{"id":58371,"date":"2024-10-12T20:11:36","date_gmt":"2024-10-12T12:11:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/58371\/"},"modified":"2024-10-12T20:11:37","modified_gmt":"2024-10-12T12:11:37","slug":"android-%e7%b0%a1%e5%96%ae%e6%93%8d%e4%bd%9c-sqlite-%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9a%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a-android%e8%ae%80%e5%8f%96sqlite%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/58371\/","title":{"rendered":"Android \u7c21\u55ae\u64cd\u4f5c SQLite \u6578\u64da\u5eab\uff1a\u8b80\u53d6\u6578\u64da (android\u8b80\u53d6sqlite\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"android-%e7%b0%a1%e5%96%ae%e6%93%8d%e4%bd%9c-sqlite-%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9a%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a-DAeMnYDHTt\">Android \u7c21\u55ae\u64cd\u4f5c SQLite \u6578\u64da\u5eab\uff1a\u8b80\u53d6\u6578\u64da<\/h1>\n<p>\u5728 Android \u958b\u767c\u4e2d\uff0cSQLite 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id=\"%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%92%8c%e8%a1%a8-DAeMnYDHTt\">\u5275\u5efa\u6578\u64da\u5eab\u548c\u8868<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b SQLite \u6578\u64da\u5eab\u548c\u4e00\u500b\u8868\u3002\u9019\u901a\u5e38\u5728\u4e00\u500b\u7e7c\u627f\u81ea <code>SQLiteOpenHelper<\/code> \u7684\u985e\u4e2d\u5b8c\u6210\uff1a<\/p>\n<pre><code>public class DatabaseHelper extends SQLiteOpenHelper {\n    private static final String DATABASE_NAME = \"example.db\";\n    private static final int DATABASE_VERSION = 1;\n    private static final String TABLE_NAME = \"users\";\n    \n    public DatabaseHelper(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 \" + TABLE_NAME + \" (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 \" + TABLE_NAME);\n        onCreate(db);\n    }\n}\n<\/code><\/pre>\n<h3 id=\"%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-DAeMnYDHTt\">\u63d2\u5165\u6578\u64da<\/h3>\n<p>\u5728\u8b80\u53d6\u6578\u64da\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u63d2\u5165\u4e00\u4e9b\u6578\u64da\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u4f86\u63d2\u5165\u6578\u64da\uff1a<\/p>\n<pre><code>public void insertUser(String name) {\n    SQLiteDatabase db = this.getWritableDatabase();\n    ContentValues values = new ContentValues();\n    values.put(\"name\", name);\n    db.insert(TABLE_NAME, null, values);\n    db.close();\n}\n<\/code><\/pre>\n<h3 id=\"%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a-DAeMnYDHTt\">\u8b80\u53d6\u6578\u64da<\/h3>\n<p>\u73fe\u5728\u6211\u5011\u4f86\u770b\u770b\u5982\u4f55\u5f9e SQLite \u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u6578\u64da\u3002\u53ef\u4ee5\u4f7f\u7528 <code>query()<\/code> \u65b9\u6cd5\u4f86\u7372\u53d6\u6578\u64da\uff1a<\/p>\n<pre><code>public List getAllUsers() {\n    List users = new ArrayList();\n    SQLiteDatabase db = this.getReadableDatabase();\n    \n    Cursor cursor = db.query(TABLE_NAME, new String[]{\"name\"}, null, null, null, null, null);\n    if (cursor != null) {\n        while (cursor.moveToNext()) {\n            users.add(cursor.getString(cursor.getColumnIndex(\"name\")));\n        }\n        cursor.close();\n    }\n    db.close();\n    return users;\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 <code>Cursor<\/code> \u4f86\u904d\u6b77\u67e5\u8a62\u7d50\u679c\uff0c\u4e26\u5c07\u7528\u6236\u540d\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-DAeMnYDHTt\">\u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u5728 Android \u4e2d\u7c21\u55ae\u64cd\u4f5c SQLite 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