Android device chooser - My device seems offline

Question

I have developed an application and i was planning to deploy it to my HTC Desire  I have installed USB driver  I turned on USB debugging on the phone and choosed charge only when phone plugged-in  When I run application Android device chooser show my device offline  I am stuck at this point  Any help would be appreciated   I develop at Eclipse Helios on Windows 7  64bit

User · Answer

When you attach your android with your PC, you will get couple of options mentioning the way you may connect with the computer. In my case, I am using HTC Wildfire and it displays

Charge only
HTC Sync
Disk Drive
USB Tethering

I was also facing the problem the Question states and I have tested the way David Caunt answered but yet device was showing offline. *

I rechecked the options and found I selected the Disk Drive option. Then I changed the option to Charge only mode and again follow David Caunt's steps. I don't know why, but this time it worked for me.

User · Answer

Did you accept the fingerprint for your computer on the device   When you attach your PC a prompt will be displayed on your phone device to add this fingerprint token and trust it

User · Answer

I have your same problem  I tried all the solutions I found on this site  At the end I found out that my PC front USB is the cause of the offline state of my phone  I know it s dumb    but switching the USB cable from a front USB port to a back one worked for me

User · Answer

This was the solution for me  Connect as you would to debug via wifi   Make sure your phone is connected by usb  Then open your command prompt as admin and navigate to YourAndroidSdkLocation platform-tools  and do   adb tcpip 5555 adb connect YOUR DEVICE IP   At this point my device successfully came online  giving me the option to debug via both usb or wifi

User · Answer

I found that my Pantech Burst had a problem similar to what you all described  After reading through many such posts everywhere I noticed many people reported having to use a USB cable that they got else where other than the phone manufacturer  What I decided to do was use a different USB port on my PC and the problem was fixed  My Pantech Burst does not go offline in the middle of a debug session any more  The port I used to use was the front port on my box  but it was wired to the motherboard without shielding inside the box  Now I use the port on the back of the box that is directly attached to the motherboard

User · Answer

I can t say for sure but after hours of random disconnections from my device  especially when trying to debug anything   I switched to a USB port that is NOT USB3 0 and that seem to solve the issue

User · Answer

I m running JellyBean  I noticed for the first time that there is a  Developer Options  slider at the top of the Developer Options menu  Note that I m not talking about the USB Debugging checkbox - which is a different option  I slid the Developer Options checkbox to  on  and was back in business  Unfortunately  I m not sure if this is the whole story because I also ran the adb kill start commands that David Caunt pointed out above

User · Answer

I m on OSX and have a macbook retina   Switching the USB port that my device was plugged into  for some reason  fixed my issue

User · Answer

Yes  similar behavior on the Droid 2 Global   Seems as though you can get the USB recognized if you reboot out of recovery   But  otherwise once you are at console  adb devices shows the device as offline   Not sure how to remedy this problem   But  as long as you aren t hacking the phone  the I tried it with normal power supply with the battery dropped  and it powered up   So it is getting power   I am not sure if its CyanogenTeam that just forgot to put some sort of indicator   or what but  don t worry   Your battery is charging   However  pushing  apks and other stuff is not easy anymore    But hey  when rooting a phone for a friend do you necessarily want them pushing anything   Anywhere

User · Answer

I had a similar problem in Android Studio 0 2 2  IntelliJ   On Windows 7 my Nexus 7 did not appear in device chooser although it was fine on my Mac  I could also browse my Nexus 7 in Windows Explorer   In the end I needed to install the Asus USB drivers for the Nexus 7  link     After that ADB detected my Nexus and everything worked as expected

User · Answer

Tried a lot of the solutions without success and then I   Clicked  Revoke USB debugging authorizations Unchecked  USB debugging  Checked  USB debugging

User · Answer

I had the same problem with my Galaxy S4  when connected to a Win 7 64 machine  not showing up as an available device in Eclipse   Tried rebooting phone  starting restarting adb  switching from usb 3 to usb 2 port    none of which helped   Downloaded Samsung drivers from here  http   www samsung com us support owners product SGH-I337ZWAATT  installed drivers and then when I reconnected my phone  windows installed the new drivers  took a min or so    I then restarted Eclipse and was able to see the phone and run the app     I also tried this with the usb 3 port and it works as well

User · Answer

Mine was offline   I unpluged and pluged again but with the mobile awake  a window opened asking permission   So try to plug and unplug but with the phone awake

User · Answer

On the Galaxy Note 3 in debugging mode with Windows 7 I had problems with the device  offline  in the Android ADT  Eclipse  DDMS  Devices  window  By selecting USB 3 0 as USB connection in the Note 3 pull down control panel the device came online    Obviously applicable for a computer with USB3 ports

User · Answer

Faced same problem in Windows with Nexus 7 device   Simply killing adb exe process from Task Manager solved my problem

User · Answer

Had the same issue on my HTC Incredible S  The problem was that I used a third party docking station to connect  Connecting the phone directly solved the problem

User · Answer

I get the  Device offline  error a lot when debugging via wifi  Whenever I want to go back to debugging with usb  I have to type adb usb  but this command only works if the device is connected to adb via wifi  if the device loses connection for some reason  then it has to be restarted  which is a pain  Simply resetting ADB doesn t solve this issue either   To work around this  I downloaded an adb terminal application from Google Play  https   play google com store apps details id jackpal androidterm amp hl en  I then open up the terminal application on my device while my device is connected to my computer via USB  and type in   adb kill-server adb start-server adb usb   I then unplug and replug my device from my computer  after which the issue is fixed  No annoying device restart needed

User · Answer

I also had a smilar problem  I had Samsung galaxy S  GT I9000   I had the drivers installed but the phone showed offline in Android Studio    Restarting the device while connected to PC solved the issue

User · Answer

I was trying to use a Nexus 10 to debug through eclipse  I ve been struggling to get eclipse to recognize it  Finally I tried  adb kill server     adb start server  command  which at least got Eclipse to show the device  although still only offline    Then I tried switching USB connection to one in the back of the PC  and it worked       Note  after I switched to rear USB port  I was prompted on the Nexus to allow debugging from my PC  once I allowed  the app popped up

User · Answer

Happened to me with a Motorola MZ 601  Xoom   I tried everything suggested in other answers  but the only thing that fixed the issue for me in the end was to use a different USB port  Mind you  the same device had been connected to the other USB port before and it worked  So  if all else fails  consider using a different port

User · Answer

Removing the USB cable for about 5 seconds and reconnecting also solves the problem  Maybe you have to try one or two times

User · Answer

fastest way is  Settings -  Developer Options -  Android Debugging  turn off and then on again  tested on CyanogenMod 11

User · Answer

this is the only solution that worked for me  besides rebooting   go to device manager open universal serial bus controllers right click USB Root hub  select disable  and then enable again

User · Answer

Go to DDMS- Devices- Click on View Menu Down arrow on right side -  select  reset adb  option it will work   In Android Studio  open the Android Device Monitor  Tools- Android  and click on the arrow on the  Devices  tab to reset the adb

User · Answer

I have HTC wildfire and disabling and enabling the debugging worked fine for the  offline  problem  The error does not show up   However I ran into a new problem when trying to import a python file with sl3a    no moduled named android   explained here  That being said  I still cannot run this android py file located somewhere on the SD Card python folder  I can connect with androidscreencast jnlp and it works fine

User · Answer

I fixed it by deleting unwanted applications games from my device--make sure there is more than 15mb free space on the device    It will work

User · Answer

Updated the Android SDK platform tools using SDK Manager  in Eclipse    Works for me

User · Answer

I had the same issue and i solved it by resetting the adb on eclipse   on eclipse Go to   DDMS top right corner  -  Devices -  reset adb

User · Answer

I had the same problem several times - just rebooting solves this

User · Answer

I tried everything mutliple times in multiple orders  then stumbled across my particular answer   Use a different USB cable - suddenly everything worked perfectly    Another potential answer for people that I found - make sure there is more than 15mb free space on the device

User · Answer

I ve seen this happen a few times on my HTC Desire  I ve never figured out whether the problem is in adb or the device but I usually do the following    Restart adb by issuing  adb kill-server  followed by  adb start-server  at a cmd prompt Disable and re-enable USB debugging on the phone Rebooting the phone if it still doesn t work    99  of my issues have been resolved with these steps

User · Answer

I have a Windows 7 desktop with a Google Nexus 7 connected to that  I also had the  offline  problem  Mine is resolved by revoking any previous authorization on Nexus  So now I get the prompt to authorize on Nexus--I am not saving the authorization for now at least--and I allow the authorization--and voila --Android SDK correctly shows the device as  asus-nexus 7-xxxx   HTH

User · Answer

I was having this problem and solved by activating the PTP Connection  This option will appears when you connect you cable into your phone   Then you ll see a prompt which will ask you how to you want to you your USB    Use USB for      Transferring media files Transferring images Connecting MIDI devices Charging  I chose the second option  Transferring images   So  my phone has changed to ONLINE mode

[android] Android device chooser - My device seems offline

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