I don't think there is a way to keep your tablet from powering on when plugging it in. Once it does power on you can just power it down while leaving it plugged in.
Sent from my Nexus 7 Flo running Odex SinLess ROM 4.4.2 with ElementalX kernel using XDA Premium 4 mobile app
Why you want to turn if off why charging, mine turns on just for a seconds then the screen turns off again, I'm fine with that
Nam Huy Linux http://namhuy.net
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