u4e9b\u6578\u64da\u3002\u9019\u610f\u5473\u8457\u5176\u4ed6\u61c9\u7528\u7121\u6cd5\u76f4\u63a5\u8a2a\u554f\u6216\u4fee\u6539\u9019\u4e9b\u6578\u64da\uff0c\u9019\u6a23\u53ef\u4ee5\u4fdd\u8b77\u7528\u6236\u7684\u96b1\u79c1\u548c\u6578\u64da\u5b89\u5168\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%82%99%e4%bb%bd%e8%88%87%e6%81%a2%e5%be%a9-gEIJKrlTgN\">\u6578\u64da\u5eab\u7684\u5099\u4efd\u8207\u6062\u5fa9<\/h2>\n<p>\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5099\u4efd\u548c\u6062\u5fa9\u6578\u64da\u5eab\u3002\u53ef\u4ee5\u901a\u904e\u5c07\u6578\u64da\u5eab\u6587\u4ef6\u8907\u88fd\u5230\u5916\u90e8\u5b58\u5132\u4f86\u5be6\u73fe\u5099\u4efd\uff0c\u7136\u5f8c\u518d\u5c07\u5176\u8907\u88fd\u56de\u4f86\u4ee5\u9032\u884c\u6062\u5fa9\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u5099\u4efd\u793a\u4f8b\uff1a<\/p>\n<pre><code>public void backupDatabase() {\n    File dbFile = context.getDatabasePath(DATABASE_NAME);\n    File backupFile = new File(Environment.getExternalStorageDirectory(), DATABASE_NAME);\n    try {\n        FileInputStream fis = new FileInputStream(dbFile);\n        FileOutputStream fos = new FileOutputStream(backupFile);\n        byte[] buffer = new byte[1024];\n        int length;\n        while ((length = fis.read(buffer)) &gt; 0) {\n            fos.write(buffer, 0, length);\n        }\n        fos.flush();\n        fos.close();\n        fis.close();\n    } catch (IOException e) {\n        e.printStackTrace();\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gEIJKrlTgN\">\u7e3d\u7d50<\/h2>\n<p>\u5728Android\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u5b58\u5132\u4f4d\u7f6e\u4e3b\u8981\u4f4d\u65bc\u61c9\u7528\u7684\u79c1\u6709\u76ee\u9304\u4e2d\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u96b1\u79c1\u6027\u3002\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904eSQLiteOpenHelper\u985e\u4f86\u5275\u5efa\u548c\u7ba1\u7406\u6578\u64da\u5eab\uff0c\u4e26\u4e14\u53ef\u4ee5\u8f15\u9b06\u5730\u9032\u884c\u6578\u64da\u7684\u5099\u4efd\u8207\u6062\u5fa9\u3002\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u6982\u5ff5\u5c0d\u65bc\u958b\u767c\u9ad8\u6548\u4e14\u5b89\u5168\u7684Android\u61c9\u7528\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u96f2\u7aef\u74b0\u5883\u4e2d\u7ba1\u7406\u6578\u64da\u5eab\u6709\u8208\u8da3\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528<a 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