package com.casic.endoscope.utils import com.casic.endoscope.base.BaseApplication class DataBaseManager private constructor() { companion object { //Kotlin委托模式双重锁单例 val get by lazy(mode = LazyThreadSafetyMode.SYNCHRONIZED) { DataBaseManager() } } private var gasValueBeanDao = BaseApplication.get().getDaoSession().gasValueBeanDao }