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Your question has some ambiguity. Bluetooth is a more energy efficient protocol than wifi. USB hardly uses any energy for the data protocol. However, with USB the laptop can charge the phone, as is mentioned here before. From the point of view of the phone, compared to bluetooth and wifi, the phone's power consumption with usb can be negative. From the ...


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Yes, it's definitely possible. Most USB chargers are fairly limited in their output and devices like tablets are not really designed to be used while charging, unlike laptops. You'd think it would be OK to simply sit and remain on while charging and unused, but perhaps the Nexus 7 does not have very good power management. You might want to look at having ...


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It's a bug in the app. Android has a thing called the media-scanner, which scans newly added files for metadata, so they can be included in media players, photo albums, etc. It relies on the app that creates the file signalling the media scanner process to scan the new file. If the app doesn't do this, the new file won't be added/visible. If you look at ...


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What you want to achieve is nearly impossible. You can get some approximations by using Airdroid app (lets you see your phone on the web browser from your desktop pc) or installing vnc server on your device and vnc client on your desktop pc, or using Pushbullet app. This last is used for notifications rather than absolute control, but you could give it a ...


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The trick is to add /. to the name of the folder you want to copy: adb pull /sdcard/. backup This copies the whole directory recursively.


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Yes usb tethering is the most efficient method as compared to other methods. It can be used to charge your phone while working. Wifi tethering consumes too much battery and bluetooth tethering is very slow.



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