Android studio no longer detecting device after update

Question

A few hours ago, my Android studio was working very fine. I could write, build and run on my test device (TECNO K7).

I decided to update my Android Studio to 3.5. The whole process went well except that I cannot find my device among the list of devices any longer. I have also tried with multiple devices, I got the same outcome. When I click on the run-button, the app runs on the Pixel 2 emulator. However, I want it to run on my device.

Here's a screenshot of what my menu looks like. Note that the device (TECNO K7) is currently connected:

Is there something I am doing wrong?

UPDATE:

I tried restarting my ADB server and I go the following error:

Unable to locate ADB.

I have also tried re-installing the following tools multiple times, still the same outcome:

• Android SDK tools
• Android SDK Build-Tools
• Android SDK Platform-Tools

PS: For reference, I use Mac OS and it is also important to remember that my Android studio was working perfectly fine before the update.

Answer 1

Solution:

• Drivers not installed: If the Android Physical device is not a Google/Nexus product than you have to download the OEM drivers of the particular model.

• HAXM not installed properly : Hardware Accelerated Execution Manager must have not installed properly on your computer. Try reinstalling it directly from the options available in your SDK.

• No proper Path : Sometimes though the files are available in the local system, The Android Studio is not guided with the accurate path name to reach the file.

Hope this will be useful to you.