Visual Studio and Android Device Monitor doesn't detect any devices

Question

I've just installed VS2015 Community with Xamarin to develop some mobile apps. The problem is, I can't achieve debugging Android apps on any device. Android Device Monitor shows empty list. I tried connecting different phones, which I know are detected on my friend's PC. I can explore their files from windows explorer, from there computer sees them.

• USB Debugging on the phone is turned on.
• USB connection mode is set to camera, no change at all.
• I have Google USB driver installed in Android SDK manager.
• I tried adb kill-server, adb start-server. Nothing changed. adb devices shows empty list.

This is device manager while Developers options are disabled on the phone. And here with enabled Developers options I also tried updateing driver to google usb driver, but windows said it's up to date.

Solution 1

You most likely did not grant access to the device. Try to go into the developer settings on the smartphone and revoke the USB debugging authorisation. Then connect the phone to the pc and and wait for a popup on the phone which you should accept. After accepting you should see your device with adb devices.

You can also try to set the connection mode to MTP (instead of the camera PTP).

Hope it helps!

Solution 2

Enable the device for development

Goto: Device > Settings > Developer Options > tick USB debugging

Solution 3

Sometimes just restarting Visual Studio might help

Solution 4

Try the this: 1 - Close Visual Studio 2 - connect your device 3 - Restart visual studio with the device already connected by usb (with the device options checked)

Solution 5

I had the same issue after updating Visual Studio found that in recent versions is better if you open VS in administrator mode to properly work, this should fix the problem.

View more solutions

Comments

[Rico]

USB debugging is on. I read about MTP, but can't find it on my phone (Huawei P8, Android 5)

[c0delama]

Have you tried revoking the authorisation and reconnecting your phone?

[c0delama]

Did you accept the dialog in the first answer of this question? stackoverflow.com/questions/15053463/…

[Rico]

Yes, several times

[c0delama]

Is your smartphone properly installed (with AND without developer settings enabled) and are there errors in the windows device manager?

[c0delama]

Please google for proper Huawei P8 drivers (you need normal Windows drivers as well es ADB drivers). After that the exclamation marks in the device manager will disappear and you will get the desired prompt on your smartphone.

[Rico]

Ok, there was no direct clue on Huawei site, but I find application called HiSuite and after instaling it, Huawei P8 is visible on Android Device Manager. Thanks for support. :)

[c0delama]

With installing the HiSuite you also installed the drivers ;) Please accept my answer, thanks.

[Steve Wellens]

I had the same issue. I fixed it by right clicking the device in the device manager and selecting Update Driver.

[PLOW]

Even though Windows 10 automatically install the drivers, it didn't work. I had to install drivers from the manufactures to get my physical device to show in Visual Studio

[Bruno]

If you enable the developer options for the first time, this option will be disabled by default, so, in order to get it working again, you need to Enabled it again. This solution worked for me.

[Richard Hammond]

Of course! Why didn't I think of that!!?!! A reboot to solve a software problem!! How original!!!! ... and unusual!!!!!!!!!!

[Winteriscoming]

@c0delama you are my hero!

[Vladimir]

On my Huawei P30 Pro this is in Settings -> System & updates -> Developer options -> USB debugging. The solution works