Android Studio says: "No device connected" yet I already tried many possible solutions Running Windows 7, and I have just downloaded the latest Android Studio version, and started a project. Now I'd like to test the application on my device but Android Studio says on the bottom left "No devices connected". I've tried a couple of things such as:


Updating my Samsung S6 edge drivers through device manager, which were updated now. 
Have debugging mode turned on and USB debugging mode on. 
Ran adb devices command to list devices but none show up. 
Downloaded new universal ADB drivers. 
Toggled between MTP and PTP modes.
Restarted computer/phone/Android Studio/ADB tens of times. 
Deleted phones drivers from device manager and installed again. 
Re-installed Android Studio. 


I'm at a loss as of now. How do I fix this issue?
Windows 7 doesn't always detect the android device connected as an interface for adb. If your Samsung drivers is not detecting the phone you have a few choices:


Try reinstalling the Samsung android drivers. Might be a good idea to
remove the universal android drivers but I don't have that problem
with my Windows 7 machine.
You can mod the inf of the universal driver with your device's VID and PID by adding it if it's missing (which it possibly is missing
since it's not a nexus/google device). Then use Device Manager and
point your device to that driver to use and install.
Remove the Samsung android driver and the universal driver. Then install Samsung's Smart Switch app, which will install the latest
Samsung android driver.


If you are committed to using the universal android driver, then you need to make sure you have the latest updates with the Android SDK Manager. If your tools are out of date or not the latest your tools may be out of sync with the platform it's trying to connect to.