About MIUI V5 functions to achieve dynamic icons

I have always felt MIUI V5 most attractive feature is the dynamic of my icons that I have been very envious of IOS place
Calendar dynamic may feel small, but dynamic weather , and it is very convenient, do not open the application , you can still get the information in real time , on this point magnetic stickers windows phone icon is this advantage .
seemingly practical good features , but why major mobile phone manufacturers custom OS does not do it ? This is the place I have been in doubt .
I probably learned some android development, know that if you want to modify an application 's icon , then usually need to recompile , so perhaps this is difficult.
but MIUI V5 turn this reality. It is amazing , is it dynamically recompile it?
Internet was seen say that this feature is actually a 1X1 in the widget, is it really ?
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To be honest I do not know what mark did not come into contact with God, waiting for the big
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how no one back ?
do not know?
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completely wooden people know ah - , cups
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me wrong - there really nobody knows
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nobody studied before?
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1X1 's not just a widget, she can directly call the internal data to be displayed as a graphical animation !