GreenDaoUtils工具类

最新推荐文章于 2022-10-12 14:13:41 发布

Alyson。

最新推荐文章于 2022-10-12 14:13:41 发布

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本文链接：https://blog.youkuaiyun.com/weixin_44570672/article/details/88780878

本文介绍了一个用于管理GreenDao操作的单例类实现。该类通过静态内部类的方式实现了懒加载，提供了设置数据库、获取数据库对象及会话等功能。适用于需要使用GreenDao进行数据库操作的应用场景。

public class GreenDaoManage {
    private static GreenDaoManage instance;
    private DaoMaster.DevOpenHelper devOpenHelper;
    private SQLiteDatabase db;
    private DaoMaster daoMaster;
    private DaoSession daoSession;

    private GreenDaoManage(){

    }
    public static GreenDaoManage getInstance(){
        if (instance==null){
            synchronized (GreenDaoManage.class){
                if (instance==null){
                    instance = new GreenDaoManage();
                }
            }
        }
        return instance;
    }
    public void setDataBase(Context context){
        devOpenHelper = new DaoMaster.DevOpenHelper(context, "yang-db", null);
        db = devOpenHelper.getWritableDatabase();
        daoMaster = new DaoMaster(db);
        daoSession = daoMaster.newSession();
    }

    public SQLiteDatabase getDb() {
        return db;
    }

    public DaoSession getDaoSession() {
        return daoSession;
    }
}