Develop Reference

Android device suddenly not found

I am working at an android studio project and I always work with my own physical device SAMSUNG S7. It always worked (for a few weeks now) but today suddenly from one moment to the other my device cant be recognized by android studio anymore. I didnt change any settings! I just changed a line in the code (like a hundred times before) and after it my device is not shown in the list of devices. There is only the virtual device which is useless for me because it never displays the app correctly. Just my physical device shows the app correctly so now I need help. Otherwise I cannot continue programming.
I tried to reopen android studio and restart my phone but it didnt help.

Changing the cable plug mode (credits to Hack06)
Just swipe down the OS status bar, and tap on the device, then choose another connection mode.
Installing Samsung's development drivers
When this doesn't work, try installing the drivers provided by Samsung to improve developments. These can be found here.
USB Debugging
USB debugging may have failed. Or all of the developer settings have been reset. Try that
Reboot your phone into ODIN mode
Caution:
ODIN mode is in charge for flashing your Android phone, and if you’re not careful, you can cause permanent damage to your phone.
This solution applies only to Samsung’s devices, since they are the only devices with access to ODIN mode.
A guide how to access ODIN mode for your phone can be found here.
Install KIES software
If nothing worked till here you might want to download KIES software.
KIES software only works for Samsung’s devices.
Samsung KIES is part of Samsung Smart Switch.
Download here.
Google - Android USB Driver
My last suggestion would be to install Google's Android USB drivers. An official guide can be found here.

This may sound obvious..
but sometimes it could be a cable issue
even if it's charging it could not transfer data
try a new cable

Eclipse not detecting my Galaxy S3 GT-I9305 in list of devices

I know this question has been asked numerous times, but none of the threads have had an answer to solve my problem. It seems no matter what i try Eclipse just wont detect my phone, I have set it to debug mode in the settings, i've installed "Kies 3" on my laptop and it says i have the latest drivers already installed on my phone when i try to update it.
I've installed the google USB driver package from the sdk manager and have downloaded and installed the samsung driver from the samsung website. Windows recognizes the device and in the device manager under android phone it appears as "SAMSUNG android ADB Inerface".
Im running windows 7 and have even tried deleting all the mounted dive drivers from regedit as i seen suggested in another thread but still no joy! Really starting to get frustrated with this at this stage i've been trying for two days now to figure this out!
This is such a pain! I need to be able to debug on my phone too as i'm using features that the emulator can't handle (i.e. audio recording). I'm all out of ideas here so any help would really be appreciated!
Thanks

The method I followed to install my GT-I9300 drivers was this:
Download samsung drivers from this link:
http://developer.samsung.com/android/tools-sdks/Samsung-Andorid-USB-Driver-for-Windows
Then just connect your phone and make sure you have a stable Internet connection: It will download required drivers automatically.
Also, make sure you have enabled Android developer options in your phone settings. Enable USB debugging in developer options.

I usually get it to work, when I switch the USB mode in my smartphone (e.g. MTP to PTP). This way, windows starts downloading more drivers.

1) Try disconnecting device from PC, revoke USB Debug authorization from settings menu, and then re-authorize the computer you are working on once you connect it again.
2) Check to see if you see the phone in DDMS perspective (left hand side) - if so, try clicking on it and it should work.
3) try removing all drivers (Google, Samsung etc.) + scan "leftover" registery entries using a reg cleaning program. Then install ONLY Kies Light version and try again.
4) It once worked for me - try changing the USB cable (preferably, to an original one)
Let us know if something worked!

1) enable USB debugging in your phone's settings.
2) ensure that you have the proper drivers installed.
3) open adb in command prompt and run "adb connect"

Hardware debugging using Samsung Galaxy S3 in Windows

Picked up my S3 on launch and want to get started learning to develop for android using Eclipse. So far I'm having fun!
However, I want to be able to debug my application on the phone hardware itself and not just in an AVD. My problem is that I cannot find appropriate USB device drivers. The Samsung support site is garbage and windows update told me 'where to go'.
Has anyone got this working yet? If so, how?

For those still looking, you don't need to install the bloat. Go to:
http://www.samsung.com/us/support/owners/product/SCH-I535RWBVZW
Click on or scroll to "Manuals & Downloads" and then USB (Driver) is available under "Downloads".
Direct download link: Samsung USB Driver - 1.5.45.00

Turns out you have to install Samsung Kies to get the USB driver. Similar to the iPhone. I wanted to avoid this unnecessary bloat (i plugged my phone in and it threw a WPF exception...) and thankfully you can uninstall Kies without uninstalling the driver. Result.
After that, ADB is able to see the phone with no problem at all and I can debug on the device perfectly.

you need the usb driver for it. Once you have that installed simply connect the phone via usb to your machine, start eclipse and adb will pick up the device given that the drivers installed properly. try this link, one of these will probably have the driver. Samsung Galaxy S3 downloads

Can be downloaded on the following link
http://www.samsung.com/uk/support/usefulsoftware/ASPS/JSP

There's no need for KIES or other bloat!!
There's a very useful toolkit that does much more then kies, and it's available here:
http://forum.xda-developers.com/showthread.php?t=1703488

Direct link from Samsung's Downloads section:
http://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=US&CttFileID=5301407&CDCttType=SW&ModelType=C&ModelName=SCH-I535RWBVZW&VPath=SW/201211/20121110030255344/Samsung_USB_Driver_for_Mobile_Phones_v1.5.14.0.exe

Why won't Eclipse/adb detect my Samsung Galaxy Tab device on my Mac?

I've connected my Samsung Galaxy Tab device to my Mac. Yes, I've turned on debugging. When I go to run my application to test on the device the device is not listed on the Android Device Chooser menu. Running the ./adb devices shows no results.
NOTE: Posting this question for others to find. When looking for the solution earlier all I was able to locate were answers to broken links to device driver downloads for Windows.

Make sure you uncheck
Settings > Applications > Unknown Sources (Allow installation of non-Market applications)

Turn on USB Debugging inside Settings > Applications > Developers Settings

If you're trying to connect to a Mac, I had this issue with a Samsung Galaxy Tab 10.1 running Android 4.3. To enable developer options, open the Settings app, tap on "About device" under the "General" tab and then tap on the "Build number" repeatedly (it's grayed out but you can tap on it anyway). A small pop-up will appear showing the amount of additional taps you need to do to turn on these options.
Once enabled, just turn on USB Debugging and it'll show up in Eclipse just fine.

I had this problem on my Mac and after 30 minutes tried switching USB ports and it finally started working on the second port.

I fixed it by reboot the device (Samsung Galaxy Tab2 7.0)

Update your driver for samsung. It can be found here: http://developer.samsung.com/android/tools-sdks/Samsung-Andorid-USB-Driver-for-Windows
Connecting your phone after development mode is on, and USB debugging is on.
At connecting to the PC the phone asks to trust this location. Finally.
This fixed my problem while all other tips were incomplete.

It does not answer your question of how to get ADB to see the device - I could not get that working. But what I did to install an APK I needed to test was to put it in Dropbox on my computer, then install it from there on the device.

Connect your device via USB hub instead of directly connecting to one of the usb ports on MAC. It worked that way for me. Please give a try.

There's also a pop-up that comes up at times requesting the currently connected computer to have access to your device(not to be confused with the Linux not supported pop-up; it lies ; ] ). I continued to receive Target:Unknown in Eclipse until I managed to catch it and accept. This is on a Samsung Note 8", which I believe is registered as a Tab 10.1 in my Arch Linux udev rules.

It may also happen that USB debugging is not checked on your device. Please go to developper options in your device and check it is enabled.
By the way, for devices with android Jelly Beam (4.2) and later versions, you will find out that this option is hidden. To activate it, click 7 times on the compilation number, and the option will be activated.

Tried everything, nothing helped. Including
USB debugging enabled
MTP/PTP
ADB restarted
Device/PC restarted
Tried Samsung's USB driver
By tricking/modifying driver installer, installed Google OEM Usb drivers for Galaxy Tab.
All software up-to-date
The only thing that helped is installing Kies3 + setting PTP on device, instantly authorization pops out in device. Everything OK now.
Kies3 download here: http://www.samsung.com/uk/support/usefulsoftware/KIES/

Enable USB Debugging mode solve the problem!
For those who don't know how to enable it (it's very hidden on Android 4.3 onward), see this.

In my case, this solved the problem:
unchecked the Settings->Security->Unknown Sources,
clicked on the upper left corner and changed USB mode from MTP to PTP,
unplugged/plugged the device, and
clicked OK on the USB debugging prompt.

Had this problem last year, never solved it. Again, after googling high and low, I could not find a cure for the USB debugging flakiness. Now for the good news:
1) Root your device. 2) Install adbWireless widget from Play (I am in no way associated with the author).
You are now good to go. After starting adbWireless and following its directions, you can now debug through adb wirelessly to your device, in my case, the original 7" Galaxy Tab.

Android Development on Samsung Galaxy S

I am trying to test my Android apps in my Samsung Galaxy S i9000 but I dont know why, I cant. It doesn't appear in the Devices tab on Eclipse.
I've downloaded the Google Drivers via SDK Manager, I've got the Samsung Drivers for Windows x64, I've put it in debugging mode, and still nothing.
This is weird, because some time ago, but in another computer, I was able to do this with my old Xperia X8 and Nexus S, with no problem.
This phone is rooted and has a MIUI Rom on it, but my old phones were rooted and had cooked rooms too, and worked perfectly.
Am I missing something?
Thanks a lot!

On your computer, go to the start menu and type devmgmt.msc (it runs Device Management. There should then be a yellow exclamation-point box thing and a name of a driver (for the one that's missing). If there exists that issue, please comment with the exact name of the missing driver. If that does not appear there, then that means it's an issue with the MIUI rom, not so much the drivers.
I personally had some custom roms that I could not get to support ADB.
Though, if I installed "Remote ADB" from the Android Market, that would work via Wi-Fi even without USB drivers, so that is another recommendation.

Go settings on phone, manage applications, development, usb debug is off by default.