左晓为主开发手持机充值管理机
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package com.dayu.general.dao
 
import android.content.Context
import android.os.Environment
import androidx.room.Room
import com.dayu.general.activity.BaseActivity
import java.io.File
 
class BaseDaoSingleton {
 
    companion object {
        var baseDao: AppDataBase? = null
        var AsynchBaseDao: AppDataBase? = null
        @JvmField
        val SqlitePath: String =
            Environment.getExternalStorageDirectory().absolutePath + File.separator + ".dayu" + File.separator + "data" + File.separator
        fun getInstance(context: Context): AppDataBase {
            if (baseDao == null) {
                baseDao = Room.databaseBuilder<AppDataBase>(
                    context,
                    AppDataBase::class.java,
                    SqlitePath + "ConfigurationData_generalV1"
                ).allowMainThreadQueries().build()
            }
            return baseDao as AppDataBase
        }
        fun getAsynchInstance(context: Context?): AppDataBase? {
            if (AsynchBaseDao == null) {
                AsynchBaseDao = Room.databaseBuilder<AppDataBase>(
                    context!!,
                    AppDataBase::class.java,
                    SqlitePath + "ConfigurationData_generalV1"
                ).build()
            }
            return AsynchBaseDao
        }
    }
 
 
 
 
 
//    companion object {
//        fun getAsynchInstance(baseActivity: BaseActivity): AppDataBase? {
//           return getAsynchInstance(baseActivity)
//        }
//    }
}