79     def __init__(self, path, serial=None):  argument
81         self.serial = serial
108         command = '%s -s %s %s' % (self.path, self.serial, cmdline)
139                  serial=None, apks=None):  argument
145         use_device = use_device or serial or \
148         self.adb.serial = self._resolve_serial(use_device, serial)
150         if self.adb.serial:
154         if self.adb.serial is None and not self._is_android_env:
223     def _resolve_serial(self, device, serial):  argument
235             if serial:
238                                         (self.adb.path, serial))
243                         'device mode?' % serial)
247                         'into device mode and try again.' % serial)
248                 return serial
251                 serial = os.environ['ANDROID_SERIAL']
252                 command = '%s -s %s get-state' % (self.adb, serial)
258                         'found.' % serial)
260                     return serial
303                         (device_apk, self.adb.serial))
322                     'device "%s".' % self.adb.serial)
572             serial=args.serial,