android与mysql数据库同步

// 定义一个数据模型类
public class User {
    private int id;
    private String name;
    // 省略getter和setter方法
}

// 定义一个数据同步服务
public class SyncService extends Service {
    private static final String TAG = "SyncService";
    private HandlerThread handlerThread;
    private Handler backgroundHandler;

    @Override
    public void onCreate() {
        super.onCreate();
        handlerThread = new HandlerThread("SyncServiceThread");
        handlerThread.start();
        backgroundHandler = new Handler(handlerThread.getLooper());
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        backgroundHandler.post(new Runnable() {
            @Override
            public void run() {
                syncData();
            }
        });
        return START_NOT_STICKY;
    }

    private void syncData() {
        // 连接MySQL数据库
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://your_server_ip:3306/your_database", "username", "password");

            // 查询数据
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT * FROM users");
            List<User> users = new ArrayList<>();
            while (rs.next()) {
                User user = new User();
                user.setId(rs.getInt("id"));
                user.setName(rs.getString("name"));
                users.add(user);
            }

            // 将数据保存到本地数据库
            // 省略具体实现

        } catch (Exception e) {
            Log.e(TAG, "Sync data error: " + e.getMessage());
        } finally {
            if (conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    Log.e(TAG, "Close connection error: " + e.getMessage());
                }
            }
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        handlerThread.quitSafely();
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}