SQLite Kotlin

AssetDBOpenHelper

class SqlHelper(var mContext: Context) {
    val DB_NAME: String = "essays_eng.db"

    fun openDataBase(): SQLiteDatabase {
        val dbFile : File = mContext.getDatabasePath(DB_NAME)
        if (!dbFile.exists()) {
            val dir = dbFile.parentFile
            dir.mkdirs()
             mContext.assets.open(DB_NAME).use { input -> dbFile.outputStream().buffered().use { output ->
                    input.copyTo(output, 10240 )
                }
            }
        }
        return SQLiteDatabase.openDatabase(dbFile.path, null, SQLiteDatabase.OPEN_READWRITE)
    }

}

Should use FIRST START APP. IF database bug size please set delay time.