code: private void stopEmulator( IDevice device )
      {
          int devicePort = extractPortFromDevice( device );
          if ( devicePort == -1 )
          {
              getLog().info( "Unable to retrieve port to stop emulator " + DeviceHelper.getDescriptiveName( device ) );
          }
          else
          {
              getLog().info( "Stopping emulator " + DeviceHelper.getDescriptiveName( device ) );
  
              sendEmulatorCommand( devicePort, "avd stop" );
              boolean killed = sendEmulatorCommand( devicePort, "kill" );
              if ( !killed )
              {
                  getLog().info( "Emulator failed to stop " + DeviceHelper.getDescriptiveName( device ) );
              }
              else
              {
                  getLog().info( "Emulator stopped successfully " + DeviceHelper.getDescriptiveName( device ) );
              }
          }
      }
docs: This method contains the code required to stop an emulator
  
  @param device The device to stop