Android device appears offline despite plugging in USB and switching on USB debugging

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I'm trying to run my Android app on a Samsung Galaxy Ace. Despite plugging in the USB and enabling debugging, when I try to run the app, Eclipse prints out a message saying 

[2012-07-14 22:56:19 - Cricket] Android Launch!
[2012-07-14 22:56:19 - Cricket] adb is running normally.
[2012-07-14 22:56:19 - Cricket] Performing nikhil.android.cricket.MainActivity activity launch
[2012-07-14 22:56:19 - Cricket] No active compatible AVD's or devices found. Relaunch this configuration                     after connecting a device or starting an AVD.

I'd like to add that I've been trying a lot but am unable to do anything. I tried killing adb and restarting it. Same error. Also, I am able to run it instantly when I connect my friend's Samsung Galaxy Note. But it won't run on my Samsung Galaxy Ace. I'd appreciate any help I can get on this.

android-emulator android
18 Answers

You might have to change the active USB computer connection setting. I had the same problem while running a Beanstalk custom rom based on Android 4.3. It was solved by switching from the default Media device (MTP) to Mass storage. The device was then automatically recognized by eclipse.

user_14393190
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