I know, it's so. But I don't understand, why?
Why not simply send queries to server periodically? Sure, it may discharge battery and increase internet traffic. I understand it. But how usage of Google Cloud Messaging can eliminate this problems?
I have found an answer. But it isn't pretty clear for me.
Can anyone give me a clear explanation?
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os 与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
