Develop Reference

Android adb devices does not detect my phone

I have Android Studio on Windows 8.1 and I want to run my android app on my Samsung Galaxy S7 phone.
Here are the details:
USB debugging in my phone is ON
adb version is 1.0.36
Under Device Manger -> Portable Devices -> My Phone, the status is 'The device is working properly'
I also installed Google USB driver in SDK Tools
My desktop can detect my phone since I can read and write files using Windows Explorer
I tried the following but still, adb devices still does not recognize my phone.
Tried USB Configuration MTP
Tried USB Configuration PTP
Tried using different USB cables
Tried restarting Android Studio before and after I plug my device to my desktop
Did I miss any configuration? Any help is appreciated!
Thanks!

I too had the same problem.
I tried the following and it worked.
Make sure Developer options and USB debugging is enabled on your device
Then on your Windows system.
Open device manager and locate your device's ADB Interface Driver
Right click and choose properties
Check in the general tab if your device is working properly
If it is not enabled then go to Driver tab and select enable
You may have to try enabling your device a few times(7-8)
If this works then you may see the below message on the General tab
This device is working properly.
You need to restart your computer before the changes you made to this device will take effect.
And that's how I made it work.

install drivers for your device and enable developer mode for your device

While the simple answer here is enable debug mode and install drivers, I think the answer should mention that if nothing works , do install google drivers. I stumbled on a video explaining the same, so adding the link here.
https://www.youtube.com/watch?v=asbkkV-IIZc
It helped fix my issue with oneplus device. Also, I could get the google usb drivers from android studio > sdk manager > sdk tools section.
Hoping to save someone else's time.

If you entered command adb devices in cmd and don't see your device ID, you can to open Windows Task Manager and close adb.exe task. Then you need to open again cmd and enter adb start-server and check devices again.
If you don't see your device ID after all then maybe problem in phone or drivers.

I found the answer here
I just need to install Samsung USB driver and it worked fine. I guess the Google USB driver did not work for me.
Also, I didn't know that I need to install a USB driver even if I can already read/ write files to my phone when I connect it to my desktop.
In Device Manager, I was looking at the wrong device (Portable Devices). I should have been looking at Other devices and there I can see that the Samsung phone has no drivers installed.
Thanks!

I had the same problem. Just try another USB port on your computer.

rebooting of the android device worked for me. Also, try to use the port USB 2.0

I was also facing the same issue on my MAC-OS. Restarting the MAC fixed the issue.
I also installed Android File Transfer to check if this was only a debugging issue or if it was an issue with the connected devices. Even AFT wasn't working so it was definitely not a debugging issue.
I also got this message on launching Studio after restarting the MAC.

sometimes windows firewall prohibit the adb.exe in platform-tolls folder
first check your phone and be sure about "usb debugging" is "on"
check that Default USB configuration is on "transferring files"
if you checked 1,2 but the problem is not solved you should reinstall platform-tools from "SDK manager" then "SDK tools" uncheck "Android SDK platform-tools" click apply then reinstall it by check "Android SDK platform-tools"

USB Debugging not working, adb ignores Nexus 7

For several weeks, I was able to connect my Nexus 7 2 to my computer running Windows 7, and Eclipse would recognize it, allowing me to run apps on it. The device also showed up when I ran the adb devices command. Every time I plugged the Nexus 7 into the computer, the tablet asked if I wanted to allow USB debugging at that time. (Oddly, it never asked me whether I wanted to always allow it from that computer, but I didn't care.)
I recently updated the tablet to Android 4.4.2. I also updated the Android SDKs through the Android SDK manager. Now, when I plug the tablet in, I do not get prompt about USB debugging on the tablet, and neither Eclipse nor adb can see that it is there.
Here is a list of things I tried to do, gathering ideas from various forums around the web.
Re-download the Asus drivers for the Nexus 7 and update the driver. However, Windows does not even recognize this as the right drivers for this device.
Turn USB Debugging off and on on the tablet, and also revoke all USB debugging permissions.
Change the connection mode from media device to camera
Switch the runtime from Dalvik to ART
Type adb kill-server followed by adb start-server in the command line
Delete eclipse and all the Android SDK and download them all over again
None of this worked. Any other ideas on what to try?

It turns out that the Nexus 7 definitely needs the Google USB Driver. Finding, downloading, and installing this driver worked perfectly.
Because Google's Android OEM drivers page does not include the Nexus 7 in its list of devices that need the Google USB driver, I had been trying the driver from Asus, which did not work. I did not try the Google USB driver because for some reason my SDK manager said it had downloaded the driver, but the driver was not to be found.
Finally I found I could download the Google USB driver from this page, which clarifies that all Google Nexus devices need this driver. Now I have successfully re-connected the tablet to ADB.
I submitted a documentation bug report to Google here in hopes that the OEM drivers page can be updated to reflect that all Google Nexus devices need the Google USB driver.

Nexus 7 tablet with Android 4.4.4. Settings > Storage > USB Computer Condition.
Two checkboxes: MTP and PTP. Uncheck both.

With your phone disconnected
In windows explorer - right click computer, go to manage, in computer management find and uinstall device driver (under Android device)
Download new drivers from http://developer.android.com/sdk/win-usb.html#top
Connect the phone, windows will try to install new drivers, install drivers manually with drivers downloaded as above
The above worked for me

For me, after updating to Android 4.4.2, it was critical that I connected the device as a Camera (PTP) rather than as a Media Device (MTP). Previously, before the update, I was able to connect as a Media Device (MTP).

The problem is that you have not all needed drivers (PC can recognise your phone like usb device but debugging would not work). I solved this problem in Android 4.4.4 by uncheking all items (MTP, PTP, UMS) from menu: storage->USB computer connections and than tick 'Media device(MTP). Now all works fine.

thank you Arthur, I found Nexus 7 tab not working even after unchecking or checking. Problem solved by unchecking USB Debugging (under developer options).. settings>Developer option> USB debugging. then check (put tick the MTP device):.storage->USB computer connections and than tick 'Media device(MTP)

Complete checklist:
Enable debugging onto the device
Select USB Connection as PTP (camera)
Install the driver from http://developer.android.com/sdk/win-usb.html

Before you try anything, make sure you update your Build related tools using your Android SDK Manager. Your adb might be outdated.

Phone not being recognised by Eclipse

I have a Samsung Galaxy S4 that I would like to deploy my app to using eclipse. However the device simply does not appear on the list of devices to deploy to.
I am using Windows 7 64-bit.
The phone appears as a drive when plugged in, allowing me to transfer files to and from the device.
The phone has developer mode and USB debugging switched on.
In the Android SDK Manager, the Google USB Driver appears as installed.
I have manually installed the usb driver located at \extras\google\usb_driver\.
This same device has been recognised and deployed to on other computers.
I have tried restarting the adb server in command prompt using adb kill-server and then typing adb start-server.
I have tried restarting both the phone and the computer.
My deployment screen simply thinks there is no android device:
Any ideas? Is there perhaps something I am missing here that is required for my android device to be properly recognised by eclipse?

First, is your device id showing up when you use adb devices
If it is, it's just a matter of restarting eclipse. Another cause could be that you're using the Google USB driver, whereas you should be using Samsung's Android USB driver, which can be found here:
http://developer.samsung.com/android/tools-sdks/Samsung-Andorid-USB-Driver-for-Windows

Get the drivers for your Galaxy S4 here:
http://developer.samsung.com/android/tools-sdks/Samsung-Andorid-USB-Driver-for-Windows
P.S. ya better got Nexus 5

You should install Samsung KIES, that have included some USB Drivers and something more, then you will able the possibility to eclipse sdk recognize your Phone, i was with the same problem, after i installed KIES everything worked fine, trust me.
KIES Download:
http://www.samsung.com/us/kies/

Android - Device not detected

I'm trying to test an Android Application on my Galaxy Nexus (from Google). I use Windows 7 Home Premium 64 bit and Eclipse Java EE IDE for Web Developers.
My device doesn't show in Eclipse DDMS view. My device also doesn't show when I run adb devices in cmd.
I have USB debugging enabled.
When I try to install the USB driver as shown here I get a message that my device software is up to date.
I also tried killing the adb server and starting it again.

Give the Universal Naked Driver a try? Be sure to follow the steps in the forum post.

Nexus devices require the Google USB Drivers, you can get them through the SDK Manager.
If you have them installed and the device still is not detected try the following:
Use a different USB port (for me the USB 3.0 port is always making problems)
Restart the device and the computer
Restart ADB
Also take a look here, which explains how to install drivers for the Nexus S.

I had a similar problem. I could not get my device to show up in my Eclipse devices window. When I typed adb devices, no devices were discovered. Fortunately, I discovered this website. It basically had me install a generic driver for my Motorola (Android 2). It had other drivers for Samsung and other manufacturers. After the install, my Motorola phone became visible with ADB.

Problem installing Android USB driver on Galaxy SII

I want to install the Android USB driver for my Galaxy SII on a Windows 7 Enterprise x64 SP1 machine.
My phone is detected and listed in the device manager as "Other devices" and the status is "The drivers for this device are not installed. (Code 28)".
As I want to install the USB driver I choose "Update driver" and browse to the directory containing the driver, and here's the problem. Windows doesn't find anything, it just says
Windows was unable to install your
SAMSUNG_Android
Windows could not find driver software
for your device.
I can't remember ever having such problem with this... I have set the phone to "USB-troubleshooting" (or what the correct term is in English..) and the drivers previously installed for using it as a mass-storage-device are unistalled.
If anyone knows a solution to this problem and could forward it to me I would greatly appreciate it!
Thank you!

Try to install the driver from Kies, maybe...

Sometimes the Kies reinstallation itself does not help (as happened in my case). I was not able to Update drivers via Device Manager either. Following procedure worked for me (WinXP Prof SP3 32-bit):
I disconnected the phone.
I uninstalled Kies and removed all drivers related to phone with use of USBDeview
I installed Kies
I loaded Kies
I selected “Tools > Troubleshoot connection error” to force drivers install and waited, operation took several minutes
I connected phone in MTP mode (USB Debug mode was off). Windows installed some drivers automatically.
I disconnected phone and reconnected it with USB Debug mode on. Windows installed more drivers automatically (including Samsung Android ADB Interface)
I restarted the computer.
It seems it is vital not to plug the phone in before Kies installation is finished.

I've tried both JohnyCash and Phils answers, but still didn't manage to fix the problem. After couple lost hours, here is how I fixed it:
Go to device manager, select GT I9100 from the list, right click > properties, select Update driver, then Browse my computer for software, then Let me pick from a list of device drivers on my computer, select SAMSUNG Electronics Co., Ltd. > SAMSUNG Android ADB Interface, and install it.
adb was able to see the device after this, finally!

1) Enable USB debugging on your device.
2) Connect your device with a USB cable to your computer. Your Windows OS (vista or win7) will automatically install the required drivers.
3) You can check of the device is connected by executing adb devices from your windows command prompt. It should list the serial no. of your device.

Windows 7 for a Moto G and Samsung make sure USB debugging is disabled. Plug phone in USB. Windows will connect and install a driver to access phone.
Disconnect phone from USB. Enable USB debugging in developer options.
Connect USB again. No Windows installs ADB drivers. All shoulld work.

Enable usb debugging in developer options in phone.
Connect the phone to Computer.
Install the driver Samsung USB driver from the following site.
http://developer.samsung.com/technical-doc/view.do?v=T000000117
This will solve the issue.