Can not start android emulator from command line

I had the exact same issue and I am using a workaround. Let me explain:

There is a 'bug' in the emulator: it is not able to find the relative path

..\emulator\lib64\qt\lib

Incredibly awesome since this is so simple to fix... whatever.

Just cd to c:\path\to\your\android-sdks\emulator, typically something like

cd c:\Users\userName\android-sdks\emulator

then, in this directory, run any emulator command you want, for instance your command:

emulator.exe -avd Nexus_3_7_API_17_ver_4_2_1

in your teminal this will look like this:

c:\Users\userName\android-sdks\emulator> emulator.exe -avd Nexus_3_7_API_17_ver_4_2_1

and it will work.

Adding emulator path in Environmental Variables solved my problem. Now, I can run emulator command from anywhere.

You can achieve this by following these steps:

1. Open 'Advanced System Settings'.
2. Click 'Environmental Variables'.

3. Add the following to Path variables in both boxes:

   %USERPROFILE%\AppData\Local\Android\Sdk\emulator

4. Restart Command Prompt.

Note: Your path could be different than the one mentioned above. If this is the case, then you have to search for your emulator path.