创建数据库表结构的实体类.示例代码: @DatabaseTable(tableName = "user")

public class User {

@DatabaseField(generatedId = true)

private int id;

@DatabaseField(columnName = "name")

private String name;

@DatabaseField(columnName = "age")

private int age;

@DatabaseField(columnName = "tel")

private String tel;

public User() {

}

public User(String name, int age, String tel) {

this.name = name;

this.age = age;

this.tel = tel;

}

}

创建OrmLiteSqliteOpenHelper的实现类.示例代码: public class UserDBOpenHelper extends OrmLiteSqliteOpenHelper {

public UserDBOpenHelper(Context context) {

super(context, "user.db", null, 1);

}

@Override

public void onCreate(SQLiteDatabase database, ConnectionSource connectionSource) {

try {

// 创建表

TableUtils.createTable(connectionSource, User.class);

} catch (SQLException e) {

e.printStackTrace();

}

}

@Override

public void onUpgrade(SQLiteDatabase database, ConnectionSource connectionSource, int oldVersion, int newVersion) {

try {

// 更新表

TableUtils.dropTable(connectionSource, User.class, true);

onCreate(database, connectionSource);

} catch (SQLException e) {

e.printStackTrace();

}

}

private static UserDBOpenHelper instance;

public static synchronized UserDBOpenHelper getInstance(Context context) {

if (instance == null) {

synchronized (UserDBOpenHelper.class) {

if (instance == null) {

instance = new UserDBOpenHelper(context);

}

}

}

return instance;

}

private Daodao;

// 获取操作数据库的DAO

public DaogetUserDao() throws SQLException {

if (dao == null) {

dao = getDao(User.class);

}

return dao;

}

@Override

public void close() {

super.close();

dao = null;

}

}

获取数据库的DAO对象, 即可进行增删改查的操作.示例代码: UserDBOpenHelper helper = new UserDBOpenHelper(this);

Daodao = helper.getUserDao();

User user = new User("zhangsan", 12, "13212345678");

// 增

dao.create(user);

// 改

dao.updateRaw("update user set tel = '18882348888' where name = ?", new String[]{"王武"});

// 查

Listquery = dao.queryForEq("name", "王武");

// 删

dao.deleteById(2);