Develop Reference

android studio doesn't see USB connected device

Just to be clear, the device isn't locked or anything and it works perfectly for my friend who has the same android studio version. The problem isn't with detecting the usb device (by the computer), I can access the device's content just perfectly so it connects correctly to my computer but not to android studio.
When I try to run an application, the usb device doesn't show amongst the options.
Can someone please help me with this issue, knowing that my android studio is updated.
UPDATE:
the devices I used are: Samsung J2 and J3

Have you installed Universal USB Driver, if no then you will not see any device to connect. you can also install individual company device driver.
just try Universal USB Driver to connect all devices
Download from here Universal USB Driver

Open the Device Manager window from the control panel in your computer. In the Others/Unknown Devices tab you would see an unknown android device. Right click on it and update the driver and re-run android studio.

Make sure usb debugging is on in your device.
In Android Studio
Tools->Android->Enable ADB Integration
Enable ADB Integration
Then run app
Hope it will solve the problem

Enable your ADB in your Android
-> First go to Settings->Developer Options
-> Then On or Enable your ADB Mode

Just a Restart of Android Studio worked for me.
In my case it happened because of non-interaction in Android_Studio for long.
Else, Check with Run -> Edit Configurations -> Target.

I have the same problem and I use Samsung too.
I fixed it by installing the device driver from Samsung which you can download from Samsung's website
Note
You need to enable ADB mode(Like the second comment)
You need to set Target in Android Studio to > Open Select Deployment Target Dialog
to set Target : Run > Edit
Configurations > Targets > Open Select Deployment Target Dialog

The selected Device is Incompatible

I debug the app using my phone (not emulator) and the error pops up, as shown in attached photo below.
minSdk(API 19) > deviceSdk(API 1)

I have a device that uses Android 4.4.2 (API 19). It gave the same strange conflict stating the minimum was API 16 and it conflicted with an API 1 device.
This is what I did and it worked after some time. I'm not sure of the order (or the significance) of each step.
Verify that the "Android SDK Manager" had both "API 19 SDK Build-tools" and "Android 4.4.2 (API 19)" packages installed.
Set the /etc/usb/rules.d/51-android.rules has to be set by using running lsusb
and then entering the first four digits in the XXXX:XXXX pair of your device.
See the following answer for help
https://stackoverflow.com/a/28724457/149162
In the terminal, run adb kill-server then adb start-server.
After this, in the "Device Chooser" window, my device read that it was [UNDOCUMENTED] instead of [OFFLINE], but it was still incompatible and the OK button was disabled.
Plug the device in using a USB cord. Go into Settings/Developer options. (Turn on developer options, if showing. If not showing, turn on by tapping Settings/About Phone/Build number 7 times.) In "Developer options" tap "USB debugging". Device dialog box "Allow USB debugging?" will ask you to confirm your computer's RSA fingerprint. Make sure you check the option "Always allow from this computer" and tap OK button.
Run and check your "Device Chooser" dialog again. It should change from [OFFLINE] or whatever it was to the device's name with spelled out Android version and API. State field will change to "Online" and Compatible field will change to "Yes".

If you are getting this error using an emulator, not a physical device, I have also found that terminating adb.exe from task manager and then starting up the AVD again fixes this problem.

this error The selected device is incompatible means that your phone has an API that your app can't support. To resolve it, go in the SDK Manager and download the sources corresponding to your device API.
Then go in the build.gradle file, and verify that at minSdk there is written the oldest you have downloaded.
It's just strange that the APi of your phone is declared as API 1, but try to find the real API and download the sources for it.

I was also having the exact problem. Here are the steps to resolve it.
Make sure you have adb.exe in your PATH. For windows system you can find it here: C:\Users\<User Name>\AppData\Local\Android\sdk\platform-tools\
From terminal or command Prompt run adb kill-server
Now just hit the play button to start the app.

I had this exact same problem with my Nexus 5x. I believe it's related to the USB type-C cable. I took the suggestion of the accepted answer and plugged the cable into a usb hub and then into my machine and it worked perfectly.

Please do the following
Click File>ProjectStructure> Select Flavour from the panel set Min Sdk version 1

if anyone else is getting an issue with this you can check your SDK Manager and ensure that the build tools for your specific API version is installed. If it's not installed then install it and should solve the problem.

This is because you minSdkVersion of you application is heigher than that in you phone.you can fix the minSdkVersion of you application to solve this problem.

Usually whenever I connect the android device for usb debugging, the device will prompt me asking for providing permission to enable usb debugging.
In my case, for some reason, I didnt get this prompt and hence, I got this error. I have turned off developer options & USB debugging, turned on again. Then, I got the prompt and the issue is solved

I faced the same problem a few days ago and I solved it by using following steps:
Instead of using the Device Chooser dialog, you have to deploy it directly. Steps to fix the issue:
Open the Run/Debug configurations dialog.
Select your app configuration from the tree on the left.
In the General tab, locate the Target Device group box or the drop down menu( in android studio 1.5.1) and select the USB Device radio button.
When you run the app it will not display the Device Chooser dialog, it will deploy the app directly on the connected android device directly.

However it is strange, the message "device is incompatible" could appear also due to the lack of the authorization of the USB connection on the device. I had it just now.

After setting up developer mode, and ticking the allow USB on my phone. I ran Android studio and got API1 incompatible. I looked at my phone Huawei Y3, which was waiting for a response, "will you allow device with mac address blah to connect to your phone?". Problem solved.

I got the same problem when I switched Samsung 10" pads with a friend. Under Windows 10, I went into the DOS Command Prompt, changed to the folder containing the adb.exe file which was C:\Users\\AppData\Local\Android\sdk\platform-tools, and entered the 'adb kill-server' command as described above. When I went back into Android Studio and selected shift-F9 (Debug App). ADB restarted and recognized the new pad as compatible. ADB seems to have problems switching between devices. Interestingly, boths pads had identical Android component builds.

I was using my old mobile usb cable. When I replaced the cable with the new mobile one, and adb kill-server, I was able to connect my device. I couldn't believe it.

Let your device be connected
Disable USB debugging
Enable USB debugging
Run config choose the device.

Android Programming with eclipse

my android phone is not detecting in pc even though I installed all the necessary drivers and all are up to date, can anyone tell me steps to install device in windows 7. my android phone is HTC one x.(I am running my project in eclipse indigo)

Start SDK manager
Go To Extra
See whether Have you installed Google USB driver if not install this.
Restart Eclipse.
Again Connect Your device with the following steps.
from your device check that whether have you Started USB debugging mode on from
Developer Options
Checked USB debugging with USB. Device should be connected as MTP.
If Developer Option is not available on your device you can enable it by following steps
Go to Settings
About Phone
Tap Build number continue 7 to 8 times (Don't remember exact figure)
You will see the Toast "You are now developer"
Developer Options will be enable now.

Did you enable developer option on your device?
this link might help http://www.developer.com/ws/android/connecting-your-android-device-to-eclipse.html

If the aforementioned answers don't work, there is a workaround with connecting some Android phones where you should connect it 'as a camera' in order for the PC to recognize the device. (It won't detect them otherwise)

Download mobogenie3 setup and connect your device ,mobogenie3 will automatically download your device driver and install it .

Android Studio doesn't recognize my device

Here is the problem. I want to run my Android Studio apps on my device (Samsung Galaxy Ace 2). But nothing works for me. Tell me what I've missed:
1) USB debugging is on
2) ADB driver is installed (in device manager i can see Android Composite ADB Interface)
3) ADB device list is still clear, even if i reset server(adb kill-server, adb start-server, adb devices - list of devices is clear)
4) in google usb driver directory, in android_winusb.inf file I added my device identificators
5) Android device manager still cannot connect to my device, showing this error when I reset it: "adb connection error an existing connection was forcibly closed by the remote host"
So I will be glad to hear any advices. Hope you'll help me

Did you try to configure the "Media Mode" in "Camera (PTP)" instead of "Media device (MTP)"? This is sometimes solving the issue. Its in the USB Computer Connection options of your Android device, you should see an "authorize" dialog then.
Update 04/2017: looks like it has been fixed in Android 7.1.2

I have done numerous ways of handling that issue. Finally it has worked! I am using LG Optimus II, but I believe the following steps are generic to other Android devices as well.
Step 1:
Make sure your device is enabled for development. If yes, go to Step 2, otherwise go to Settings > About phone and tap Build number seven times which is magic number :-).
Now Developer Options is available in the Settings.
Step 2:
Before you plug your device to PC, Go to Settings > Developer Options and select USB Connection method.
Step 3:
Plug the phone to the PC, you are given options for the USB Connection method, and please select Internet connection. Make sure you have connected to the Internet. By the way, I have changed MTP to PTP, it did not work for me. Therefore, I tried Internet connection mode, then it worked.
Step 4:
Run the app in the Android Studio, it will ask you to authorize the device for development, and select YES!.
Step 5:
Run the application via Android Studio and choose the device, not emulator, and BINGO! Welcome to Android development board.

Try swapping the USB port the cable is plugged into.
Sounds crazy but after 20 minutes of debugging this worked for me.

I also tried above solutions but got no luck. So here's what I did:
Download and install PdaNet+ to fix connection issues between my computer and android device
Enable USB debugging on my android device
Unplug the phone and plug it again after it's installed
Run my app and voila! My android device is now recognized by Android Studio

Although my computer could recognise my phone, I had to install the official drivers from the Samsung developer site to get adb/Android Studio to recognise it:
Samsung Android USB Driver for Windows

Click Revoke USB debugging authorization in Developer option and try it again.

Solution for those working with Huawei phones - You will get this error when ADB interface is not installed. Check if you have installed Huawei HiSuite. USB driver gets installed when you install HiSuite (I suppose this is true for most of the new phones that come with a Sync Software). If the ADB interface is installed on your computer you should see 'Android Composite ADB Interface' under Android Phone in your Device Manager as shown in this picture.

If you have Mi Device than you need to enable this two option after enabling Developer Mode.
USB Debugging (Enable = True)
Install via USB (Enable = True)
See this screenshot.

LG Optimus Zone 2 pp415 d\n connect in mtp, but does work in internet connection mode. Lost lots of time messing with it. There's no doc for this, but I'd suggest trying all 4 of the connection options. Only 1 that works for me is Internet Connection->Ethernet, then win 8 auto-detects a driver and installs it. In MTP mode despite all drivers being registered with device manager, adb doesn't pick it up.

I had the same problem. So here is what i did
reinstalled the device driver
changed the USB computer connection from MTP to Mass storage(UMS)
And it worked.

For me, I tried the above. Turns out my USB cable was bad. I changed the cable and then it worked.

I am sorry that i bothered you all. The problem was my device is cloned in different places in device manager. It was gone when I tried to update driver for my phone in "Other devices" list, and before i have been updating it in wrong sections. Thank you all.

In my case it was due to already running and hanged adb.exe on another user under my PC. I had two users on my PC, the second user had the adb.exe process hanged even when I tried to end the process. It worked with me after (End Process Tree) from the Task Manager.
Hope this will help someone with multiple users :)
Ahmad

In addition to the above configurations, I had to set deployment target to "Open Select Deployment Target Dialog", run once (choosing my device from the options listed), and from then on Android Studio was able to see my device even after changing the deployment setting back to "USB Device". My SWAG is that since Android Studio uses its own internal cache to find your device, it has to be initialized first.

I was on Samsung S8 and had same problem too. After I installed Samsung Kies, issues was resolved for me, as I believe it had updated the correct driver required for my Samsung S8.

On Windows 7 , the only thing that worked for me is this. Go to Device Manager -> Under Android Phone -> Right Click and select 'enable'

i had to install android studio in 2 machines and ive solved this problem intalling samnsung kies, i use 3 diferents samnsung devices (plus some other of my family and friends) and i dont have to strugle with the drivers, it works for me and i recomend it. hope it helps

For me, this ended up being because I had the wrong SDK level installed (new version of Android Studio installed the SDK for Android 10, whereas I have a device that runs only Android 8.1). While Android Studio would "recognize" the device and display a string in the "devices" menu instead of just saying that no device was connected, installing the right SDK level for my device ended up changing the string to something recognizable (my device's model name) and allowed me to actually run my app over ADB.

I had a big problem with my Samsung S10 Plus as it was not detecded by Android Studio on my Macbook even if I did all what is required to be detected, that is to say:
Enable developer mode (7 taps on Build version in Android settings)
Enable USB debugging
What I did is to start "Android File Transfer" on my Macbook and the magic happened. A popup appeared on my device asking if I want to authorize an USB access to it. I clicked "Yes, always" and now Android Studio can detect my device on my Mac :)

Change the connection method Build-In CD ROM it works for me

On HTC mini one 2, besides enabling the Developer Options, the following worked for me:
Go to More in Wireless & Networks
Mobile Network Sharing
In USB network setting
Select Internet pass-through

How to debug my android aplication with my phone Allview P5

I open the list with http://developer.android.com/tools/device.html, however I don't see Allview in the list. How can I debug an android application with eclipse - Allview P5?

You must install an adb driver, and since Allview does not have one ( I experienced the same problem ) you have to use an universal one:
https://plus.google.com/u/0/103583939320326217147/posts/BQ5iYJEaaEH
This worked perfectly for me (I own a P6 Stony).

USB Debugging should be enabled. You may find that option in Settings>Developer options in some phones and in Settings> Applications in some others phones(basically the option will be present in settings somewhere if its available on the phone so please check thoroughly). Secondly not all phones have this functionality so check first whether it has. Also check if your devices device drivers are installed properly. if not reinstall them. finally do Check whether your Android SDK is up to date. if not, then update it.
If USB Debugging option is not available. You can still install your app on such phones with the help of ADB which stands for Android Debug Bridge. for this connect your phone via the USB cable provided. Once the device is recognised. Open your command prompt and type
adb devices
if you see your phone listed there then type
adb install your_location/your_file.apk
But in this case you wont be able to know where your app is crashing. You can just test if it works or not.

All device vendors may not provide debugging functionality...
if it is provided then Did you put your device into debug mode? This should be found under Settings-> Applications->Development.
and even Install the USB Driver using Android SDK Manager: