restarting adb server before each testing start will cause conflict for multiple emulators

build/android/pylib/android_commands.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Provides an interface to communicate with the device via the adb command.
 
 Assumes adb binary is currently on system path.
 """
 
 import collections
@@ skipping 66 matching lines @@
     List of devices attached
     027c10494100b4d7        device
     emulator-5554   offline
     emulator-5558   device
   """
   re_device = re.compile('^emulator-[0-9]+', re.MULTILINE)
   devices = re_device.findall(cmd_helper.GetCmdOutput(['adb', 'devices']))
   return devices
 
 
+def GetAVDs():
+  """Returns a list of AVDs."""
+  re_avd = re.compile('^[ ]+Name: ([a-zA-Z0-9_:.-]+)', re.MULTILINE)
+  avds = re_avd.findall(cmd_helper.GetCmdOutput(['android', 'list', 'avd']))
+  return avds
+
+
 def GetAttachedDevices():
   """Returns a list of attached, online android devices.
 
   If a preferred device has been set with ANDROID_SERIAL, it will be first in
   the returned list.
 
   Example output:
 
     * daemon not running. starting it now on port 5037 *
     * daemon started successfully *
@@ skipping 841 matching lines @@
           if len(process_results) <= 8:
             continue
           # Column 0 is the executable name
           # Column 1 is the pid
           # Column 8 is the Inode in use
           if process_results[8] == socket_name:
             pids.append( (int(process_results[1]), process_results[0]) )
         break
     logging.info('PidsUsingDevicePort: %s', pids)
     return pids