LiteORM的使用(1)

SQLite是一种轻量级数据库,经常在Android开发中使用.LiteOrm是一个专为 Android 设计的轻量级、高性能的ORM(对象关系映射)框架,通过该框架可以通过简洁的代码对SQLite数据库进行增删查改等操作.Android开发中使用LiteOrm的步骤如下:

(1)下载lite-orm-1.9.2.jar文件,并放入Android项目的jniLibs目录;

(2)在项目中定义LiteOrm_Manager类:

public class LiteOrm_Manager {
    private static volatile LiteOrm_Manager s_instance;
    private static LiteOrm lite_orm;
    public LiteOrm_Manager(Context context) {
        if (lite_orm == null) {
            DataBaseConfig config = new DataBaseConfig(context, XXXApplication.database_name);
            config.debugged = XXXApplication.is_debug_orm;
            config.dbVersion = XXXApplication.db_version;
            lite_orm = LiteOrm.newSingleInstance(config);
            LiteOrm lite_orm = LiteOrm.newCascadeInstance(context, XXXApplication.database_name);
        }
    }

    public static LiteOrm_Manager get_instance(Context context) {
        if (null == s_instance) {
            synchronized (LiteOrm_Manager.class) {
                if (null == s_instance) {
                    s_instance = new LiteOrm_Manager(context);
                }
            }
        }
        return s_instance;
    }
    ...
}

通过以上代码,获得一个数据库的实例;

(3)在Application或者MainActivity类中定义下列的方法并调用,获得LiteOrm_Manager类的实例:

    private void init_application(){
        if (lite_orm_manager == null) {
            lite_orm_manager = new LiteOrm_Manager(getApplicationContext());
        }
    }