SystemMemoryLevel = SystemMemoryLevel or {}
SystemMemoryLevel.Low = 1
SystemMemoryLevel.Middle = 2
SystemMemoryLevel.Hight = 3
SystemMemoryLevel.Top = 4

SystemMemoryLevel.Cur = nil

function SystemMemoryLevel.Init()
	local memory_size = math.ceil(Util.GetSystemMemorySize()/1024)
	local lowMem,mediumMem,highMem = 1,2,3
	if SystemRuntimePlatform.IsAndroid() then
		lowMem = 6
		mediumMem = 7
		highMem = 9
	elseif SystemRuntimePlatform.IsIphone() then
		lowMem = 2
		mediumMem = 4
		highMem = 7
	end

	if memory_size < lowMem then
		-- Android 4G, IOS 1G
		SystemMemoryLevel.Cur = SystemMemoryLevel.Low
	elseif memory_size < mediumMem then
		-- Android 6G, IOS 2-3G
		SystemMemoryLevel.Cur = SystemMemoryLevel.Middle
	elseif memory_size < highMem then
		-- Android 8G, IOS 4G-6G
		SystemMemoryLevel.Cur = SystemMemoryLevel.Hight
	else
		-- Android 10-12G, IOS 无
		SystemMemoryLevel.Cur = SystemMemoryLevel.Top
	end
end