[Android][Resolved] Android device offline in android studio with windows platform

Version

• Android Studio 2.2.3
• Windows 8

Step 1

If your android device is detected but shows offline, you should disconnect your connection to your computer first (Either it's via USB or Wi-Fi)

Step 2 

Close Android Studio.

Step 3

Kill ALL adb.exe processes.
(For example, Press "CTRL"+"ALT"+"DELETE" and then select Task Manager, right click adb.exe and select "End task".)

Step 4

Restart Android Studio

Step5

Restart your Android device and connect it to your computer via USB or wifi. (I use USB cable).

Reference

http://stackoverflow.com/questions/14993855/android-adb-device-offline-cant-issue-commands