Develop Reference

Android Studio 2.1.1: "no usb devices or running emulators detected"

Suddenly my Android Studio stopped detecting all my devices, none of them is working. It happen from one execution to another. I've changed a few lines of code (1 min maybe?), hit run (instant run) and then I missed all my devices.
I'm using a Mac and as devices: Nexus 5x, Galaxy s6 and Oneplus One. What can be happening? I've checked previous questions here and tried all this:
Run configurations: no matter if I chose usb device or show the window, it does not work.
Tools > Android > Enable ADB integration: didn't help
Command line adb devices does not detect any either.
I've revoked and granted again USB authorizations. Still not working.
I've tried other apps I have, none work.
Restarted phones
Restarted android studio
Restarted computer
(Note: if I start an emulator it works, but I'd prefer to use physical device since I have to scan real barcodes)
Thanks a lot in advance.

On Lollipop 5.1
Go to About Phone
Click 7 times on Build Number. Now Developer options are enabled
Go back and Click Developer options
Enable USB debugging under Debugging.

Well, I've fixed. The problem in case any faces the same was a Stetho (http://facebook.github.io/stetho/) tab in chrome, the one you open by typing: chrome://inspect/#devices not sure about the reason because it's been open for 2 days now, but it was the cause, once I closed it, it worked.
Found this unaccepted answer here: macbook adb cannot open interface That for sure should be accepted.
EDIT: I've been able to replicate the problem. It happens when you have the devices tab open and try to run a second app that has stetho configured.

It happens if your device drivers not installed Please do this.
In Case of PC
Right click my computer select manage select device manager from left panel if your phone drivers not installed there will be yellow alert on driver right click on it select update driver software then select search automatically for update driver software.
Other
Please install the missing drivers of your phone.

I had the same problem . What I've done to solve it going to Setting >> Additional Setting >> Developer Option
Now select:
Developer option on
USB debugging on
Install via USB on
USB setting security on
Verify apps over USB

OK, what finally worked for me was to go into Settings\Developer options\Select USB Configuration and change it to PTP or MIDI....either one of those worked for me and all of the sudden my phone showed up and I was able to see and run my test app on my android phone.

This woorked for me
Go To Settings
Developer Options
Enable USB Debugging
Enable Verify Apps over USB
Select USB Configuration: Choose MIDI
I hope it also works for you

Android Studio - No USB devices detected

I tried to play Android Studio 2.0 with my mobile without success, what I did are:
In my mobile, Apps/gear icon/Settings/SYSTEM/{} Developer options/ Android debugging/, enable the Android Debug Bridge(adb) interface (set tick).
After plug in my mobile to my PC with a USB cable, I found A0001 in my Computer folder. Within A0001, I can see the files in my mobile.
In my PC, run Android Studio/bin/studio.exe, "Select Deployment Target" window shows with message "No USB devices or running emulators detected"
I have tried two different USB drivers but got no lucky.
Perhaps I should tell Android Studio where is my USB driver? But, how?
Can you help?

I had the same problem too and I managed to resolve it this way.
First, enable debugger mode in your android device.
Go to Device Manager from Start Menu and try to find ADB Interface with an error symbol on it. This generally happens because windows sometimes fail to load all the mobile device drives.
Next, Go to http://adbdriver.com/downloads/ and download the driver installer, unzip and run it.
Now go to Android Studio and you should find that everything is working fine.
Chill....

same here... but I hope you can avoid this problem the same way I Did.
There is an "universal ADB Driver for all Android Devices".
Yep... sounds like magic.
Just follow this link.
https://devs-lab.com/usb-adb-drivers-for-all-android-devices.html
Fun fact there is no "Step 5" in that article so I'll give you.
you have to enable "USB Depuration" from "Developer Options" connect your cellphone to computer as a "MTP storage" , after windows detected your cellphone as a "Portable Device" Execute ADBDriverInstaller.exe (that downloaded from devs-lab)
check the device list and your cellphone will say "Driver incorrectly", select your cellphone and press install.
Step 6: Once the process is completed, you’ll see something like the image that appears there (in the link).
I hope that somebody else work this

Go to Run > Edit Configurations...
Under Deployment Target Options select Show Device Chooser
Dialog from the drop-down-list
See picture for reference

After struggling with this problem for a while, I found that there are certain cables that can only charge your phone, and even though they seem to be working, they do not allow your phone to be used as a "Media Device" and therefore Android Studio does not detect it.

Go to
Tools | Android | Enable ADB Integration
Make sure it's enabled. When I upgraded to 2.X it was for some reason disabled for me and it took me hours to find it.

I just cannot beleive why it is so difficult! let me try again and please check my steps again:
I installed Android Studio 2.0, then run Computer/OS(C:)/....../Android Studio/bin/studio.exe.
The Android Studio window appeared in my working area Computer/OS2(J:)/Users/MyAccount/Desktop/.
I connected my mobile with my computer, Cpmputer/A0001/ appeared, from it, I can see the files in my mobile.
I clicked the run icon in the Android Studio window, a "Select Deployment Target" window apeared with message "No USB devices or running emulators detected".
(I got two USB ports and tried both but got the same result.)

Finally found the solution : )
1. Install device’s required driver. (for me it was motorola device
manager)
2. Download Google Usb Driver from SDK Manager
3. Open your phone's setting->developer options and turn on USB debugging.
4. connect your device to computer
5. Go to Device Manager from Start Menu and try to find if there is ADB Interface with an error symbol on it.
5.1. If yes, then right click on the ADB interface->Update driver
software->Browse my computer for driver software-> Let me pick from
a list of device drivers on my computer->Select Motorola ADB interface
5.2. Now one confirmation will pop up in your mobile, accept it
5.3. Now you should see no error mark beside the ADB interface in your
device manager

There are 3 steps to set up your phone for debugging:
1) Change your phone to developer's mode by going to Settings, About Phone, Software Info, Android Version - tap at least 7 times on the Build Number text. You will get a message saying you are now a Developer.
2) Enable USB Debugging in Settings - Developer Options. Make sure you are not connected to your USB port to see the USB Debugging option enabled, otherwise it will be disabled.
After you plug in your USB, swipe at the top of your screen, you will see USB Debugging on.
3) Make sure USB connection is set to Photo Transfer (or MTP - Transfer photos and videos). After you plug in your USB, swipe at the top of your screen, and you will see Tap to change USB options on the menu. Tap it, and select Photo Transfer option.

Perhaps your mobile manufacturer does not provide the proper driver.
Go to Device MAnager and look for: Android Composite ADB Interface. If it's there, the driver is properly installed. If not... You and I are on the same "wagon"...
I tell you: Acer? Never again.

USB debugging somehow got turned off under developer options on my Samsung. Turned it back on and it worked, but only by clicking on "debug app" instead of on "run app".

With me, when connecting the mobile to the pc, three options appeared on my mobile.
Charge this phone
Transfer Files
Transfer Images
I thought I should select "Transfer Files", but it dd not work
But it only when works I choose "Charge this phone"

Few ways to resolve this problem.
Case 1: Install PdaNet+ in your system. (worked for me).
Case 2: Enable the USB debugging option in your mobile. Setting > developer > Check "USB Debugging".
Case 3: Change from MTP to PTP.(sometimes vise versa works).

Question is Your development sdk no mobile version android sdk Platform.
For example, my android phone system is 6.0, i need download sdk Platform 6.0.

First, try to revoke the usb sessions in the developer options, then try downloading an oem usb driver
If then doesn’t help you can try opening the device manager on windows, right click on your phone, select uninstall. This worked for me if I had the same issue.

I couldn't find my android phone or any USB device I connect to my windows laptop on the hidden icons. Well, my mouse and phone could charge but I can't seem to see my phone in the File Explorer option.
I prefer running Apps using my phone rather than emulator in Android Studio and yet I couldn't see my phone when I connect using the USB.
This helped me solve all my problems after several hours of searching for solution.
Download Universal ADB Drivers - One size fits all Windows Drivers for Android Debug Bridge
Please use this link: https://adb.clockworkmod.com/
I hope this works for you like magic!
I can see all the devices I connect using the USB cable and my mouse receiver.

Samsung phone not getting detected by adt for a specific Android project

I have used my Samsung phone for running an android app(very basic app) once. I was trying to work on another app, but now, when I turn on the usb debugging in my phone and try running the new one, my phone doesn't show up in the CHOOSE A RUNNING ANDROID DEVICE list. I tried to run the previous app again, just to see if it works now, and surprisingly, it does ! I don't remember doing anything else other than turning on the usb debugging thing in my phone.
Any help would be appreciated :)
Thank you in advance.

be sure you have enabled usb debugging from your phone .....if yes follow this ..
First Install This Software on your pc then install apk on your phone
get it from here
http://www.mobogenie.com/product/mobogenie-pc.html

Try to enable ADB through command line tool .
For reference you can follow this link :See the link here
And if there is any further issues please comment below.

You need to install device driver for your Samsung devices After that you can restart your Eclipse & attach phone with usb.Now you can see the devices in devices list.

Connect phone by USB cable to your computer.Remember to set
android:debuggable="true"
in your AndroidManifest file
You'll also need "unknown sources" ticked under
Settings -> Application.
Try this link: http://developer.android.com/guide/developing/device.html
Connecting Your Own Device On Eclipse safely to run Application

Could not recognize my android device on mac

I am trying to connect my android device on mac to test application I developed.
First I installed USB driver, then I activated in my phone the developer option by tapping on Build Number and then tick USB debugging option.
Once I did all those steps when I connect my android mobile, my Mac still not recognize my device.
Any idea to solve it?

Maybe it's your USB cable, try another one.
There are two types of USB cables:
for supplying power only
for supplying power and data

I after few research and testing of existing solutions, I found mine, my issue was released while I have installed Android file Transfer for Mac

I experienced the same problem with a Moto X and my Macbook Pro. I tried many of the suggestions (installed Android File Transfer, tried different usb ports on my computer, Settings => Storage => USB computer connection => toggled between MTP and PTP, etc.). None of these other recommendations helped.
It finally worked when I tried a different micro-usb cable.
Bizarre. You definitely want to first enable Developer Options first by going to Settings => About Phone => tapping Build number 7 times to display Developer Options. From there, you want to enable USB debugging.

I found this solution to be helpful to resolve this problem
Connect your Android to your Mac via USB.
Unlock your Android's screen. ...
Swipe down to open the Android Notification Panel.
Tap the USB option in the Notification Panel.
Tap "File transfer" or "MTP."
Click the Go menu and select "Applications."
Double-click "Android File Transfer."
https://discussions.apple.com/thread/250023078

I had this problem. The only solution was to reboot my computer. Then it started working again.

Just to add my experience here. I had a similar problem with my mac book pro and my Google Pixel 1 device. For me when running adb devices locally, I was no longer showing my device on the list. I would see any emulators I had running, but not my physical device.
My solution and steps:
Go to the "Settings App"
Go to "Developer Options"
Revoke USB debugging Authorizations
Toggle Developer Options off / on
My device then prompted me to allow debugging from my computer and everything continued to work as expected. adb devices resulted in showing my connected device.
Hopefully, this will help someone else if the above does not.

Make sure to have debugging by usb enable on your device.
It is an option inside "Developer options"

I've recently (2018) started to have this issue, and have found the only way to get my device connected is to use a USB hub. I have not been able to track down a root cause but will edit this answer if I can find a solution rather than a workaround.

I connected my Android deceive with my mac:
1) If you use Android studio, you may update to latest version of 1.0.2 or 1.1 preview, because lower version have some problem with ADB connection.
2) You may restart your IDE once again.
3) You may go to settings -- storage -- three docs on the right up corner -- USB computer connection -- enable MTP

I have an HTC U11 and a MacBook Pro (2017). It used to work most of the time, but I experienced issues with it once or twice. Then a restart of the Mac solved the problem.
Recently I was not able to USB debug. adb devices gave nothing, even though my phone said I'm USB debugging (even asked if I wanted to).
After trying many things the solution was to connect my phone and run HTC Sync Manager (I also had to update it). Then it magically started to woek.
I hope it helps somebody.

check your android sdk tools, install your sdk-plateform-tools package.then it is ok

For me what fixed the problem is
i clicked on the notification "USB for file transfer" in the
notification panel on the phone
Clicked on "Transferring images"
Than I clicked on "Transferring files / Android Auto" and it was fixed.

Android Studio 0.2.5 Does not see Galaxy S4 as device

I've googled all over the place and have yet to find an answer. I have a new Galaxy S4 and just downloaded Android Studio. I'm trying to run my first Hello World app on my phone, yet Android Studio 0.2.5 does not see the device. I have enabled Dev mode on my S4 as I've read, but still no go. I even tried restarting my S4.
Anyone have any sort of idea what might be the issue?

I have a Galaxy S3 and initially I did not know what to do when I was in the same position as you are.
The Android page on making your device recognizable via USB is slightly misleading. So what is the way out ?
Well, download and install Samsung Kies and let it do its work. It will install all the necessary drivers to make your device recognizable.
Happy coding.

You're using Windows, you can try to go to Device Manager, right-click your phone, click Update Driver Software, then you should select Browse my computer for driver software, click Next and click Browse and locate the USB driver folder and point to your <android_sdk>\extras\google\usb_driver\ folder.
You can find more detailed instructions here.
I hope it can help you.

Make sure that "USB debugging" under Settings > Developer Options is checked. Then a security pop-up should appear to allow the computer to connect.