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

Question

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.

What does 'adb devices' list? The Ace normally runs Android 2.2 which being rather old might not be compatible with the application you built (I forget if compatibility gets checked or not in this case) — Chris Stratton, Jul 14 '12 at 17:37
adb lists the Galaxy Ace device 15 times. The first 14 times it shows the device as 'offline' The last time, it says 'online'. Oh, and I am running 2.3.3 which is supported by the application I am trying to run. — user1210233, Jul 14 '12 at 17:54
I can't believe it's written "AVD's", I guess I need to call the apostrophe police. — jeremy, Mar 14 '13 at 16:21

score 32 · Accepted Answer · edited Feb 04 '13 at 10:03

32

Go to DDMS in Eclipse IDE.

There is one menu: Expand that menu and select the Reset adb option.

Wait for a few seconds, it will reset your selected ADB device.

edited Feb 04 '13 at 10:03

slhck

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answered Jul 14 '12 at 18:03

mobile

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Excellent!!! Thank you very very much! Can't believe I struggled so much with this simple thing. – user1210233 Jul 14 '12 at 18:26

score 5 · Answer 2 · answered Dec 29 '13 at 10:37

5

Just reboot the phone, it will solve your issue. no need to adb restart is required.

answered Dec 29 '13 at 10:37

UMAR-MOBITSOLUTIONS

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score 1 · Answer 3 · edited Dec 27 '13 at 17:10

To install the Android USB driver on Windows 7 for the first time:

Connect your Android-powered device to your computer's USB port.
Right-click on Computer from your desktop or Windows Explorer, and select Manage.
Select Devices in the left pane.
Locate and expand Other device in the right pane.
Right-click the device name (such as Nexus S) and select Update Driver Software. This will launch the Hardware Update Wizard.
Select Browse my computer for driver software and click Next.
Click Browse and locate the USB driver folder. (The Google USB Driver is located in \extras\google\usb_driver.)
Click Next to install the driver. Or, to upgrade an existing Android USB driver on Windows 7 with the new driver:

score 1 · Answer 4 · answered Dec 14 '12 at 19:28

I also faced the same problem with Samsung Google nexus. I use Mac and I followed these steps to solve my problem

If you are developing on eclipse skip step 2

1: Enable USB debugging on your phone.
for lesser than 3.2 version go to Settings->Applications-> development
for versions 4.0 and higher its in Settings->development
for 4.2 its hidden. Go to Settings->about phone and tap build number 7 times (message will appear that you are a developer now)

2: In your manifest file add android:debuggable="true" to the application element

score 1 · Answer 5 · answered Nov 17 '13 at 00:48

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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.

answered Nov 17 '13 at 00:48

nikos.t

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Very useful answer I've got a Samsung Galaxy S5 and once I change this setting it worked. Thank you. The phone will ask you to accept a Key from the computer (Mac) connected to it, and afterward it'll work. – monn3t Aug 28 '14 at 17:28

António Almeida · Answer 6 · 2014-03-14T11:29:18.227

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Windows:

Start Menu button > type: cmd

Problem, the device is offline:

adb devices

List of devices attached
07952b41offline

adb kill-server
adb start-server (Wait some seconds ...)
adb devices

List of devices attached
07952b41device

edited Mar 14 '14 at 11:29

answered Mar 14 '14 at 10:55

António Almeida

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score 1 · Answer 7 · answered May 29 '14 at 02:34

I tried everything in this list to no avail, with a Samsung galaxy 5 (4.4.2). The only way I got it to work finally was to select the option to "revoke USB debugging authorization" which caused my phone to prompt me to authorize my computer to debug with it -- only then did it appear "online."

Installing the newer newer google / samsung drivers with the enhanced usb debugging security seems not to trigger an authorization prompt by itself. Seems you need to help it along by revoking all previous authorizations even on a new phone.

Tried everything and this worked! With the cable plugged in, I actually turned off USB debugging, then turned it back on and when I did it asked me to authorize. i did and whalla! — johnw182, Jul 26 '15 at 22:08

score 1 · Answer 8 · answered Jun 05 '14 at 20:51

I had this problem with my new updated to Kitkat GT-N7100. I tried everything

unhidden developer menu & enable USB debugging
reset ADB
installing latest USB device driver
installing laest KIES

none worked.

Device always looked offline in ddms.

If you tried all this and still no use then try this:

http://www.droidextra.org/2013/12/24/solved-fix-adb-devices-offline-100-working.html

It worked for me.

Akif,

score 0 · Answer 9 · answered Jan 28 '13 at 05:53

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if your Samsung mobile driver not install successfully then also this problem may occur

so download driver from following link and install it in your PC link

answered Jan 28 '13 at 05:53

Smily

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score 0 · Answer 10 · answered Feb 22 '13 at 10:08

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In AndroidManifest.xml, see that your minSdkVersion and targetSdkVersion match your device.

answered Feb 22 '13 at 10:08

love2script12

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score 0 · Answer 11 · answered Feb 26 '13 at 07:13

There may be no problem with Eclipse. Try running adb shell and see if it connects to your device. If it doesn't, this may signal any number of problems: with your USB port (try a different one and/or unplugging other peripherals), with your OS (try restarting), with your USB cable (try a different one), or the phone (try rebooting it or try a different one).

Eclipse is only the last link in the chain.

score 0 · Answer 12 · edited May 16 '13 at 10:08

I had same problem with my HTC phone, which works well with other app until I use the android google play services for maps v2. You may find the link below for how to install the sample.

http://nlabs.wordpress.com/2012/12/13/the_maps_sample_from_google_play_services/

I tried the suggestions made in this thread with no progress.

I then found my error that I did not overwrite the default setting below, but instead I add my entries. So I made the correct, and still got the same error.

<meta-data
    android:name="com.google.android.maps.v2.API_KEY"
    android:value="inter your code" />

I then run the debug mode. It worked. Once at the HTC, I was prompted to install the 'Google Play Services', which is expected and install works.

score 0 · Answer 13 · answered Jul 17 '13 at 09:07

0

Just do one thing change you minsdkVersion to 8,in your manifest file it surely works....

> android:minSdkVersion="8"

answered Jul 17 '13 at 09:07

K.T.

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score 0 · Answer 14 · edited May 23 '17 at 11:54

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You need to "reset ADB". After that your device may ask

Allow USB debugging?

On that screen, checking

always allow from this computer

may resolve your problems in the future for that device and computer. See more info: https://stackoverflow.com/a/16224992/143808

edited May 23 '17 at 11:54

Community

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answered Sep 19 '13 at 09:50

Mehmet Melik Kose

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score 0 · Answer 15 · edited Mar 14 '14 at 18:33

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First download the USB driver for your android phone from their respective site. For samsung phone you can use this link.
Click on reset abd.
Reboot your phone.

This worked for me when I encountered the same problem.

edited Mar 14 '14 at 18:33

António Almeida

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answered Dec 28 '13 at 05:45

user3137648

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score 0 · Answer 16 · answered Sep 23 '14 at 17:45

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using newest adb helped, thanks Akif. use kill-server and then start-server with newest adb. also it will fix some other issues.

answered Sep 23 '14 at 17:45

Dmitry Bryliuk

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score 0 · Answer 17 · answered Feb 04 '15 at 13:50

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Open Window Task Manager and and close adb.exe. Resolve my issue. And also reset USB Debugging.

answered Feb 04 '15 at 13:50

Zar E Ahmer

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score -3 · Answer 18 · answered Mar 20 '14 at 06:54

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No need of doing this all .

Just restore your pc to earlier time . it is on control panel,system and security.

answered Mar 20 '14 at 06:54

Sourav Saica

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

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